Wrote tests for most services, applied EF core optimisations

LiteCharms.Features.MidrandBooks.Tests/AuthorServiceFeatureTests.cs

@@ -0,0 +1,81 @@
+using LiteCharms.Features.MidrandBooks.Authors;
+using LiteCharms.Features.MidrandBooks.Authors.Models;
+using LiteCharms.Features.MidrandBooks.Tests.Common;
+using LiteCharms.Features.Models;
+
+namespace LiteCharms.Features.MidrandBooks.Tests;
+
+public class AuthorServiceFeatureTests(Fixture fixture, ITestOutputHelper output) : IClassFixture<Fixture>
+{
+    private readonly AuthorService authorService = fixture.Services.GetRequiredService<AuthorService>();
+
+    [IntegrationFact]
+    public async Task CreateAuthorAsync_ShouldReturn_ResultWithAuthorId()
+    {
+        var request = new CreateAuthor
+        {
+            Name = "John",
+            LastName = "Doe",
+            Company = "Solo Publishers",
+            Email = "solo@publishers.co.za",
+            PublisherType = PublisherTypes.Independent,
+            ImageUrl = ""
+        };
+
+        var result = await authorService.CreateAuthorAsync(request, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+        Assert.True(result.Value > 0);
+    }
+
+    [IntegrationFact]
+    public async Task UpdateAuthorAsync_ShouldReturn_ResultWithSuccess()
+    {
+        var request = new UpdateAuthor
+        {
+            Name = "Jane",
+            LastName = "Doe",
+            Company = "Solo Publishers",
+            Email = "solo@publishers.co.za",
+            PublisherType = PublisherTypes.Independent,
+            ImageUrl = ""
+        };
+
+        var result = await authorService.UpdateAuthorAsync(1, request, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+    }
+
+    [IntegrationFact]
+    public async Task GetAuthors_ShouldReturn_ResultWithAuthorList()
+    {
+        var range = new DateRange
+        {
+            From = DateOnly.FromDateTime(DateTime.UtcNow.AddDays(-7)),
+            To = DateOnly.FromDateTime(DateTime.UtcNow),
+            MaxRecords = 1000
+        };
+
+        var result = await authorService.GetAuthorsAsync(range, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+        Assert.NotEmpty(result.Value);
+    }
+
+    [IntegrationFact]
+    public async Task GetAuthorAsync_ShouldReturn_ResultWithAuthor()
+    {
+        var result = await authorService.GetAuthorAsync(1, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+        Assert.NotNull(result.Value);
+    }
+
+    [IntegrationFact]
+    public async Task UpdateAuthorStatusAsync_ShouldReturn_ResultWithSuccess()
+    {
+        var result = await authorService.UpdateAuthorStatusAsync(1, true, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+    }
+}

LiteCharms.Features.MidrandBooks.Tests/BooksServiceFeatureTests.cs

@@ -0,0 +1,52 @@
+using LiteCharms.Features.MidrandBooks.AuthorBooks;
+using LiteCharms.Features.MidrandBooks.Tests.Common;
+
+namespace LiteCharms.Features.MidrandBooks.Tests;
+
+public class BooksServiceFeatureTests(Fixture fixture) : IClassFixture<Fixture>
+{
+    private readonly BooksService bookService = fixture.Services.GetRequiredService<BooksService>();
+
+    [IntegrationFact]
+    public async Task CreateBookAsync_ShouldReturn_ResultWithBookId()
+    {
+        var result = await bookService.CreateBookAsync(1, 2, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+    }
+
+    [IntegrationFact]
+    public async Task GetBookAsync_ShouldReturn_ResultWithBook()
+    {
+        var result = await bookService.GetBookAsync(1, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+        Assert.NotNull(result.Value);
+    }
+
+    [IntegrationFact]
+    public async Task GetBooksByAuthorAsync_ShouldReturn_ResultWithAuthorBooks()
+    {
+        var result = await bookService.GetBooksByAuthorAsync(1, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+        Assert.NotEmpty(result.Value);
+    }
+
+    [IntegrationFact]
+    public async Task GetPublishedBooksAsync_ShouldReturn_ResultWithBublishedBooks()
+    {
+        var result = await bookService.GetPublishedBooksAsync(0, 1000, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+        Assert.NotEmpty(result.Value);
+    }
+
+    [IntegrationFact]
+    public async Task UpdateBookStatusAsync_ShouldReturn_ResultWithSuccess()
+    {
+        var result = await bookService.UpdateBookStatusAsync(1, true, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);        
+    }
+}

LiteCharms.Features.MidrandBooks.Tests/Common/Fixture.cs

@@ -2,7 +2,7 @@
 using LiteCharms.Features.MidrandBooks.Abstractions;
 using LiteCharms.Features.MidrandBooks.Extensions;
 
-namespace LiteCharms.Features.MidrandBooks.Tests;
+namespace LiteCharms.Features.MidrandBooks.Tests.Common;
 
 public class Fixture : IDisposable
 {

LiteCharms.Features.MidrandBooks.Tests/Common/IntegrationFactAttribute.cs

@@ -1,4 +1,4 @@
-namespace LiteCharms.Features.MidrandBooks.Tests;
+namespace LiteCharms.Features.MidrandBooks.Tests.Common;
 
 public class IntegrationFactAttribute : FactAttribute
 {

LiteCharms.Features.MidrandBooks.Tests/CustomerServiceFeatureTests.cs

@@ -0,0 +1,201 @@
+using LiteCharms.Features.MidrandBooks.Customers;
+using LiteCharms.Features.MidrandBooks.Customers.Models;
+using LiteCharms.Features.MidrandBooks.Tests.Common;
+
+namespace LiteCharms.Features.MidrandBooks.Tests;
+
+public class CustomerServiceFeatureTests(Fixture fixture) : IClassFixture<Fixture>
+{
+    private readonly CustomerService customerService = fixture.Services.GetRequiredService<CustomerService>();
+
+    [IntegrationFact]
+    public async Task CreateCustomerAsync_ShouldReturn_ResultWithCustomerId()
+    {
+        var request = new CreateCustomer
+        {
+            Company = "Book Lovers",
+            Email = "hank@booklovers.com",
+            Phone = "555 1245 8577",
+            Website = "https://www.booklovers.com"
+        };
+
+        var result = await customerService.CreateCustomerAsync(request, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+        Assert.True(result.Value > 0);
+    }
+
+    [IntegrationFact]
+    public async Task CreateCustomerContactAsync_ShouldReturn_ResultWithCustomerContactId()
+    {
+        var request = new CreateCustomerContact
+        {
+            Name = "Sipho",
+            LastName = "Madlanga",
+            Phone = "0710857365",
+            Email = "sipho@madlanga.africa",
+            Type = ContactTypes.Business
+        };
+
+        var result = await customerService.CreateCustomerContactAsync(1, request, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+        Assert.True(result.Value > 0);
+    }
+
+    [IntegrationFact]
+    public async Task CreateCustomerAddressAsync_ShouldReturn_ResultWithCustomerAddressId()
+    {
+        var request = new CreateCustomerAddress
+        {
+            Name = "Business",
+            BuildingType = AddressBuildingTypes.MixedUse,
+            Type = AddressType.Shipping,
+            Street = "123 Building 4, XYZ Suburb, Some Region",
+            City = "Johannesburg",
+            State = "Gauteng",
+            Country = "South Africa",
+            IsPrimary = true,
+            Enabled = true,
+            PostalCode = "12345"
+        };
+
+        var result = await customerService.CreateCustomerAddressAsync(1, request, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+        Assert.True(result.Value > 0);
+    }
+
+    [IntegrationFact]
+    public async Task UpdateCustomerAsync_ShouldReturn_ResultWithSuccess()
+    {
+        var request = new UpdateCustomer
+        {
+            Company = "Book Lovers",
+            Email = "hank@booklovers.com",
+            Phone = "555 1245 8578",
+            Website = "https://www.booklovers.com"
+        };
+
+        var result = await customerService.UpdateCustomerAsync(1, request, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+    }
+
+    [IntegrationFact]
+    public async Task UpdateCustomerContactAsync_ShouldReturn_ResultWithSuccess()
+    {
+        var request = new UpdateCustomerContact
+        {
+            Name = "Sipho",
+            LastName = "Madlanga",
+            Phone = "0710857366",
+            Email = "sipho@madlanga.africa",
+            Type = ContactTypes.Business
+        };
+
+        var result = await customerService.UpdateCustomerContactAsync(1, request, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+    }
+
+    [IntegrationFact]
+    public async Task UpdateCustomerAddressAsync_ShouldReturn_ResultWithSuccess()
+    {
+        var request = new UpdateCustomerAddress
+        {
+            Name = "Business",
+            BuildingType = AddressBuildingTypes.MixedUse,
+            Type = AddressType.Shipping,
+            Street = "123 Building 4, XYZ Suburb, Some Region",
+            City = "Johannesburg",
+            State = "Gauteng",
+            Country = "South Africa",
+            IsPrimary = true,
+            Enabled = true,
+            PostalCode = "12346"
+        };
+
+        var result = await customerService.UpdateCustomerAddressAsync(1, request, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+    }
+
+    [IntegrationFact]
+    public async Task UpdateCustomerStatusAsync_ShouldReturn_ResultWithSuccess()
+    {
+        var result = await customerService.UpdateCustomerStatusAsync(1, true, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+    }
+
+    [IntegrationFact]
+    public async Task UpdateCustomerContactStatusAsync_ShouldReturn_ResultWithSuccess()
+    {
+        var result = await customerService.UpdateCustomerContactStatusAsync(1, true, true, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+    }
+
+    [IntegrationFact]
+    public async Task UpdateCustomerAddressStatusAsync_ShouldReturn_ResultWithSuccess()
+    {
+        var result = await customerService.UpdateCustomerAddressStatusAsync(1, true, true, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+    }
+
+    [IntegrationFact]
+    public async Task GetCustomersAsync_ShouldReturn_ResultWithCustomerList()
+    {
+        var result = await customerService.GetCustomersAsync(fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+        Assert.NotEmpty(result.Value);
+    }
+
+    [IntegrationFact]
+    public async Task GetCustomerContactsAsync_ShouldReturn_ResultWithCustomerContactList()
+    {
+        var result = await customerService.GetCustomerContactsAsync(1, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+        Assert.NotEmpty(result.Value);
+    }
+
+    [IntegrationFact]
+    public async Task GetCustomerAddressesAsync_ShouldReturn_ResultWithCustomerAddressList()
+    {
+        var result = await customerService.GetCustomerAddressesAsync(1, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+        Assert.NotEmpty(result.Value);
+    }
+
+    [IntegrationFact]
+    public async Task GetCustomerAsync_ShouldReturn_ResultWithCustomer()
+    {
+        var result = await customerService.GetCustomerAsync(1, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+        Assert.NotNull(result.Value);
+    }
+
+    [IntegrationFact]
+    public async Task GetCustomerContactAsync_ShouldReturn_ResultWithCustomerContact()
+    {
+        var result = await customerService.GetCustomerContactsAsync(1, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+        Assert.NotNull(result.Value);
+    }
+
+    [IntegrationFact]
+    public async Task GetCustomerAddressAsync_ShouldReturn_ResultWithCustomerAddress()
+    {
+        var result = await customerService.GetCustomerAddressAsync(1, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+        Assert.NotNull(result.Value);
+    }
+}

LiteCharms.Features.MidrandBooks.Tests/OrderServiceFeatureTests.cs

@@ -0,0 +1,167 @@
+using LiteCharms.Features.MidrandBooks.Orders;
+using LiteCharms.Features.MidrandBooks.Orders.Models;
+using LiteCharms.Features.MidrandBooks.Tests.Common;
+using LiteCharms.Features.Models;
+
+namespace LiteCharms.Features.MidrandBooks.Tests;
+
+public class OrderServiceFeatureTests(Fixture fixture) : IClassFixture<Fixture>
+{
+    private readonly OrderService orderService = fixture.Services.GetRequiredService<OrderService>();
+
+    [IntegrationFact]
+    public async Task CreateOrderAsync_ShouldReturn_ResultWithOrderId()
+    {
+        var request = new CreateOrder(250, "At the intercomm, dial 1 then option 2");
+
+        var result = await orderService.CreateOrderAsync(1, request, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+        Assert.True(result.Value > 0);
+    }
+
+    [IntegrationFact]
+    public async Task AddItemToOrderAsync_ShouldReturn_ResultWithOrderItemId()
+    {
+        var request = new CreateOrderItem(1, 1, 2);
+
+        var result = await orderService.AddItemToOrderAsync(1, request, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+        Assert.True(result.Value > 0);
+    }
+
+    [IntegrationFact]
+    public async Task AddItemsToOrderAsync_ShouldReturn_ResultWithSuccess()
+    {
+        var requests = new List<CreateOrderItem>
+        {
+            new(1, 1, 1),
+            new(1, 1, 3)
+        };
+
+        var result = await orderService.AddItemsToOrderAsync(1, [.. requests], fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);        
+    }
+
+    [IntegrationFact]
+    public async Task RemoveItemFromOrderAsync_ShouldReturn_ResultWithSuccess()
+    {
+        var result = await orderService.RemoveItemFromOrderAsync(1, 5, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+    }
+
+    [IntegrationFact]
+    public async Task ClearOrderItemsAsync_ShouldReturn_ResultWithSuccess()
+    {
+        var result = await orderService.ClearOrderItemsAsync(1, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+    }
+
+    [IntegrationFact]
+    public async Task CancelOrderAsync_ShouldReturn_ResultWithSuccess()
+    {
+        var result = await orderService.CancelOrderAsync(1, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+    }
+
+    [IntegrationFact]
+    public async Task GetOrderAsync_ShouldReturn_ResultWithOrder()
+    {
+        var result = await orderService.GetOrderAsync(1, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+        Assert.NotNull(result.Value);
+    }
+
+    [IntegrationFact]
+    public async Task GetOrdersByCustomerAsync_ShouldReturn_ResultWithOrderList()
+    {
+        var result = await orderService.GetOrdersByCustomerAsync(1, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+        Assert.NotEmpty(result.Value);
+    }
+
+    [IntegrationFact]
+    public async Task GetOrdersAsync_ShouldReturn_ResultWithOrderList()
+    {
+        var range = new DateRange
+        {
+            From = DateOnly.FromDateTime(DateTime.UtcNow.AddDays(-7)),
+            To = DateOnly.FromDateTime(DateTime.UtcNow),
+            MaxRecords = 1000
+        };
+        
+        var result = await orderService.GetOrdersAsync(range, 0, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+        Assert.NotEmpty(result.Value);
+    }
+
+    [IntegrationFact]
+    public async Task UpdateOrderStatusAsync_ShouldReturn_ResultWithSuccess()
+    {
+        var result = await orderService.UpdateOrderStatusAsync(1, OrderStatus.Pending, fixture.CancellationToken);
+
+        Assert.True(result.IsSuccess);
+    }
+
+    [IntegrationFact]
+    public async Task AddShippingToOrderAsync_ShouldReturn_ResultWithSuccess()
+    {
+
+    }
+
+    [IntegrationFact]
+    public async Task UpdateShippingStatusAsync_ShouldReturn_ResultWithSuccess()
+    {
+
+    }
+
+    [IntegrationFact]
+    public async Task GetShippingByOrderIdAsync_ShouldReturn_ResultWithShipping()
+    {
+
+    }
+
+    [IntegrationFact]
+    public async Task RemoveShippingFromOrderAsync_ShouldReturn_ResultWithSuccess()
+    {
+
+    }
+
+    [IntegrationFact]
+    public async Task UpdateShippingTrackingNumberAsync_ShouldReturn_ResultWithSuccess()
+    {
+
+    }
+
+    [IntegrationFact]
+    public async Task CreateShippingProviderAsync_ShouldReturn_ResultWithSuccess()
+    {
+
+    }
+
+    [IntegrationFact]
+    public async Task GetShippingProvidersAsync_ShouldReturn_ResultWithShippingProviderList()
+    {
+
+    }
+
+    [IntegrationFact]
+    public async Task GetShippingProviderAsync_ShouldReturn_ResultWithShippingProvider()
+    {
+
+    }
+
+    [IntegrationFact]
+    public async Task UpdateShippingProviderAsync_ShouldReturn_ResultWithSuccess()
+    {
+
+    }
+}

LiteCharms.Features.MidrandBooks.Tests/PageServiceFeatureTests.cs

@@ -0,0 +1,63 @@
+using LiteCharms.Features.MidrandBooks.Pages;
+using LiteCharms.Features.MidrandBooks.Tests.Common;
+
+namespace LiteCharms.Features.MidrandBooks.Tests;
+
+public class PageServiceFeatureTests(Fixture fixture) : IClassFixture<Fixture>
+{
+    private readonly PageService pageService = fixture.Services.GetRequiredService<PageService>();
+
+    [IntegrationFact]
+    public async Task CreatePageAsync_ShouldReturn_ResultWithPageId()
+    {
+
+    }
+
+    [IntegrationFact]
+    public async Task GetPagesAsync_ByBookId_ShouldReturn_ResultWithPageList()
+    {
+
+    }
+
+    [IntegrationFact]
+    public async Task GetPageAsync_ShouldReturn_ResultWithPage()
+    {
+
+    }
+
+    [IntegrationFact]
+    public async Task GetPageByNumberAsync_ById_And_BookPageNumber_ShouldReturn_ResultWithPage()
+    {
+
+    }
+
+    [IntegrationFact]
+    public async Task UpdatePageAsync_ShouldReturn_ResultWithSuccess()
+    {
+
+    }
+
+    [IntegrationFact]
+    public async Task DeletePageAsync_ShouldReturn_ResultWithSuccess()
+    {
+
+    }
+
+    [IntegrationFact]
+    public async Task DeleteByPageTypeAsync_ShouldReturn_ResultWithSuccess()
+    {
+
+    }
+
+    [IntegrationFact]
+    public async Task DeleteAllAsync_ShouldReturn_ResultWithSuccess()
+    {
+
+    }
+
+    [IntegrationFact]
+    public async Task UpdatePageStatusAsync_ShouldReturn_ResultWithSuccess()
+    {
+
+    }
+}

LiteCharms.Features.MidrandBooks.Tests/ProductServiceFeatureTests.cs

@@ -1,10 +1,11 @@
 using LiteCharms.Features.MidrandBooks.Products;
 using LiteCharms.Features.MidrandBooks.Products.Models;
+using LiteCharms.Features.MidrandBooks.Tests.Common;
 using LiteCharms.Features.Models;
 
 namespace LiteCharms.Features.MidrandBooks.Tests;
 
-public class ProductServiceFeatureTest(Fixture fixture, ITestOutputHelper output) : IClassFixture<Fixture>
+public class ProductServiceFeatureTests(Fixture fixture, ITestOutputHelper output) : IClassFixture<Fixture>
 {
     private readonly ProductService productService = fixture.Services.GetRequiredService<ProductService>();
 

LiteCharms.Features.MidrandBooks/AuthorBooks/BooksService.cs

@@ -7,23 +7,21 @@ namespace LiteCharms.Features.MidrandBooks.AuthorBooks;
 
 public sealed class BooksService(IDbContextFactory<MidrandBooksDbContext> contextFactory) : IService
 {
-    public async ValueTask<Result> UpdateBookStatusAsync(long bookId, bool isEnabled, CancellationToken cancellationToken)
+    public async ValueTask<Result> UpdateBookStatusAsync(long bookId, bool isEnabled, CancellationToken cancellationToken = default)
     {
         try
         {
             await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
-            var book = await context.Books.FirstOrDefaultAsync(b => b.Id == bookId, cancellationToken);
+            var rowsUpdated = await context.Books
+                .Where(b => b.Id == bookId)
+                .ExecuteUpdateAsync(setters => setters
+                    .SetProperty(b => b.Enabled, isEnabled)
+                    .SetProperty(b => b.UpdatedAt, DateTime.UtcNow), cancellationToken);
 
-            if (book is null)
+            return rowsUpdated > 0
-                return Result.Fail(new Error($"Book with ID {bookId} not found"));
-
-            book.UpdatedAt = DateTime.UtcNow;
-            book.Enabled = isEnabled;
-
-            return await context.SaveChangesAsync(cancellationToken) > 0
                 ? Result.Ok()
-                : Result.Fail(new Error($"Failed to change status of book with ID {bookId}"));
+                : Result.Fail(new Error($"Book with ID {bookId} not found"));
         }
         catch (Exception ex)
         {
@@ -45,8 +43,9 @@ public sealed class BooksService(IDbContextFactory<MidrandBooksDbContext> contex
 
             var book = context.Books.Add(new Entities.AuthorBook
             {
+                CreatedAt = DateTime.UtcNow,
                 AuthorId = authorId,
-                ProductId = productId,
+                ProductId = productId                
             });
 
             return await context.SaveChangesAsync(cancellationToken) > 0
@@ -68,7 +67,8 @@ public sealed class BooksService(IDbContextFactory<MidrandBooksDbContext> contex
             var book = await context.Books
                 .AsNoTracking()
                 .Include(b => b.Author)
-                .Include(b => b.Product!.Price)
+                .Include(b => b.Product)
+                    .ThenInclude(b => b!.Prices)
                 .Include(b => b.Pages)
                 .FirstOrDefaultAsync(b => b.Id == bookId, cancellationToken);
 
@@ -86,7 +86,7 @@ public sealed class BooksService(IDbContextFactory<MidrandBooksDbContext> contex
     {
         try
         {
-            using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+            await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
             if(!await context.Authors.AnyAsync(a => a.Id == authorId, cancellationToken))
                 return Result.Fail<AuthorBook[]>(new Error($"Author with ID {authorId} not found"));
@@ -94,7 +94,8 @@ public sealed class BooksService(IDbContextFactory<MidrandBooksDbContext> contex
             var books = await context.Books
                 .AsNoTracking()
                 .Include(b => b.Author)
-                .Include(b => b.Product!.Price)
+                .Include(b => b.Product)
+                    .ThenInclude(b => b.Prices)
                 .OrderByDescending(b => b.CreatedAt)
                 .Where(b => b.AuthorId == authorId)
                 .ToListAsync(cancellationToken);
@@ -118,9 +119,10 @@ public sealed class BooksService(IDbContextFactory<MidrandBooksDbContext> contex
             var books = await context.Books
                 .AsNoTracking()
                 .Include(b => b.Author)
-                .Include(b => b.Product!.Price)
+                .Include(b => b.Product)
+                    .ThenInclude(b => b!.Prices)
                 .Include(b => b.Pages)
-                .Where(b => b.Enabled && b.Product!.Enabled && b.Author.Enabled)
+                .Where(b => b.Enabled && b.Product!.Enabled && b.Author!.Enabled)
                 .OrderByDescending(b => b.Ranking)
                     .ThenByDescending(b => b.Ranking)
                     .ThenByDescending(b => b.CreatedAt)

LiteCharms.Features.MidrandBooks/AuthorBooks/Entities/AuthorBook.cs

@@ -6,7 +6,7 @@ namespace LiteCharms.Features.MidrandBooks.AuthorBooks.Entities;
 
 public class AuthorBook : Models.AuthorBook
 {
-    public virtual Author Author { get; set; } = new();
+    public virtual Author? Author { get; set; }
 
     public new virtual Product? Product { get; set; }
 

LiteCharms.Features.MidrandBooks/Authors/AuthorService.cs

@@ -1,5 +1,4 @@
 using LiteCharms.Features.MidrandBooks.Abstractions;
-using LiteCharms.Features.MidrandBooks.AuthorBooks.Models;
 using LiteCharms.Features.MidrandBooks.Authors.Models;
 using LiteCharms.Features.MidrandBooks.Extensions;
 using LiteCharms.Features.MidrandBooks.Postgres;
@@ -9,53 +8,21 @@ namespace LiteCharms.Features.MidrandBooks.Authors;
 
 public sealed class AuthorService(IDbContextFactory<MidrandBooksDbContext> contextFactory) : IService
 {
-    public async ValueTask<Result<AuthorBook[]>> GetAuthorBooksAsync(long authorId, CancellationToken cancellationToken)
+    public async ValueTask<Result> UpdateAuthorStatusAsync(long authorId, bool isEnabled, CancellationToken cancellationToken = default)
     {
         try
         {
             await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
-            var author = await context.Authors.FirstOrDefaultAsync(a => a.Id == authorId, cancellationToken);
+            var rowsUpdated = await context.Authors
+                .Where(a => a.Id == authorId)
+                .ExecuteUpdateAsync(setters => setters
+                    .SetProperty(a => a.Enabled, isEnabled)
+                    .SetProperty(a => a.UpdatedAt, DateTime.UtcNow), cancellationToken);
 
-            if (author is null)
+            return rowsUpdated > 0
-                return Result.Fail<AuthorBook[]>(new Error($"Author with ID {authorId} not found"));
-
-            var books = await context.Books
-                .AsNoTracking()
-                .Include(b => b.Author)
-                .Include(b => b.Product!.Price)
-                .OrderByDescending(b => b.CreatedAt)
-                .Where(p => p.AuthorId == authorId)
-                .AsSplitQuery()                
-                .ToArrayAsync(cancellationToken);
-
-            return books?.Length > 0
-                ? Result.Ok(books.Select(b => b.ToModel()).ToArray())
-                : Result.Fail<AuthorBook[]>(new Error($"No books found for author with ID {authorId}"));
-        }
-        catch (Exception ex)
-        {
-            return Result.Fail<AuthorBook[]>(new Error(ex.Message).CausedBy(ex));
-        }
-    }
-
-    public async ValueTask<Result> UpdateAuthorStatusAsync(long authorId, bool isEnabled, CancellationToken cancellationToken)
-    {
-        try
-        {
-            await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
-
-            var author = await context.Authors.FirstOrDefaultAsync(a => a.Id == authorId, cancellationToken);
-
-            if (author is null)
-                return Result.Fail(new Error($"Author with ID {authorId} not found"));
-
-            author.UpdatedAt = DateTime.UtcNow;
-            author.Enabled = isEnabled;
-
-            return await context.SaveChangesAsync(cancellationToken) > 0
                 ? Result.Ok()
-                : Result.Fail(new Error($"Failed to change status of author with ID {authorId}"));
+                : Result.Fail(new Error($"Author with ID {authorId} not found"));
         }
         catch (Exception ex)
         {
@@ -81,12 +48,12 @@ public sealed class AuthorService(IDbContextFactory<MidrandBooksDbContext> conte
         }
     }
 
-    public async ValueTask<Result<Author[]>> GetAuthors(DateRange range, CancellationToken cancellationToken)
+    public async ValueTask<Result<Author[]>> GetAuthorsAsync(DateRange range, CancellationToken cancellationToken = default)
     {
         try
         {
-            var fromDate = range.From.ToDateTime(TimeOnly.MinValue);
+            var fromDate = range.From.ToDateTime(TimeOnly.MinValue, DateTimeKind.Utc);
-            var toDate = range.To.ToDateTime(TimeOnly.MaxValue);
+            var toDate = range.To.ToDateTime(TimeOnly.MaxValue, DateTimeKind.Utc);
 
             await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
@@ -107,18 +74,12 @@ public sealed class AuthorService(IDbContextFactory<MidrandBooksDbContext> conte
         }
     }
 
-    public async ValueTask<Result> UpdateAuthorAsync(long authorId, UpdateAuthor request, CancellationToken cancellationToken)
+    public async ValueTask<Result> UpdateAuthorAsync(long authorId, UpdateAuthor request, CancellationToken cancellationToken = default)
     {
         try
         {
             await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
-            if (await context.Authors.AnyAsync(a => a.Name == request.Name && a.LastName == request.LastName, cancellationToken))
-                return Result.Fail(new Error($"An author with the name {request.Name} {request.LastName} already exists"));
-
-            if (await context.Authors.AnyAsync(a => a.Email == request.Email, cancellationToken))
-                return Result.Fail(new Error($"An author with the email {request.Email} already exists"));
-
             var author = await context.Authors.FirstOrDefaultAsync(a => a.Id == authorId, cancellationToken);
 
             if (author is null)
@@ -151,12 +112,12 @@ public sealed class AuthorService(IDbContextFactory<MidrandBooksDbContext> conte
     {
         try
         {
-            using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+            await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
-            if(await context.Authors.AnyAsync(a => a.Name == request.Name && a.LastName == request.LastName, cancellationToken))
+            if (await context.Authors.AnyAsync(a => a.Name == request.Name && a.LastName == request.LastName, cancellationToken))
                 return Result.Fail<long>(new Error($"An author with the name {request.Name} {request.LastName} already exists"));
 
-            if(await context.Authors.AnyAsync(a => a.Email == request.Email, cancellationToken))
+            if (await context.Authors.AnyAsync(a => a.Email == request.Email, cancellationToken))
                 return Result.Fail<long>(new Error($"An author with the email {request.Email} already exists"));
 
             var newAuthor = context.Authors.Add(new Entities.Author

LiteCharms.Features.MidrandBooks/Authors/Models/Author.cs

@@ -30,7 +30,7 @@ public class Author
 
     public string? ThumbnailImageUrl { get; set; }
 
-    public SocialMedia[]? SocialMedia { get; set; }
+    public ICollection<SocialMedia>? SocialMedia { get; set; }
 
     public bool Enabled { get; set; }
 }

LiteCharms.Features.MidrandBooks/Customers/CustomerService.cs

@@ -13,7 +13,7 @@ public sealed class CustomerService(IDbContextFactory<MidrandBooksDbContext> con
         {
             await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
-            if (await context.Customers.AnyAsync(c => c.Email!.Equals(request.Email, StringComparison.OrdinalIgnoreCase), cancellationToken))
+            if (await context.Customers.AnyAsync(c => EF.Functions.ILike(c.Email!, $"%{request.Email}%"), cancellationToken))
                 return Result.Fail<long>(new Error($"Customer with email '{request.Email}' already exists."));
 
             var customer = context.Customers.Add(new Entities.Customer
@@ -46,7 +46,7 @@ public sealed class CustomerService(IDbContextFactory<MidrandBooksDbContext> con
             if (!await context.Customers.AnyAsync(c => c.Id == customerId, cancellationToken))
                 return Result.Fail<long>(new Error($"Customer with ID '{customerId}' does not exist."));
 
-            if (await context.Contacts.AnyAsync(cc => cc.CustomerId == customerId && cc.Email!.Equals(request.Email, StringComparison.OrdinalIgnoreCase), cancellationToken))
+            if (await context.Contacts.AnyAsync(cc => cc.CustomerId == customerId && EF.Functions.ILike(cc.Email!, $"%{request.Email}%"), cancellationToken))
                 return Result.Fail<long>(new Error($"Contact with email '{request.Email}' already exists for this customer."));
 
             var contact = context.Contacts.Add(new Entities.Contact
@@ -139,21 +139,19 @@ public sealed class CustomerService(IDbContextFactory<MidrandBooksDbContext> con
         {
             await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
-            var contact = await context.Contacts.FirstOrDefaultAsync(cc => cc.Id == contactId, cancellationToken);
+            var rowsUpdated = await context.Contacts
+                .Where(cc => cc.Id == contactId)
+                .ExecuteUpdateAsync(setters => setters
+                    .SetProperty(cc => cc.Name, request.Name)
+                    .SetProperty(cc => cc.LastName, request.LastName)
+                    .SetProperty(cc => cc.Email, request.Email)
+                    .SetProperty(cc => cc.Phone, request.Phone)
+                    .SetProperty(cc => cc.Type, request.Type)
+                    .SetProperty(cc => cc.UpdatedAt, DateTime.UtcNow), cancellationToken);
 
-            if (contact is null)
+            return rowsUpdated > 0
-                return Result.Fail(new Error($"Contact with ID '{contactId}' does not exist."));
-
-            contact.UpdatedAt = DateTime.UtcNow;
-            contact.Name = request.Name;
-            contact.LastName = request.LastName;
-            contact.Email = request.Email;
-            contact.Phone = request.Phone;
-            contact.Type = request.Type;
-
-            return await context.SaveChangesAsync(cancellationToken) > 0
                 ? Result.Ok()
-                : Result.Fail(new Error("Failed to update customer contact."));
+                : Result.Fail(new Error($"Contact with ID '{contactId}' does not exist."));
         }
         catch (Exception ex)
         {
@@ -167,25 +165,23 @@ public sealed class CustomerService(IDbContextFactory<MidrandBooksDbContext> con
         {
             await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
-            var address = await context.Addresses.FirstOrDefaultAsync(a => a.Id == addressId, cancellationToken);
+            var rowsUpdated = await context.Addresses
+                .Where(a => a.Id == addressId)
+                .ExecuteUpdateAsync(setters => setters
+                    .SetProperty(a => a.Street, request.Street)
+                    .SetProperty(a => a.City, request.City)
+                    .SetProperty(a => a.State, request.State)
+                    .SetProperty(a => a.PostalCode, request.PostalCode)
+                    .SetProperty(a => a.Country, request.Country)
+                    .SetProperty(a => a.Type, request.Type)
+                    .SetProperty(a => a.BuildingType, request.BuildingType)
+                    .SetProperty(a => a.IsPrimary, request.IsPrimary)
+                    .SetProperty(a => a.Name, request.Name)
+                    .SetProperty(a => a.UpdatedAt, DateTime.UtcNow), cancellationToken);
 
-            if (address is null)
+            return rowsUpdated > 0
-                return Result.Fail(new Error($"Address with ID '{addressId}' does not exist."));
-
-            address.UpdatedAt = DateTime.UtcNow;
-            address.Street = request.Street;
-            address.City = request.City;
-            address.State = request.State;
-            address.PostalCode = request.PostalCode;
-            address.Country = request.Country;
-            address.Type = request.Type;
-            address.BuildingType = request.BuildingType;
-            address.IsPrimary = request.IsPrimary;
-            address.Name = request.Name;
-
-            return await context.SaveChangesAsync(cancellationToken) > 0
                 ? Result.Ok()
-                : Result.Fail(new Error("Failed to update customer address."));
+                : Result.Fail(new Error($"Address with ID '{addressId}' does not exist."));
         }
         catch (Exception ex)
         {
@@ -199,17 +195,15 @@ public sealed class CustomerService(IDbContextFactory<MidrandBooksDbContext> con
         {
             await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
-            var customer = await context.Customers.FirstOrDefaultAsync(c => c.Id == customerId, cancellationToken);
+            var rowsUpdated = await context.Customers
+                .Where(c => c.Id == customerId)
+                .ExecuteUpdateAsync(setters => setters
+                    .SetProperty(c => c.Enabled, enabled)
+                    .SetProperty(c => c.UpdatedAt, DateTime.UtcNow), cancellationToken);
 
-            if (customer is null)
+            return rowsUpdated > 0
-                return Result.Fail(new Error($"Customer with ID '{customerId}' does not exist."));
-
-            customer.Enabled = enabled;
-            customer.UpdatedAt = DateTime.UtcNow;
-
-            return await context.SaveChangesAsync(cancellationToken) > 0
                 ? Result.Ok()
-                : Result.Fail(new Error("Failed to update customer status."));
+                : Result.Fail(new Error($"Customer with ID '{customerId}' does not exist."));
         }
         catch (Exception ex)
         {
@@ -223,18 +217,16 @@ public sealed class CustomerService(IDbContextFactory<MidrandBooksDbContext> con
         {
             await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
-            var contact = await context.Contacts.FirstOrDefaultAsync(cc => cc.Id == contactId, cancellationToken);
+            var rowsUpdated = await context.Contacts
+                .Where(cc => cc.Id == contactId)
+                .ExecuteUpdateAsync(setters => setters
+                    .SetProperty(cc => cc.Enabled, enabled)
+                    .SetProperty(cc => cc.IsPrimary, isPrimary)
+                    .SetProperty(cc => cc.UpdatedAt, DateTime.UtcNow), cancellationToken);
 
-            if (contact is null)
+            return rowsUpdated > 0
-                return Result.Fail(new Error($"Contact with ID '{contactId}' does not exist."));
-
-            contact.Enabled = enabled;
-            contact.IsPrimary = isPrimary;
-            contact.UpdatedAt = DateTime.UtcNow;
-
-            return await context.SaveChangesAsync(cancellationToken) > 0
                 ? Result.Ok()
-                : Result.Fail(new Error("Failed to update customer contact status."));
+                : Result.Fail(new Error($"Contact with ID '{contactId}' does not exist."));
         }
         catch (Exception ex)
         {
@@ -248,18 +240,16 @@ public sealed class CustomerService(IDbContextFactory<MidrandBooksDbContext> con
         {
             await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
-            var address = await context.Addresses.FirstOrDefaultAsync(a => a.Id == addressId, cancellationToken);
+            var rowsUpdated = await context.Addresses
+                .Where(a => a.Id == addressId)
+                .ExecuteUpdateAsync(setters => setters
+                    .SetProperty(a => a.Enabled, enabled)
+                    .SetProperty(a => a.IsPrimary, isPrimary)
+                    .SetProperty(a => a.UpdatedAt, DateTime.UtcNow), cancellationToken);
 
-            if (address is null)
+            return rowsUpdated > 0
-                return Result.Fail(new Error($"Address with ID '{addressId}' does not exist."));
-
-            address.Enabled = enabled;
-            address.IsPrimary = isPrimary;
-            address.UpdatedAt = DateTime.UtcNow;
-
-            return await context.SaveChangesAsync(cancellationToken) > 0
                 ? Result.Ok()
-                : Result.Fail(new Error("Failed to update customer address status."));
+                : Result.Fail(new Error($"Address with ID '{addressId}' does not exist."));
         }
         catch (Exception ex)
         {

LiteCharms.Features.MidrandBooks/Customers/Models/Customer.cs

@@ -20,7 +20,7 @@ public class Customer
 
     public string? Phone { get; set; }
 
-    public SocialMedia[]? SocialMedia { get; set; }
+    public ICollection<SocialMedia>? SocialMedia { get; set; }
 
     public bool Enabled { get; set; }
 }

LiteCharms.Features.MidrandBooks/Customers/Models/Records.cs

@@ -14,7 +14,7 @@ public record CreateCustomer
 
     public string? Phone { get; set; }
 
-    public SocialMedia[]? SocialMedia { get; set; }
+    public ICollection<SocialMedia>? SocialMedia { get; set; }
 }
 
 public sealed record UpdateCustomer : CreateCustomer;

LiteCharms.Features.MidrandBooks/Orders/Models/Records.cs

@@ -1,6 +1,6 @@
 namespace LiteCharms.Features.MidrandBooks.Orders.Models;
 
-public sealed record CreateOrder(long CustomerId, decimal TotalPrice, string? Notes);
+public sealed record CreateOrder(decimal TotalPrice, string? Notes);
 
 public sealed record CreateOrderItem(long AuthorBookId, long ProductPriceId, int Quantity);
 

LiteCharms.Features.MidrandBooks/Orders/OrderService.cs

@@ -49,6 +49,17 @@ public sealed class OrderService(IDbContextFactory<MidrandBooksDbContext> contex
             if (!await context.Prices.AnyAsync(pp => pp.Id == request.ProductPriceId, cancellationToken))
                 return Result.Fail<long>("Product price not found.");
 
+            var existingItem = await context.OrderItems.FirstOrDefaultAsync(i => i.ProductPriceId == request.ProductPriceId && i.OrderId == orderId, cancellationToken);
+
+            if(existingItem is not null)
+            {
+                existingItem.Quantity += request.Quantity;
+
+                return await context.SaveChangesAsync(cancellationToken) > 0
+                    ? Result.Ok(existingItem.Id)
+                    : Result.Fail<long>("Update existing order item.");
+            }
+
             var orderItem = context.OrderItems.Add(new Entities.OrderItem
             {
                 OrderId = orderId,
@@ -78,9 +89,6 @@ public sealed class OrderService(IDbContextFactory<MidrandBooksDbContext> contex
 
             if (!await context.Orders.AnyAsync(o => o.Id == orderId, cancellationToken))
                 return Result.Fail("Order not found.");
-                        
-            var existingItems = context.OrderItems.Where(oi => oi.OrderId == orderId);
-            context.OrderItems.RemoveRange(existingItems);
 
             foreach (var item in items)
             {
@@ -90,18 +98,23 @@ public sealed class OrderService(IDbContextFactory<MidrandBooksDbContext> contex
                 if (!await context.Prices.AnyAsync(pp => pp.Id == item.ProductPriceId, cancellationToken))
                     return Result.Fail($"Product price with ID {item.ProductPriceId} not found.");
 
-                context.OrderItems.Add(new Entities.OrderItem
+                var existingItem = await context.OrderItems.FirstOrDefaultAsync(i => i.ProductPriceId == item.ProductPriceId && i.OrderId == orderId, cancellationToken);
-                {
+
-                    OrderId = orderId,
+                if (existingItem is not null)
-                    AuthorBookId = item.AuthorBookId,
+                    existingItem.Quantity += item.Quantity;
-                    ProductPriceId = item.ProductPriceId,
+                else
-                    Quantity = item.Quantity
+                    context.OrderItems.Add(new Entities.OrderItem
-                });
+                    {
+                        OrderId = orderId,
+                        AuthorBookId = item.AuthorBookId,
+                        ProductPriceId = item.ProductPriceId,
+                        Quantity = item.Quantity
+                    });
+
+                await context.SaveChangesAsync(cancellationToken);
             }
 
-            return await context.SaveChangesAsync(cancellationToken) > 0
+            return Result.Ok();
-                ? Result.Ok()
-                : Result.Fail("Failed to add items to order.");
         }
         catch (Exception ex)
         {
@@ -115,16 +128,13 @@ public sealed class OrderService(IDbContextFactory<MidrandBooksDbContext> contex
         {
             await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
-            var orderItem = await context.OrderItems.FirstOrDefaultAsync(oi => oi.Id == orderItemId && oi.OrderId == orderId, cancellationToken);
+            var rowsDeleted = await context.OrderItems
+                .Where(oi => oi.Id == orderItemId && oi.OrderId == orderId)
+                .ExecuteDeleteAsync(cancellationToken);
 
-            if (orderItem is null)
+            return rowsDeleted > 0
-                return Result.Fail("Order item not found.");
-
-            context.OrderItems.Remove(orderItem);
-
-            return await context.SaveChangesAsync(cancellationToken) > 0
                 ? Result.Ok()
-                : Result.Fail("Failed to remove item from order.");
+                : Result.Fail("Order item not found or failed to remove.");
         }
         catch (Exception ex)
         {
@@ -132,15 +142,14 @@ public sealed class OrderService(IDbContextFactory<MidrandBooksDbContext> contex
         }
     }
 
-    public async ValueTask<Result> ClearOrderItemasAsync(long orderId, CancellationToken cancellationToken = default)
+    public async ValueTask<Result> ClearOrderItemsAsync(long orderId, CancellationToken cancellationToken = default)
     {
         try
         {
             await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
-            var orderItems = context.OrderItems.Where(oi => oi.OrderId == orderId);
+            var deletedItems = await context.OrderItems.Where(oi => oi.OrderId == orderId)
-
+                .ExecuteDeleteAsync(cancellationToken);
-            context.OrderItems.RemoveRange(orderItems);
 
             return await context.SaveChangesAsync(cancellationToken) > 0
                 ? Result.Ok()
@@ -199,12 +208,15 @@ public sealed class OrderService(IDbContextFactory<MidrandBooksDbContext> contex
     {
         try
         {
+            var fromDate = range.From.ToDateTime(TimeOnly.MinValue, DateTimeKind.Utc);
+            var toDate = range.To.ToDateTime(TimeOnly.MaxValue, DateTimeKind.Utc);
+
             await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
             var orders = await context.Orders
                 .AsNoTracking()
-                .Where(o => o.CreatedAt >= range.From.ToDateTime(TimeOnly.MinValue) && o.CreatedAt <= range.To.ToDateTime(TimeOnly.MaxValue))
+                .Where(o => o.CreatedAt >= fromDate && o.CreatedAt <= toDate)
-                .Skip(index * range.MaxRecords)
+                .Skip(index).Take(range.MaxRecords)
                 .ToListAsync(cancellationToken);
 
             return Result.Ok(orders.Select(o => o.ToModel()).ToArray());
@@ -221,17 +233,15 @@ public sealed class OrderService(IDbContextFactory<MidrandBooksDbContext> contex
         {
             await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
-            var order = await context.Orders.FirstOrDefaultAsync(o => o.Id == orderId, cancellationToken);
+            var rowsUpdated = await context.Orders
+                .Where(o => o.Id == orderId)
+                .ExecuteUpdateAsync(setters => setters
+                    .SetProperty(o => o.Status, newStatus)
+                    .SetProperty(o => o.UpdatedAt, DateTime.UtcNow), cancellationToken);
 
-            if (order is null)
+            return rowsUpdated > 0
-                return Result.Fail("Order not found.");
-
-            order.UpdatedAt = DateTime.UtcNow;
-            order.Status = newStatus;
-
-            return await context.SaveChangesAsync(cancellationToken) > 0
                 ? Result.Ok()
-                : Result.Fail("Failed to update order status.");
+                : Result.Fail("Order not found or status update failed.");
         }
         catch (Exception ex)
         {
@@ -282,17 +292,16 @@ public sealed class OrderService(IDbContextFactory<MidrandBooksDbContext> contex
         {
             await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
-            var shipping = await context.Shippings.FirstOrDefaultAsync(s => s.OrderId == orderId, cancellationToken);
+            var rowsUpdated = await context.Shippings
+                .Where(s => s.OrderId == orderId)
+                .ExecuteUpdateAsync(setters => setters
+                    .SetProperty(s => s.Status, newStatus)
+                    .SetProperty(s => s.UpdatedAt, DateTime.UtcNow),
+                    cancellationToken);
 
-            if (shipping is null)
+            return rowsUpdated > 0
-                return Result.Fail("Shipping not found for this order.");
-
-            shipping.UpdatedAt = DateTime.UtcNow;
-            shipping.Status = newStatus;
-
-            return await context.SaveChangesAsync(cancellationToken) > 0
                 ? Result.Ok()
-                : Result.Fail("Failed to update shipping status.");
+                : Result.Fail("Shipping not found for this order or status update failed.");
         }
         catch (Exception ex)
         {
@@ -325,21 +334,14 @@ public sealed class OrderService(IDbContextFactory<MidrandBooksDbContext> contex
         try
         {
             await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+                        
+            var rowsDeleted = await context.Shippings
+                .Where(s => s.Id == shippingId && s.OrderId == orderId)
+                .ExecuteDeleteAsync(cancellationToken);
 
-            if(!await context.Orders.AnyAsync(o => o.Id == orderId, cancellationToken))
+            return rowsDeleted > 0
-                return Result.Fail("Order not found.");
-
-            var shipping = await context.Shippings.AsNoTracking()
-                .FirstOrDefaultAsync(s => s.OrderId == orderId && s.Id == shippingId, cancellationToken);
-
-            if (shipping is null)
-                return Result.Fail("Shipping not found for this order.");
-
-            context.Shippings.Remove(shipping);
-
-            return await context.SaveChangesAsync(cancellationToken) > 0
                 ? Result.Ok()
-                : Result.Fail("Failed to remove shipping from order.");
+                : Result.Fail("Shipping record not found for this order.");
         }
         catch (Exception ex)
         {
@@ -353,17 +355,15 @@ public sealed class OrderService(IDbContextFactory<MidrandBooksDbContext> contex
         {
             await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
-            var shipping = await context.Shippings.FirstOrDefaultAsync(s => s.OrderId == orderId && s.Id == shippingId, cancellationToken);
+            var rowsUpdated = await context.Shippings
+                .Where(s => s.Id == shippingId && s.OrderId == orderId)
+                .ExecuteUpdateAsync(setters => setters
+                    .SetProperty(s => s.TrackingNumber, trackingNumber)
+                    .SetProperty(s => s.UpdatedAt, DateTime.UtcNow), cancellationToken);
 
-            if (shipping is null)
+            return rowsUpdated > 0
-                return Result.Fail("Shipping not found for this order.");
-
-            shipping.UpdatedAt = DateTime.UtcNow;
-            shipping.TrackingNumber = trackingNumber;
-
-            return await context.SaveChangesAsync(cancellationToken) > 0
                 ? Result.Ok()
-                : Result.Fail("Failed to update shipping tracking number.");
+                : Result.Fail("Shipping record not found for this order.");
         }
         catch (Exception ex)
         {
@@ -440,24 +440,22 @@ public sealed class OrderService(IDbContextFactory<MidrandBooksDbContext> contex
         {
             await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
-            var provider = await context.ShippingProviders.FirstOrDefaultAsync(sp => sp.Id == request.ProviderId, cancellationToken);
+            var rowsUpdated = await context.ShippingProviders
+                .Where(sp => sp.Id == request.ProviderId)
+                .ExecuteUpdateAsync(setters => setters
+                    .SetProperty(sp => sp.Name, request.Name)
+                    .SetProperty(sp => sp.Price, request.Price)
+                    .SetProperty(sp => sp.TrackingUrl, request.TrackingUrl)
+                    .SetProperty(sp => sp.Enabled, request.Enabled)
+                    .SetProperty(sp => sp.UpdatedAt, DateTime.UtcNow), cancellationToken);
 
-            if (provider is null)
+            return rowsUpdated > 0
-                return Result.Fail("Shipping provider not found.");
-
-            provider.UpdatedAt = DateTime.UtcNow;
-            provider.Enabled = request.Enabled;
-            provider.Name = request.Name;
-            provider.Price = request.Price;
-            provider.TrackingUrl = request.TrackingUrl;
-
-            return await context.SaveChangesAsync(cancellationToken) > 0
                 ? Result.Ok()
-                : Result.Fail("Failed to update shipping provider status.");
+                : Result.Fail("Shipping provider not found.");
         }
         catch (Exception ex)
         {
             return Result.Fail(new Error(ex.Message).CausedBy(ex));
         }
-    }       
+    }
 }

LiteCharms.Features.MidrandBooks/Pages/Models/BookPage.cs

@@ -22,7 +22,7 @@ public class BookPage
 
     public string[]? Notes { get; set; }
 
-    public PageReference[]? References { get; set; }
+    public ICollection<PageReference>? References { get; set; }
 
     public bool Enabled { get; set; }
 }

LiteCharms.Features.MidrandBooks/Pages/Models/CreateBookPage.cs

@@ -14,5 +14,5 @@ public class CreateBookPage
 
     public string[]? Notes { get; set; }
 
-    public PageReference[]? References { get; set; }
+    public ICollection<PageReference>? References { get; set; }
 }

LiteCharms.Features.MidrandBooks/Pages/PageService.cs

@@ -13,19 +13,13 @@ public sealed class PageService(IDbContextFactory<MidrandBooksDbContext> context
         {
             await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
-            if (!await context.Books.AnyAsync(b => b.Id == authorBookId, cancellationToken))
+            var rowsDeleted = await context.Pages
-                return Result.Fail("Book not found");
+                .Where(p => p.AuthorBookId == authorBookId)
+                .ExecuteDeleteAsync(cancellationToken);
 
-            var pages = await context.Pages.Where(p => p.AuthorBookId == authorBookId).ToListAsync(cancellationToken);
+            return rowsDeleted > 0
-
+                ? Result.Ok()
-            if (pages.Count == 0)
+                : Result.Fail("No pages found for the specified book");
-                return Result.Fail("No pages found for the specified book");
-
-            context.Pages.RemoveRange(pages);
-
-            await context.SaveChangesAsync(cancellationToken);
-
-            return Result.Ok();
         }
         catch (Exception ex)
         {
@@ -39,16 +33,13 @@ public sealed class PageService(IDbContextFactory<MidrandBooksDbContext> context
         {
             await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
-            var page = await context.Pages.FirstOrDefaultAsync(p => p.AuthorBookId == authorBookId && p.Number == pageNumber && p.Type == pageType, cancellationToken);
+            var rowsDeleted = await context.Pages
+                .Where(p => p.AuthorBookId == authorBookId && p.Number == pageNumber && p.Type == pageType)
+                .ExecuteDeleteAsync(cancellationToken);
 
-            if (page is null)
+            return rowsDeleted > 0
-                return Result.Fail("Page not found");
-
-            context.Pages.Remove(page);
-
-            return await context.SaveChangesAsync(cancellationToken) > 0
                 ? Result.Ok()
-                : Result.Fail("Failed to delete page");
+                : Result.Fail("Page not found");
         }
         catch (Exception ex)
         {
@@ -62,17 +53,15 @@ public sealed class PageService(IDbContextFactory<MidrandBooksDbContext> context
         {
             await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
-            var page = await context.Pages.FirstOrDefaultAsync(p => p.Id == bookPageId, cancellationToken);
+            var rowsUpdated = await context.Pages
+                .Where(p => p.Id == bookPageId)
+                .ExecuteUpdateAsync(setters => setters
+                    .SetProperty(p => p.Enabled, enabled)
+                    .SetProperty(p => p.UpdatedAt, DateTime.UtcNow), cancellationToken);
 
-            if (page is null)
+            return rowsUpdated > 0
-                return Result.Fail("Page not found");
-
-            page.UpdatedAt = DateTime.UtcNow;
-            page.Enabled = enabled;
-
-            return await context.SaveChangesAsync(cancellationToken) > 0
                 ? Result.Ok()
-                : Result.Fail("Failed to update page status");
+                : Result.Fail("Page not found");
         }
         catch (Exception ex)
         {
@@ -86,16 +75,13 @@ public sealed class PageService(IDbContextFactory<MidrandBooksDbContext> context
         {
             await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
-            var page = await context.Pages.FirstOrDefaultAsync(p => p.Id == bookPageId, cancellationToken);
+            var rowsDeleted = await context.Pages
+                .Where(p => p.Id == bookPageId)
+                .ExecuteDeleteAsync(cancellationToken);
 
-            if (page is null)
+            return rowsDeleted > 0
-                return Result.Fail("Page not found");
-
-            context.Pages.Remove(page);
-
-            return await context.SaveChangesAsync(cancellationToken) > 0
                 ? Result.Ok()
-                : Result.Fail("Failed to delete page");
+                : Result.Fail("Page not found");
         }
         catch (Exception ex)
         {
@@ -109,22 +95,20 @@ public sealed class PageService(IDbContextFactory<MidrandBooksDbContext> context
         {
             await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
-            var page = await context.Pages.FirstOrDefaultAsync(p => p.Id == bookPageId, cancellationToken);
+            var rowsUpdated = await context.Pages
+                .Where(p => p.Id == bookPageId)
+                .ExecuteUpdateAsync(setters => setters
+                    .SetProperty(p => p.Type, request.Type)
+                    .SetProperty(p => p.ContentType, request.ContentType)
+                    .SetProperty(p => p.Number, request.Number)
+                    .SetProperty(p => p.Content, request.Content)
+                    .SetProperty(p => p.Notes, request.Notes)
+                    .SetProperty(p => p.References, request.References)
+                    .SetProperty(p => p.UpdatedAt, DateTime.UtcNow), cancellationToken);
 
-            if (page is null)
+            return rowsUpdated > 0
-                return Result.Fail("Page not found");
-            
-            page.UpdatedAt = DateTime.UtcNow;
-            page.Type = request.Type;
-            page.ContentType = request.ContentType;
-            page.Number = request.Number;
-            page.Content = request.Content;
-            page.Notes = request.Notes;
-            page.References = request.References;
-
-            return await context.SaveChangesAsync(cancellationToken) > 0
                 ? Result.Ok()
-                : Result.Fail("Failed to update page");
+                : Result.Fail("Page not found");
         }
         catch (Exception ex)
         {

LiteCharms.Features.MidrandBooks/Postgres/Migrations/MidrandBooksDbContextModelSnapshot.cs

@@ -57,7 +57,7 @@ namespace LiteCharms.Features.MidrandBooks.Postgres.Migrations
 
                     b.HasIndex("ProductId");
 
-                    b.ToTable("Books");
+                    b.ToTable("Books", (string)null);
                 });
 
             modelBuilder.Entity("LiteCharms.Features.MidrandBooks.Authors.Entities.Author", b =>
@@ -454,7 +454,7 @@ namespace LiteCharms.Features.MidrandBooks.Postgres.Migrations
 
                     b.HasKey("Id");
 
-                    b.ToTable("ShippingProviders");
+                    b.ToTable("ShippingProviders", (string)null);
                 });
 
             modelBuilder.Entity("LiteCharms.Features.MidrandBooks.Pages.Entities.BookPage", b =>
@@ -677,7 +677,7 @@ namespace LiteCharms.Features.MidrandBooks.Postgres.Migrations
                     b.HasIndex("ProductId")
                         .IsUnique();
 
-                    b.ToTable("ProductPrice");
+                    b.ToTable("ProductPrice", (string)null);
                 });
 
             modelBuilder.Entity("LiteCharms.Features.MidrandBooks.AuthorBooks.Entities.AuthorBook", b =>
@@ -718,7 +718,7 @@ namespace LiteCharms.Features.MidrandBooks.Postgres.Migrations
 
                             b1.HasKey("AuthorId", "__synthesizedOrdinal");
 
-                            b1.ToTable("Authors");
+                            b1.ToTable("Authors", (string)null);
 
                             b1
                                 .ToJson("SocialMedia")
@@ -772,7 +772,7 @@ namespace LiteCharms.Features.MidrandBooks.Postgres.Migrations
 
                             b1.HasKey("CustomerId", "__synthesizedOrdinal");
 
-                            b1.ToTable("Customers");
+                            b1.ToTable("Customers", (string)null);
 
                             b1
                                 .ToJson("SocialMedia")
@@ -862,7 +862,7 @@ namespace LiteCharms.Features.MidrandBooks.Postgres.Migrations
 
                             b1.HasKey("BookPageId", "__synthesizedOrdinal");
 
-                            b1.ToTable("BookPages");
+                            b1.ToTable("BookPages", (string)null);
 
                             b1
                                 .ToJson("References")
@@ -904,7 +904,7 @@ namespace LiteCharms.Features.MidrandBooks.Postgres.Migrations
 
                             b1.HasKey("ProductId");
 
-                            b1.ToTable("Products");
+                            b1.ToTable("Products", (string)null);
 
                             b1
                                 .ToJson("Metadata")

LiteCharms.Features.MidrandBooks/Products/ProductService.cs

@@ -14,17 +14,15 @@ public sealed class ProductService(IDbContextFactory<MidrandBooksDbContext> cont
         {
             await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
-            var productPrice = await context.Prices.FirstOrDefaultAsync(p => p.Id == productPriceId, cancellationToken);
+            var rowsUpdated = await context.Prices
+                .Where(p => p.Id == productPriceId)
+                .ExecuteUpdateAsync(setters => setters
+                    .SetProperty(p => p.Enabled, isEnabled)
+                    .SetProperty(p => p.UpdatedAt, DateTime.UtcNow), cancellationToken);
 
-            if (productPrice is null)
+            return rowsUpdated > 0
-                return Result.Fail(new Error($"Product price with ID {productPriceId} not found"));
-
-            productPrice.UpdatedAt = DateTime.UtcNow;
-            productPrice.Enabled = isEnabled;
-
-            return await context.SaveChangesAsync(cancellationToken) > 0
                 ? Result.Ok()
-                : Result.Fail(new Error($"Failed to change status of product price with ID {productPriceId}"));
+                : Result.Fail(new Error($"Product price with ID {productPriceId} not found"));
         }
         catch (Exception ex)
         {
@@ -38,17 +36,15 @@ public sealed class ProductService(IDbContextFactory<MidrandBooksDbContext> cont
         {
             await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
-            var product = await context.Products.FirstOrDefaultAsync(p => p.Id == productId, cancellationToken);
+            var rowsUpdated = await context.Products
+                .Where(p => p.Id == productId)
+                .ExecuteUpdateAsync(setters => setters
+                    .SetProperty(p => p.Enabled, isEnabled)
+                    .SetProperty(p => p.UpdatedAt, DateTime.UtcNow), cancellationToken);
 
-            if (product is null)
+            return rowsUpdated > 0
-                return Result.Fail(new Error($"Product with ID {productId} not found"));
-
-            product.UpdatedAt = DateTime.UtcNow;
-            product.Enabled = isEnabled;
-
-            return await context.SaveChangesAsync(cancellationToken) > 0
                 ? Result.Ok()
-                : Result.Fail(new Error($"Failed to change status of product with ID {productId}"));
+                : Result.Fail(new Error($"Product with ID {productId} not found"));
         }
         catch (Exception ex)
         {