Stable multitenancy

PostFundManagement.Api/appsettings.json

@@ -20,8 +20,11 @@
   },
   "Logging": {
     "LogLevel": {
-      "Default": "Information",
-      "Microsoft.AspNetCore": "Warning"
+      "Default": "Warning",
+      "Quartz": "Error",
+      "Microsoft.AspNetCore": "Warning",
+      "Microsoft.EntityFrameworkCore.Database": "Error",
+      "Microsoft.EntityFrameworkCore.Update": "Error"
     }
   },
   "EmailProcessorCron": "0 */5 * * * ?",

PostFundManagement.Application/Abstractions/Services/ICommunicationsService.cs

@@ -7,12 +7,16 @@ namespace PostFundManagement.Application.Abstractions.Services;
 
 public interface ICommunicationsService
 {
+    [Log]
     [Audit]
     Task<Result<Invite>> SendInviteAsync(InviteRequest request, Guid userId, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Invite[]>> GetInvitesAsync(Pagination pagination, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Invite>> GetApplicantInviteAsync(Guid applicantUserId, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Invite[]>> GetApplicantInvitesAsync(Guid applicantUserId, CancellationToken cancellationToken = default);
 }

PostFundManagement.Application/Abstractions/Services/IEvidenceService.cs

@@ -7,32 +7,44 @@ namespace PostFundManagement.Application.Abstractions.Services;
 
 public interface IEvidenceService
 {
+    [Log]
     [Audit]
     Task<Result> CreateEvidenceAsync(Guid userId, IFormCollection form, IFormFile file, CancellationToken cancellationToken = default);
 
+    [Log]
     [Audit]
     Task<Result> RecordIndicatorActualAmountAsync(string indicatorIdHash, decimal amount, Guid userId, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Indicator[]>> GetIndicatorsAsync(Pagination pagination, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Evidence[]>> GetEvidenceFilesAsync(Pagination pagination, CancellationToken cancellationToken = default);
 
+    [Log]
     [Audit]
     Task<Result> CreateMilestoneAsync(CreateMilestoneRequest request, Guid userId, CancellationToken cancellationToken = default);
 
+    [Log]
     [Audit]
     Task<Result> CreateIndicatorAsync(CreateIndicatorRequest request, Guid userId, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Indicator>> GetIndicatorAsync(string indicatorId, CancellationToken cancellationToken);
 
+    [Log]
     Task<Result<Evidence>> GetEvidenceAsync(string evidenceId, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Evidence[]>> GetMilestoneEvidencesAsync(string milestoneIdHash, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Evidence[]>> GetProjectEvidencesAsync(string projectIdHash, CancellationToken cancellationToken = default);
 
+    [Log]
     [Audit]
     Task<Result> UpdateEvidenceAsync(UpdateEvidenceRequest request, Guid userId, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<string>> GetEvidenceUrlAsync(string evidenceIdHash, CancellationToken cancellationToken = default);
 }

PostFundManagement.Application/Abstractions/Services/IExecutionService.cs

@@ -7,26 +7,35 @@ namespace PostFundManagement.Application.Abstractions.Services;
 
 public interface IExecutionService
 {
+    [Log]
     Task<Result<Risk[]>> GetRisksAsync(Pagination pagination, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Disbursement[]>> GetDisbursementsAsync(Pagination pagination, CancellationToken cancellationToken = default);
 
+    [Log]
     [Audit]
     Task<Result> CreateRiskAsync(CreateRiskRequest request, Guid userId, CancellationToken cancellationToken = default);
 
+    [Log]
     [Audit]
     Task<Result> CreateDisbursementAsync(CreateDisbursementRequest request, Guid userId, CancellationToken cancellationToken = default);
 
+    [Log]
     [Audit]
     Task<Result> ApproveDisbursementAsync(string disbursementIdHash, Guid userId, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Disbursement>> GetDisbursementAsync(string disbursementIdHash, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Risk>> GetRiskAsync(string riskIdHash, CancellationToken cancellationToken = default);
 
+    [Log]
     [Audit]
     Task<Result> UpdateRiskAsync(UpdateRiskRequest request, CancellationToken cancellationToken = default);
 
+    [Log]
     [Audit]
     Task<Result> UpdateDisbursementAsync(UpdateDisbursementRequest request, Guid userId, CancellationToken cancellationToken = default);
 }

PostFundManagement.Application/Abstractions/Services/IGovernanceService.cs

@@ -7,31 +7,43 @@ namespace PostFundManagement.Application.Abstractions.Services;
 
 public interface IGovernanceService
 {
+    [Log]
     Task<Result<Programme[]>> GetProgrammesAsync(string portfolioIdHash, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Portfolio[]>> GetPorfoliosAsync(string organisationIdHash, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Organisation[]>> GetOrganisationsAsync(Pagination pagination, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Organisation>> GetOrganisationAsync(string organisationIdHash, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Instrument[]>> GetInstrumentsAsync(string programmeIdHash, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Dashboard>> GetDashboardAsync(CancellationToken cancellationToken = default);
 
+    [Log]
     [Audit]
     Task<Result> CreateOrganisationAsync(CreateOrganisationRequest request, Guid userId, CancellationToken cancellationToken = default);
 
+    [Log]
     [Audit]
     Task<Result<Organisation>> UpdateOrganisationAsync(UpdateOrganisationRequest request, CancellationToken cancellationToken = default);
 
+    [Log]
     [Audit]
     Task<Result> CreatePortfolioAsync(CreatePortfolioRequest request, Guid userId, CancellationToken cancellationToken = default);
 
+    [Log]
     [Audit]
     Task<Result> UpdatePortfolioAsync(UpdatePortfolioRequest request, Guid userId, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Programme[]>> GetPortfolioProgrammesAsync(string portfolioIdHash, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Portfolio>> GetPortfolioAsync(string portfolioIdHash, CancellationToken cancellationToken = default);
 }

PostFundManagement.Application/Abstractions/Services/IGrantsService.cs

@@ -7,36 +7,49 @@ namespace PostFundManagement.Application.Abstractions.Services;
 
 public interface IGrantsService
 {
+    [Log]
     Task<Result<Contract[]>> GetContractsAsync(Pagination pagination, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Contract>> GetContractAsync(string contractIdHash, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Budget[]>> GetBudgetsAsync(Pagination pagination, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Budget>> GetBudgetAsync(string budgetIdHash, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Award[]>> GetAwardsAsync(Pagination pagination, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Award>> GetAwardAsync(string awardIdHash, CancellationToken cancellationToken = default);
 
+    [Log]
     [Audit]
     Task<Result> ExecuteContractAsync(ExecuteContractRequest request, Guid userId, CancellationToken cancellationToken = default);
 
+    [Log]
     [Audit]
     Task<Result> CreateContractAsync(CreateContractRequest request, Guid userId, CancellationToken cancellationToken = default);
 
+    [Log]
     [Audit]
     Task<Result> CreateBudgetAsync(CreateBudgetRequest request, Guid userId, CancellationToken cancellationToken = default);
 
+    [Log]
     [Audit]
     Task<Result> CreateAwardAsync(CreateAwardRequest request, Guid userId, CancellationToken cancellationToken = default);
 
+    [Log]
     [Audit]
     Task<Result<string>> GetContractUrlAsync(string contractIdHash, CancellationToken cancellationToken = default);
 
+    [Log]
     [Audit]
     Task<Result> UploadContractAsync(string contractIdHash, Guid userId, IFormFile file, CancellationToken cancellationToken = default);
 
+    [Log]
     [Audit]
     Task<Result> UpdateContractAsync(UpdateContractRequest request, CancellationToken cancellationToken = default);
 }

PostFundManagement.Application/Abstractions/Services/IIdentityService.cs

@@ -4,6 +4,7 @@ namespace PostFundManagement.Application.Abstractions.Services;
 
 public interface IIdentityService
 {
+    [Log]
     [Audit]
     Task<Result> UserIsAuthorisedAsync(Guid userId, CancellationToken cancellationToken = default);
 }

PostFundManagement.Application/Abstractions/Services/IProjectService.cs

@@ -7,48 +7,67 @@ namespace PostFundManagement.Application.Abstractions.Services;
 
 public interface IProjectService
 {
+    [Log]
     [Audit]
     Task<Result> UpdateProjectStatusAsync(UpdateProjectStatusRequest request, Guid userId, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Project[]>> GetProjectsAsync(Pagination pagination, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Project>> GetProjectAsync(string projectIdHash, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Domain.Models.Activity[]>> GetActivitiesAsync(string projectIdHash, CancellationToken cancellationToken = default);
 
+    [Log]
     [Audit]
     Task<Result> CreateProjectAsync(CreateProjectRequest request, Guid userId, CancellationToken cancellationToken = default);
 
+    [Log]
     [Audit]
     Task<Result> CreateActivityAsync(CreateActivityRequest request, Guid userId, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Milestone[]>> GetProjectMilestonesAsync(string projectIdHash, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Indicator[]>> GetProjectIndicatorsAsync(string projectIdHash, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Milestone>> GetMilestoneAsync(string milestoneIdHash, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Milestone[]>> GetMilestonesAsync(Pagination pagination, CancellationToken cancellationToken = default);
 
+    [Log]
     [Audit]
     Task<Result> UpdateMilestoneAsync(UpdateMilestoneRequest request, Guid userId, CancellationToken cancellationToken = default);
 
+    [Log]
     [Audit]
     Task<Result> UpdateProjectAsync(UpdateProjectRequest request, Guid userId, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Domain.Models.Activity>> GetActivityAsync(string activityIdHash, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Risk[]>> GetProjectRisksAsync(string projectIdHash, CancellationToken cancellationToken = default);
 
+    [Log]
     [Audit]
     Task<Result> CreateProgrammeAsync(CreateProgrammeRequest request, Guid userId, CancellationToken cancellationToken = default);
 
+    [Log]
     [Audit]
     Task<Result> UpdateProgrammeAsync(UpdateProgrammeRequest request, Guid userId, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Programme>> GetProgrammeAsync(string programmeIdHash, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Programme[]>> GetProgrammesAsync(Pagination pagination, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<Project[]>> GetProgrammeProjectsAsync(string programmeIdHash, CancellationToken cancellationToken = default);
 }

PostFundManagement.Application/Abstractions/Services/IUserService.cs

@@ -7,13 +7,17 @@ namespace PostFundManagement.Application.Abstractions.Services;
 
 public interface IUserService
 {
+    [Log]
     [Audit]
     Task<Result> SyncUserAsync(Guid userId, string email, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<User[]>> GetUsersAsync(Pagination pagination, UserFilterRequest request, CancellationToken cancellationToken = default);
 
+    [Log]
     [Audit]
     Task<Result> UpdateUserStatusAsync(Guid userId, ActivityStatus status, CancellationToken cancellationToken = default);
 
+    [Log]
     Task<Result<User>> GetUserAsync(Guid userId, CancellationToken cancellationToken);
 }

PostFundManagement.Application/Extensions/Services.cs

@@ -16,7 +16,7 @@ namespace PostFundManagement.Application.Extensions;
 
 public static class Services
 {
-    public static IServiceCollection AddAuditedCachedScoped<TInterface, TImplementation, TCacheDecorator>(this IServiceCollection services)
+    public static IServiceCollection AddLoggedAuditedCachedServiceScoped<TInterface, TImplementation, TCacheDecorator>(this IServiceCollection services)
         where TInterface : class
         where TImplementation : class, TInterface
         where TCacheDecorator : class, TInterface
@@ -27,30 +27,16 @@ public static class Services
         services.AddScoped(sp =>
         {
             var proxyGenerator = sp.GetRequiredService<ProxyGenerator>();
-            var interceptor = sp.GetRequiredService<AuditInterceptor>();
+            var auditInterceptor = sp.GetRequiredService<AuditInterceptor>();
+            var loggingInterceptor = sp.GetRequiredService<LoggingInterceptor>();
 
             var actual = sp.GetRequiredService<TImplementation>();
 
             var cached = ActivatorUtilities.CreateInstance<TCacheDecorator>(sp, actual);
 
-            return proxyGenerator.CreateInterfaceProxyWithTarget<TInterface>(cached, interceptor.ToInterceptor());
-        });
-
-        return services;
-    }
-
-    public static IServiceCollection AddAuditedScoped<TInterface, TImplementation>(this IServiceCollection services)
-            where TInterface : class
-            where TImplementation : class, TInterface
-    {
-        services.AddScoped<TImplementation>();
-        services.AddScoped(sp =>
-        {
-            var proxyGenerator = sp.GetRequiredService<ProxyGenerator>();
-            var actual = sp.GetRequiredService<TImplementation>();
-            var interceptor = sp.GetRequiredService<AuditInterceptor>();
-
-            return proxyGenerator.CreateInterfaceProxyWithTarget<TInterface>(actual, interceptor.ToInterceptor());
+            return proxyGenerator.CreateInterfaceProxyWithTarget<TInterface>(cached, 
+                loggingInterceptor.ToInterceptor(), 
+                           auditInterceptor.ToInterceptor());
         });
 
         return services;
@@ -59,15 +45,16 @@ public static class Services
     public static IServiceCollection AddRegisterServicesWithCaching(this IServiceCollection services, IConfiguration configuration)
     {
         services.AddScoped<AuditInterceptor>();
+        services.AddScoped<LoggingInterceptor>();
         services.AddSingleton<ProxyGenerator>();
 
-        services.AddAuditedCachedScoped<ICommunicationsService, CommunicationsService, CommunicationsCacheService>();
-        services.AddAuditedCachedScoped<IEvidenceService, EvidenceService, EvidenceCacheService>();
-        services.AddAuditedCachedScoped<IUserService, UserService, UserCacheService>();
-        services.AddAuditedCachedScoped<IExecutionService, ExecutionService, ExecutionCacheService>();
-        services.AddAuditedCachedScoped<IGovernanceService, GovernanceService, GovernanceCacheService>();
-        services.AddAuditedCachedScoped<IGrantsService, GrantsService, GrantsCacheService>();
-        services.AddAuditedCachedScoped<IProjectService, ProjectService, ProjectCacheService>();
+        services.AddLoggedAuditedCachedServiceScoped<ICommunicationsService, CommunicationsService, CommunicationsCacheService>();
+        services.AddLoggedAuditedCachedServiceScoped<IEvidenceService, EvidenceService, EvidenceCacheService>();
+        services.AddLoggedAuditedCachedServiceScoped<IUserService, UserService, UserCacheService>();
+        services.AddLoggedAuditedCachedServiceScoped<IExecutionService, ExecutionService, ExecutionCacheService>();
+        services.AddLoggedAuditedCachedServiceScoped<IGovernanceService, GovernanceService, GovernanceCacheService>();
+        services.AddLoggedAuditedCachedServiceScoped<IGrantsService, GrantsService, GrantsCacheService>();
+        services.AddLoggedAuditedCachedServiceScoped<IProjectService, ProjectService, ProjectCacheService>();
 
         services.AddScoped<IIdentityService, IdentityService>();
         services.Decorate<IIdentityService, IdentityCacheService>();

PostFundManagement.Application/Interceptors/LoggingInterceptor.cs

@@ -0,0 +1,136 @@
+using PostFundManagement.Domain.Attributes;
+
+namespace PostFundManagement.Application.Interceptors;
+
+public sealed class LoggingInterceptor(ILogger<LoggingInterceptor> logger) : IAsyncInterceptor
+{
+    public void InterceptSynchronous(IInvocation invocation)
+    {
+        invocation.Proceed();
+
+        CheckAndLogIfFailed(invocation, invocation.ReturnValue);
+    }
+
+    public void InterceptAsynchronous(IInvocation invocation) =>
+        invocation.ReturnValue = InternalInterceptAsynchronous(invocation);
+
+    public void InterceptAsynchronous<TResult>(IInvocation invocation) =>
+        invocation.ReturnValue = InternalInterceptAsynchronous<TResult>(invocation);
+
+    private static async Task InternalInterceptAsynchronous(IInvocation invocation)
+    {
+        invocation.Proceed();
+
+        var task = (Task)invocation.ReturnValue;
+
+        await task.ConfigureAwait(false);
+    }
+
+    private async Task<TResult> InternalInterceptAsynchronous<TResult>(IInvocation invocation)
+    {
+        invocation.Proceed();
+
+        var task = (Task<TResult>)invocation.ReturnValue;
+        var resultObj = await task.ConfigureAwait(false);
+
+        var method = invocation.MethodInvocationTarget ?? invocation.Method;
+        var auditAttr = method.GetCustomAttribute<LogAttribute>()
+                     ?? invocation.Method.GetCustomAttribute<LogAttribute>();
+
+        if (auditAttr == null) return resultObj;
+
+        CheckAndLogIfFailed(invocation, resultObj);
+
+        return resultObj;
+    }
+
+    private void CheckAndLogIfFailed(IInvocation invocation, object? resultObj)
+    {
+        if (resultObj is IResultBase result && result.IsFailed)
+        {
+            try
+            {
+                var method = invocation.MethodInvocationTarget ?? invocation.Method;
+                var parameters = BuildPayloadSummary(method.GetParameters(), invocation.Arguments);
+
+                var errorMessages = new List<string>();
+
+                if (result.Reasons != null)
+                {
+                    foreach (var reason in result.Reasons)
+                        if (reason is IError error)
+                            errorMessages.Add(error.Message);
+                }
+
+                var errorsString = string.Join("; ", errorMessages);
+
+                logger.LogError("Method {MethodName} failed. Errors: {Errors}. Parameters: {@Parameters}",
+                    method.Name, errorsString, parameters);
+            }
+            catch (Exception ex)
+            {
+                logger.LogWarning(ex, "Failed to write error log for method {MethodName}.", invocation.Method.Name);
+            }
+        }
+    }
+
+    private static string[] BuildPayloadSummary(ParameterInfo[] parameters, object[] args)
+    {
+        var entries = new List<string>();
+
+        for (var i = 0; i < parameters.Length; i++)
+        {
+            var param = parameters[i];
+            var arg = args[i];
+
+            if (param.ParameterType == typeof(CancellationToken))
+                continue;
+
+            if (arg == null)
+            {
+                entries.Add($"{param.Name}: null");
+
+                continue;
+            }
+
+            if (arg is IFormFile file)
+            {
+                entries.Add($"{param.Name}: [File] Name='{file.FileName}', Size={file.Length} bytes, Type='{file.ContentType}'");
+
+                continue;
+            }
+
+            if (arg is IEnumerable<IFormFile> files)
+            {
+                var fileSummaries = new List<string>();
+
+                foreach (var f in files)
+                    fileSummaries.Add($"'{f.FileName}' ({f.Length} bytes)");
+
+                entries.Add($"{param.Name}: [Files] count={fileSummaries.Count} [{string.Join(", ", fileSummaries)}]");
+
+                continue;
+            }
+
+            if (arg is Stream stream)
+            {
+                entries.Add($"{param.Name}: [Stream] Length={(stream.CanSeek ? stream.Length : -1)} bytes");
+
+                continue;
+            }
+
+            try
+            {
+                var json = JsonSerializer.Serialize(arg);
+
+                entries.Add($"{param.Name}: {json}");
+            }
+            catch
+            {
+                entries.Add($"{param.Name}: [Unserializable]");
+            }
+        }
+
+        return [.. entries];
+    }
+}

PostFundManagement.Application/Services/Shared/AuditService.cs

@@ -15,7 +15,7 @@ public sealed class AuditService(IDbContextFactory<ApplicationDbContext> context
             {
                 EntityId = entityId,
                 Action = action,
-                Changes = changes,
+                Changes = new Domain.Models.AuditChanges { Logs = changes },
                 EntityName = entityName,
                 PerformedBy = performedBy,
                 Timestamp = DateTime.UtcNow,

PostFundManagement.Application/Services/Users/UserService.cs

@@ -85,7 +85,7 @@ public sealed class UserService(IDbContextFactory<ApplicationDbContext> contextF
             var user = await context.Users.AsNoTracking()
                 .FirstOrDefaultAsync(f => f.Id == userId, cancellationToken);
 
-            return Result.FailIf(user is null, NotFoundError.New)
-                .ToResult(user!.Map());
+            return Result.FailIf(user == null, NotFoundError.New)
+                .ToResult(user?.Map()!);
         }));
 }

PostFundManagement.Domain/Abstractions/ITenantEntity.cs

@@ -0,0 +1,6 @@
+namespace PostFundManagement.Domain.Abstractions;
+
+public interface ITenantEntity
+{
+    public long TenantId { get; set; }
+}

PostFundManagement.Domain/Attributes/LogAttribute.cs

@@ -0,0 +1,4 @@
+namespace PostFundManagement.Domain.Attributes;
+
+[AttributeUsage(AttributeTargets.Method, Inherited = false, AllowMultiple = false)]
+public sealed class LogAttribute : Attribute;

PostFundManagement.Domain/Entities/Activity.cs

@@ -1,10 +1,12 @@
+using PostFundManagement.Domain.Abstractions;
 using static PostFundManagement.Domain.Extensions.Constants;
 
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<ActivityConfiguration, Activity>]
-public class Activity : Models.Activity
+public class Activity : Models.Activity, ITenantEntity
 {
+    public virtual Tenant? Tenant { get; set; }
+
     public virtual User? Creator { get; set; }
 
     public virtual User? Updator { get; set; }
@@ -26,6 +28,7 @@ public sealed class ActivityConfiguration : IEntityTypeConfiguration<Activity>
 
         builder.HasKey(pk => pk.Id);
         builder.Property(f => f.ProjectId).IsRequired();
+        builder.Property(f => f.TenantId).IsRequired();
         builder.Property(f => f.MilestoneId).IsRequired();
         builder.Property(f => f.CreatedBy).IsRequired();
         builder.Property(f => f.UpdatedBy).IsRequired(false);
@@ -40,6 +43,12 @@ public sealed class ActivityConfiguration : IEntityTypeConfiguration<Activity>
         builder.Property(f => f.Title).IsRequired().HasMaxLength(LabelLength);
         builder.Property(f => f.Description).IsRequired().HasMaxLength(TextLength);
 
+        builder.HasOne(f => f.Tenant)
+            .WithMany()
+            .HasForeignKey(fk => fk.TenantId)
+            .IsRequired()
+            .OnDelete(DeleteBehavior.NoAction);
+
         builder.HasOne(f => f.Project)
             .WithMany()
             .HasForeignKey(fk => fk.ProjectId)

PostFundManagement.Domain/Entities/AuditLog.cs

@@ -1,8 +1,8 @@
+using PostFundManagement.Domain.Models;
 using static PostFundManagement.Domain.Extensions.Constants;
 
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<AuditLogConfiguration, AuditLog>]
 public sealed class AuditLog : Models.AuditLog;
 
 public sealed class AuditLogConfiguration : IEntityTypeConfiguration<AuditLog>
@@ -16,7 +16,9 @@ public sealed class AuditLogConfiguration : IEntityTypeConfiguration<AuditLog>
         builder.Property(f => f.EntityName).IsRequired().HasMaxLength(LabelLength);
         builder.Property(f => f.EntityId).IsRequired();
         builder.Property(f => f.Action).IsRequired().HasMaxLength(ShortLabelLength);
-        builder.Property(f => f.Changes).IsRequired(false).HasColumnType("jsonb");
+        builder.Property(f => f.Changes).IsRequired(false).HasColumnType("jsonb")
+            .HasConversion(model => JsonSerializer.Serialize(model, JsonSerializerOptions.Default),
+                provider => JsonSerializer.Deserialize<AuditChanges>(provider, JsonSerializerOptions.Default));
         builder.Property(f => f.PerformedBy).IsRequired();
         builder.Property(f => f.Timestamp).IsRequired().HasDefaultValueSql("now()");
     }

PostFundManagement.Domain/Entities/Award.cs

@@ -1,7 +1,8 @@
+using PostFundManagement.Domain.Abstractions;
+
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<AwardConfiguration, Award>]
-public class Award : Models.Award
+public class Award : Models.Award, ITenantEntity
 {
     public virtual User? Creator { get; set; }
 

PostFundManagement.Domain/Entities/Beneficiary.cs

@@ -1,14 +1,18 @@
+using PostFundManagement.Domain.Abstractions;
 using static PostFundManagement.Domain.Extensions.Constants;
 
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<BeneficiaryConfiguration, Beneficiary>]
-public class Beneficiary : Models.Beneficiary
+public class Beneficiary : Models.Beneficiary, ITenantEntity
 {
+    public virtual Tenant? Tenant { get; set; }
+
     public virtual Project? Project { get; set; }
 
+    [ForeignKey(nameof(CreatedBy))]
     public virtual User? Creator { get; set; }
 
+    [ForeignKey(nameof(UserId))]
     public virtual User? User { get; set; }
 }
 
@@ -19,6 +23,7 @@ public sealed class BeneficiaryConfiguration : IEntityTypeConfiguration<Benefici
         builder.ToTable(nameof(Beneficiary).Pluralize());
 
         builder.HasKey(pk => pk.Id);
+        builder.Property(f => f.TenantId).IsRequired();
         builder.Property(f => f.ProjectId).IsRequired();
         builder.Property(f => f.CreatedBy).IsRequired();
         builder.Property(f => f.UserId).IsRequired();
@@ -29,6 +34,12 @@ public sealed class BeneficiaryConfiguration : IEntityTypeConfiguration<Benefici
         builder.Property(f => f.ReachedCount).IsRequired();
         builder.Property(f => f.Location).IsRequired();
 
+        builder.HasOne(f => f.Tenant)
+            .WithMany()
+            .HasForeignKey(fk => fk.TenantId)
+            .IsRequired()
+            .OnDelete(DeleteBehavior.NoAction);
+
         builder.HasOne(f => f.Project)
             .WithMany()
             .HasForeignKey(fk => fk.ProjectId)

PostFundManagement.Domain/Entities/Budget.cs

@@ -1,10 +1,12 @@
+using PostFundManagement.Domain.Abstractions;
 using static PostFundManagement.Domain.Extensions.Constants;
 
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<BudgetConfiguration, Budget>]
-public class Budget : Models.Budget
+public class Budget : Models.Budget, ITenantEntity
 {
+    public virtual Tenant? Tenant { get; set; }
+
     public virtual Project? Project { get; set; }
 
     public virtual User? Creator { get; set; }
@@ -19,6 +21,7 @@ public sealed class BudgetConfiguration : IEntityTypeConfiguration<Budget>
         builder.ToTable(nameof(Budget).Pluralize());
 
         builder.HasKey(pk => pk.Id);
+        builder.Property(f => f.TenantId).IsRequired();
         builder.Property(f => f.ProjectId).IsRequired();
         builder.Property(f => f.CreatedBy).IsRequired();
         builder.Property(f => f.ApprovedBy).IsRequired(false);
@@ -27,6 +30,12 @@ public sealed class BudgetConfiguration : IEntityTypeConfiguration<Budget>
         builder.Property(f => f.Name).IsRequired().HasMaxLength(LabelLength);
         builder.Property(f => f.Amount).IsRequired().HasPrecision(18, 2);
 
+        builder.HasOne(f => f.Tenant)
+            .WithMany()
+            .HasForeignKey(fk => fk.TenantId)
+            .IsRequired()
+            .OnDelete(DeleteBehavior.NoAction);
+
         builder.HasOne(f => f.Project)
             .WithMany()
             .HasForeignKey(fk => fk.ProjectId)

PostFundManagement.Domain/Entities/ChangeRequest.cs

@@ -1,10 +1,12 @@
+using PostFundManagement.Domain.Abstractions;
 using static PostFundManagement.Domain.Extensions.Constants;
 
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<ChangeRequestConfiguration, ChangeRequest>]
-public class ChangeRequest : Models.ChangeRequest
+public class ChangeRequest : Models.ChangeRequest, ITenantEntity
 {
+    public virtual Tenant? Tenant { get; set; }
+
     public virtual Project? Project { get; set; }
 
     public virtual User? Creator { get; set; }
@@ -19,6 +21,7 @@ public sealed class ChangeRequestConfiguration : IEntityTypeConfiguration<Change
         builder.ToTable(nameof(ChangeRequest).Pluralize());
 
         builder.HasKey(pk => pk.Id);
+        builder.Property(f => f.TenantId).IsRequired();
         builder.Property(f => f.ProjectId).IsRequired();
         builder.Property(f => f.CreatedBy).IsRequired();
         builder.Property(f => f.ApprovedBy).IsRequired(false);
@@ -31,6 +34,12 @@ public sealed class ChangeRequestConfiguration : IEntityTypeConfiguration<Change
         builder.Property(f => f.Status).IsRequired().HasConversion<int>().HasDefaultValueSql("1")
             .HasSentinel(ApprovalStatus.Pending);
 
+        builder.HasOne(f => f.Tenant)
+            .WithMany()
+            .HasForeignKey(fk => fk.TenantId)
+            .IsRequired()
+            .OnDelete(DeleteBehavior.NoAction);
+
         builder.HasOne(f => f.Project)
             .WithMany()
             .HasForeignKey(fk => fk.ProjectId)

PostFundManagement.Domain/Entities/ComplianceItem.cs

@@ -1,10 +1,12 @@
+using PostFundManagement.Domain.Abstractions;
 using static PostFundManagement.Domain.Extensions.Constants;
 
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<ComplianceItemConfiguration, ComplianceItem>]
-public class ComplianceItem : Models.ComplianceItem
+public class ComplianceItem : Models.ComplianceItem, ITenantEntity
 {
+    public virtual Tenant? Tenant { get; set; }
+
     public virtual Project? Project { get; set; }
 
     public virtual User? Creator { get; set; }
@@ -19,6 +21,7 @@ public sealed class ComplianceItemConfiguration : IEntityTypeConfiguration<Compl
         builder.ToTable(nameof(ComplianceItem).Pluralize());
 
         builder.HasKey(pk => pk.Id);
+        builder.Property(f => f.TenantId).IsRequired();
         builder.Property(f => f.ProjectId).IsRequired();
         builder.Property(f => f.CreatedBy).IsRequired();
         builder.Property(f => f.VerifiedBy).IsRequired(false);

PostFundManagement.Domain/Entities/Contract.cs

@@ -1,8 +1,11 @@
+using PostFundManagement.Domain.Abstractions;
+
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<ContractConfiguration, Contract>]
-public class Contract : Models.Contract
+public class Contract : Models.Contract, ITenantEntity
 {
+    public virtual Tenant? Tenant { get; set; }
+
     public virtual Award? Award { get; set; }
 
     public virtual User? Creator { get; set; }
@@ -15,8 +18,8 @@ public sealed class ContractConfiguration : IEntityTypeConfiguration<Contract>
         builder.ToTable(nameof(Contract).Pluralize());
 
         builder.HasKey(pk => pk.Id);
+        builder.Property(f => f.TenantId).IsRequired();
         builder.HasIndex(f => f.AwardId).IsUnique();
-
         builder.Property(f => f.AwardId).IsRequired();
         builder.Property(f => f.CreatedBy).IsRequired();
         builder.Property(f => f.CreatedAt).IsRequired().HasDefaultValueSql("now()");
@@ -28,6 +31,12 @@ public sealed class ContractConfiguration : IEntityTypeConfiguration<Contract>
         builder.Property(f => f.Status).IsRequired().HasConversion<int>().HasDefaultValueSql("1")
             .HasSentinel(ContractStatus.Draft);
 
+        builder.HasOne(f => f.Tenant)
+            .WithMany()
+            .HasForeignKey(fk => fk.TenantId)
+            .IsRequired()
+            .OnDelete(DeleteBehavior.NoAction);
+
         builder.HasOne(f => f.Award)
             .WithOne(f => f.Contract)
             .HasForeignKey<Domain.Entities.Contract>(fk => fk.AwardId)

PostFundManagement.Domain/Entities/Disbursement.cs

@@ -1,8 +1,11 @@
+using PostFundManagement.Domain.Abstractions;
+
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<DisbursementConfiguration, Disbursement>]
-public class Disbursement : Models.Disbursement
+public class Disbursement : Models.Disbursement, ITenantEntity
 {
+    public virtual Tenant? Tenant { get; set; }
+
     public virtual Project? Project { get; set; }
 
     public virtual Milestone? Milestone { get; set; }
@@ -19,6 +22,7 @@ public sealed class DisbursementConfiguration : IEntityTypeConfiguration<Disburs
         builder.ToTable(nameof(Disbursement).Pluralize());
 
         builder.HasKey(pk => pk.Id);
+        builder.Property(f => f.TenantId).IsRequired();
         builder.Property(f => f.ProjectId).IsRequired();
         builder.Property(f => f.MilestoneId).IsRequired(false);
         builder.Property(f => f.CreatedBy).IsRequired();
@@ -29,6 +33,12 @@ public sealed class DisbursementConfiguration : IEntityTypeConfiguration<Disburs
         builder.Property(f => f.Status).IsRequired().HasConversion<int>().HasDefaultValueSql("1")
             .HasSentinel(ApprovalStatus.Pending);
 
+        builder.HasOne(f => f.Tenant)
+            .WithMany()
+            .HasForeignKey(fk => fk.TenantId)
+            .IsRequired()
+            .OnDelete(DeleteBehavior.NoAction);
+
         builder.HasOne(f => f.Project)
             .WithMany()
             .HasForeignKey(fk => fk.ProjectId)

PostFundManagement.Domain/Entities/Evidence.cs

@@ -1,8 +1,11 @@
+using PostFundManagement.Domain.Abstractions;
+
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<EvidenceConfiguration, Evidence>]
-public class Evidence : Models.Evidence
+public class Evidence : Models.Evidence, ITenantEntity
 {
+    public virtual Tenant? Tenant { get; set; }
+
     public virtual Project? Project { get; set; }
 
     public virtual Milestone? Milestone { get; set; }
@@ -23,6 +26,7 @@ public sealed class EvidenceConfiguration : IEntityTypeConfiguration<Evidence>
         builder.ToTable(nameof(Evidence).Pluralize());
 
         builder.HasKey(f => f.Id);
+        builder.Property(f => f.TenantId).IsRequired();
         builder.Property(f => f.ProjectId).IsRequired();
         builder.Property(f => f.MilestoneId).IsRequired();
         builder.Property(f => f.IndicatorId).IsRequired();
@@ -38,6 +42,12 @@ public sealed class EvidenceConfiguration : IEntityTypeConfiguration<Evidence>
         builder.Property(f => f.Type).IsRequired().HasConversion<int>().HasDefaultValueSql("9")
             .HasSentinel(EvidenceType.ProcurementDocument);
 
+        builder.HasOne(f => f.Tenant)
+            .WithMany()
+            .HasForeignKey(fk => fk.TenantId)
+            .IsRequired()
+            .OnDelete(DeleteBehavior.NoAction);
+
         builder.HasOne(f => f.Project)
             .WithMany()
             .HasForeignKey(fk => fk.ProjectId)

PostFundManagement.Domain/Entities/Indicator.cs

@@ -1,10 +1,12 @@
+using PostFundManagement.Domain.Abstractions;
 using static PostFundManagement.Domain.Extensions.Constants;
 
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<IndicatorConfiguration, Indicator>]
-public class Indicator : Models.Indicator
+public class Indicator : Models.Indicator, ITenantEntity
 {
+    public virtual Tenant? Tenant { get; set; }
+
     public virtual Project? Project { get; set; }
 
     public virtual User? Creator { get; set; }
@@ -17,6 +19,7 @@ public sealed class IndicatorConfiguration : IEntityTypeConfiguration<Indicator>
         builder.ToTable(nameof(Indicator).Pluralize());
 
         builder.HasKey(pk => pk.Id);
+        builder.Property(f => f.TenantId).IsRequired();
         builder.Property(f => f.ProjectId).IsRequired();
         builder.Property(f => f.CreatedBy).IsRequired();
         builder.Property(f => f.CreatedAt).IsRequired().HasDefaultValueSql("now()");
@@ -26,6 +29,12 @@ public sealed class IndicatorConfiguration : IEntityTypeConfiguration<Indicator>
         builder.Property(f => f.TargetAmount).IsRequired().HasPrecision(18, 2);
         builder.Property(f => f.ActualAmount).IsRequired().HasPrecision(18, 2);
 
+        builder.HasOne(f => f.Tenant)
+            .WithMany()
+            .HasForeignKey(fk => fk.TenantId)
+            .IsRequired()
+            .OnDelete(DeleteBehavior.NoAction);
+
         builder.HasOne(f => f.Project)
             .WithMany()
             .HasForeignKey(fk => fk.ProjectId)

PostFundManagement.Domain/Entities/Instrument.cs

@@ -1,10 +1,12 @@
+using PostFundManagement.Domain.Abstractions;
 using static PostFundManagement.Domain.Extensions.Constants;
 
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<InstrumentConfiguration, Instrument>]
-public class Instrument : Models.Instrument
+public class Instrument : Models.Instrument, ITenantEntity
 {
+    public virtual Tenant? Tenant { get; set; }
+
     public virtual User? Creator { get; set; }
 
     public virtual Programme? Programme { get; set; }
@@ -17,6 +19,7 @@ public sealed class InstrumentConfiguration : IEntityTypeConfiguration<Instrumen
         builder.ToTable(nameof(Instrument).Pluralize());
 
         builder.HasKey(pk => pk.Id);
+        builder.Property(f => f.TenantId).IsRequired();
         builder.Property(f => f.ProgrammeId).IsRequired();
         builder.Property(f => f.Code).IsRequired().HasMaxLength(ShortLabelLength);
         builder.Property(f => f.Name).IsRequired().HasMaxLength(LabelLength);
@@ -26,6 +29,12 @@ public sealed class InstrumentConfiguration : IEntityTypeConfiguration<Instrumen
         builder.Property(f => f.CreatedBy).IsRequired();
         builder.Property(f => f.CreatedAt).IsRequired().HasDefaultValueSql("now()");
 
+        builder.HasOne(f => f.Tenant)
+            .WithMany()
+            .HasForeignKey(fk => fk.TenantId)
+            .IsRequired()
+            .OnDelete(DeleteBehavior.NoAction);
+
         builder.HasOne(f => f.Programme)
             .WithMany(f => f.Instruments)
             .HasForeignKey(fk => fk.ProgrammeId)

PostFundManagement.Domain/Entities/Invite.cs

@@ -1,8 +1,11 @@
+using PostFundManagement.Domain.Abstractions;
+
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<InviteConfiguration, Invite>]
-public class Invite : Models.Invite
+public class Invite : Models.Invite, ITenantEntity
 {
+    public virtual Tenant? Tenant { get; set; }
+
     public virtual Organisation? Organisation { get; set; }
 
     public virtual Organisation? InvitedOrganisation { get; set; }
@@ -21,6 +24,7 @@ public sealed class InviteConfiguration : IEntityTypeConfiguration<Invite>
         builder.ToTable(nameof(Invite).Pluralize());
 
         builder.HasKey(pk => pk.Id);
+        builder.Property(f => f.TenantId).IsRequired();
         builder.Property(f => f.OrganisationId).IsRequired();
         builder.Property(f => f.InvitedOrganisationId).IsRequired();
         builder.Property(f => f.AwardId).IsRequired();
@@ -31,6 +35,12 @@ public sealed class InviteConfiguration : IEntityTypeConfiguration<Invite>
         builder.Property(f => f.CreatedAt).IsRequired().HasDefaultValueSql("now()");
         builder.Property(f => f.UpdatedAt).IsRequired(false);
 
+        builder.HasOne(f => f.Tenant)
+            .WithMany()
+            .HasForeignKey(fk => fk.TenantId)
+            .IsRequired()
+            .OnDelete(DeleteBehavior.NoAction);
+
         builder.HasOne(f => f.Organisation)
             .WithMany()
             .HasForeignKey(fk => fk.OrganisationId)

PostFundManagement.Domain/Entities/Issue.cs

@@ -1,10 +1,12 @@
+using PostFundManagement.Domain.Abstractions;
 using static PostFundManagement.Domain.Extensions.Constants;
 
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<IssueConfiguration, Issue>]
-public class Issue : Models.Issue
+public class Issue : Models.Issue, ITenantEntity
 {
+    public virtual Tenant? Tenant { get; set; }
+
     public virtual Project? Project { get; set; }
 
     public virtual User? Creator { get; set; }
@@ -19,6 +21,7 @@ public sealed class IssueConfiguration : IEntityTypeConfiguration<Issue>
         builder.ToTable(nameof(Issue).Pluralize());
 
         builder.HasKey(pk => pk.Id);
+        builder.Property(f => f.TenantId).IsRequired();
         builder.Property(f => f.ProjectId).IsRequired();
         builder.Property(f => f.CreatedBy).IsRequired();
         builder.Property(f => f.CreatedAt).IsRequired().HasDefaultValueSql("now()");
@@ -32,6 +35,12 @@ public sealed class IssueConfiguration : IEntityTypeConfiguration<Issue>
             .HasSentinel(ActivityStatus.Active);
         builder.Property(f => f.Resolution).IsRequired();
 
+        builder.HasOne(f => f.Tenant)
+            .WithMany()
+            .HasForeignKey(fk => fk.TenantId)
+            .IsRequired()
+            .OnDelete(DeleteBehavior.NoAction);
+
         builder.HasOne(f => f.Project)
             .WithMany()
             .HasForeignKey(fk => fk.ProjectId)

PostFundManagement.Domain/Entities/Milestone.cs

@@ -1,10 +1,12 @@
+using PostFundManagement.Domain.Abstractions;
 using static PostFundManagement.Domain.Extensions.Constants;
 
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<MilestoneConfiguration, Milestone>]
-public class Milestone : Models.Milestone
+public class Milestone : Models.Milestone, ITenantEntity
 {
+    public virtual Tenant? Tenant { get; set; }
+
     public virtual Project? Project { get; set; }
 
     public virtual User? Creator { get; set; }
@@ -19,6 +21,7 @@ public sealed class MilestoneConfiguration : IEntityTypeConfiguration<Milestone>
         builder.ToTable(nameof(Milestone).Pluralize());
 
         builder.HasKey(pk => pk.Id);
+        builder.Property(f => f.TenantId).IsRequired();
         builder.Property(f => f.ProjectId).IsRequired();
         builder.Property(f => f.CreatedBy).IsRequired();
         builder.Property(f => f.UpdatedBy).IsRequired(false);
@@ -31,6 +34,12 @@ public sealed class MilestoneConfiguration : IEntityTypeConfiguration<Milestone>
         builder.Property(f => f.Priority).IsRequired().HasConversion<int>().HasDefaultValueSql("1")
             .HasSentinel(Priority.Low);
 
+        builder.HasOne(f => f.Tenant)
+            .WithMany()
+            .HasForeignKey(fk => fk.TenantId)
+            .IsRequired()
+            .OnDelete(DeleteBehavior.NoAction);
+
         builder.HasOne(f => f.Project)
             .WithMany()
             .HasForeignKey(fk => fk.ProjectId)

PostFundManagement.Domain/Entities/Notification.cs

@@ -1,9 +1,9 @@
+using PostFundManagement.Domain.Abstractions;
 using static PostFundManagement.Domain.Extensions.Constants;
 
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<NotificationConfiguration, Notification>]
-public class Notification : Models.Notification
+public class Notification : Models.Notification, ITenantEntity
 {
     public virtual Tenant? Tenant { get; set; }
 

PostFundManagement.Domain/Entities/Organisation.cs

@@ -2,7 +2,6 @@ using static PostFundManagement.Domain.Extensions.Constants;
 
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<OrganisationConfiguration, Organisation>]
 public class Organisation : Models.Organisation
 {
     public virtual User? Creator { get; set; }

PostFundManagement.Domain/Entities/Outcome.cs

@@ -2,7 +2,6 @@ using static PostFundManagement.Domain.Extensions.Constants;
 
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<OutcomeConfiguration, Outcome>]
 public class Outcome : Models.Outcome
 {
     public virtual Beneficiary? Beneficiary { get; set; }

PostFundManagement.Domain/Entities/Portfolio.cs

@@ -1,9 +1,9 @@
+using PostFundManagement.Domain.Abstractions;
 using static PostFundManagement.Domain.Extensions.Constants;
 
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<PortfolioConfiguration, Portfolio>]
-public class Portfolio : Models.Portfolio
+public class Portfolio : Models.Portfolio, ITenantEntity
 {
     public virtual User? Creator { get; set; }
 

PostFundManagement.Domain/Entities/Programme.cs

@@ -1,9 +1,9 @@
+using PostFundManagement.Domain.Abstractions;
 using static PostFundManagement.Domain.Extensions.Constants;
 
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<ProgrammeConfiguration, Programme>]
-public class Programme : Models.Programme
+public class Programme : Models.Programme, ITenantEntity
 {
     public virtual User? Creator { get; set; }
 

PostFundManagement.Domain/Entities/Project.cs

@@ -1,9 +1,9 @@
+using PostFundManagement.Domain.Abstractions;
 using static PostFundManagement.Domain.Extensions.Constants;
 
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<ProjectConfiguration, Project>]
-public class Project : Models.Project
+public class Project : Models.Project, ITenantEntity
 {
     public virtual User? Creator { get; set; }
 

PostFundManagement.Domain/Entities/Risk.cs

@@ -1,10 +1,12 @@
+using PostFundManagement.Domain.Abstractions;
 using static PostFundManagement.Domain.Extensions.Constants;
 
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<RiskConfiguration, Risk>]
-public class Risk : Models.Risk
+public class Risk : Models.Risk, ITenantEntity
 {
+    public virtual Tenant? Tenant { get; set; }
+
     public virtual Project? Project { get; set; }
 
     public virtual User? Creator { get; set; }
@@ -17,6 +19,7 @@ public sealed class RiskConfiguration : IEntityTypeConfiguration<Risk>
         builder.ToTable(nameof(Risk).Pluralize());
 
         builder.HasKey(pk => pk.Id);
+        builder.Property(f => f.TenantId).IsRequired();
         builder.Property(f => f.ProjectId).IsRequired();
         builder.Property(f => f.CreatedBy).IsRequired();
         builder.Property(f => f.CreatedAt).IsRequired().HasDefaultValueSql("now()");
@@ -27,6 +30,12 @@ public sealed class RiskConfiguration : IEntityTypeConfiguration<Risk>
         builder.Property(f => f.Name).IsRequired().HasMaxLength(LabelLength);
         builder.Property(f => f.Description).IsRequired().HasMaxLength(TextLength);
 
+        builder.HasOne(f => f.Tenant)
+            .WithMany()
+            .HasForeignKey(fk => fk.TenantId)
+            .IsRequired()
+            .OnDelete(DeleteBehavior.NoAction);
+
         builder.HasOne(f => f.Project)
             .WithMany()
             .HasForeignKey(fk => fk.ProjectId)

PostFundManagement.Domain/Entities/Rule.cs

@@ -1,10 +1,12 @@
+using PostFundManagement.Domain.Abstractions;
 using static PostFundManagement.Domain.Extensions.Constants;
 
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<RuleConfiguration, Rule>]
-public class Rule : Models.Rule
+public class Rule : Models.Rule, ITenantEntity
 {
+    public virtual Tenant? Tenant { get; set; }
+
     public virtual User? Creator { get; set; }
 
     public virtual User? Updator { get; set; }
@@ -19,6 +21,7 @@ public sealed class RuleConfiguration : IEntityTypeConfiguration<Rule>
         builder.ToTable(nameof(Rule).Pluralize());
 
         builder.HasKey(fk => fk.Id);
+        builder.Property(f => f.TenantId).IsRequired();
         builder.Property(f => f.ProgrammeId).IsRequired();
         builder.Property(f => f.CreatedBy).IsRequired();
         builder.Property(f => f.UpdatedBy).IsRequired(false);
@@ -29,6 +32,12 @@ public sealed class RuleConfiguration : IEntityTypeConfiguration<Rule>
         builder.Property(f => f.Status).IsRequired().HasConversion<int>().HasDefaultValueSql("2")
             .HasSentinel(ActivityStatus.Inactive);
 
+        builder.HasOne(f => f.Tenant)
+            .WithMany()
+            .HasForeignKey(fk => fk.TenantId)
+            .IsRequired()
+            .OnDelete(DeleteBehavior.NoAction);
+
         builder.HasOne(f => f.Programme)
             .WithMany(f => f.Rules)
             .HasForeignKey(fk => fk.ProgrammeId)

PostFundManagement.Domain/Entities/SiteVisit.cs

@@ -1,10 +1,12 @@
+using PostFundManagement.Domain.Abstractions;
 using static PostFundManagement.Domain.Extensions.Constants;
 
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<SiteVisitConfiguration, SiteVisit>]
-public class SiteVisit : Models.SiteVisit
+public class SiteVisit : Models.SiteVisit, ITenantEntity
 {
+    public virtual Tenant? Tenant { get; set; }
+
     public virtual Project? Project { get; set; }
      
      public virtual User? Creator { get; set; }
@@ -17,6 +19,7 @@ public sealed class SiteVisitConfiguration : IEntityTypeConfiguration<SiteVisit>
         builder.ToTable(nameof(SiteVisit).Pluralize());
 
         builder.HasKey(pk => pk.Id);
+        builder.Property(f => f.TenantId).IsRequired();
         builder.Property(f => f.ProjectId).IsRequired();
         builder.Property(f => f.CreatedBy).IsRequired();
         builder.Property(f => f.CreatedAt).IsRequired().HasDefaultValueSql("now()");
@@ -26,6 +29,12 @@ public sealed class SiteVisitConfiguration : IEntityTypeConfiguration<SiteVisit>
         builder.Property(f => f.Status).IsRequired().HasConversion<int>().HasDefaultValueSql("1")
             .HasSentinel(ApprovalStatus.Pending);
 
+        builder.HasOne(f => f.Tenant)
+            .WithMany()
+            .HasForeignKey(fk => fk.TenantId)
+            .IsRequired()
+            .OnDelete(DeleteBehavior.NoAction);
+
         builder.HasOne(f => f.Project)
             .WithMany()
             .HasForeignKey(fk => fk.ProjectId)

PostFundManagement.Domain/Entities/Tenant.cs

@@ -2,7 +2,6 @@
 
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<TenantConfiguration, Tenant>]
 public class Tenant : Models.Tenant
 {
     public virtual User? Creator { get; set; }

PostFundManagement.Domain/Entities/TenantOrganisation.cs

@@ -1,6 +1,5 @@
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<TenantOrganisationConfiguration, TenantOrganisation>]
 public class TenantOrganisation : Models.TenantOrganisation
 {
     public virtual Tenant? Tenant { get; set; }
@@ -17,6 +16,8 @@ public sealed class TenantOrganisationConfiguration : IEntityTypeConfiguration<T
         builder.ToTable(nameof(TenantOrganisation).Pluralize());
 
         builder.HasKey(pk => pk.Id);
+        builder.HasIndex(to => new { to.TenantId, to.OrganisationId }).IsUnique();
+
         builder.Property(f => f.CreatedAt).IsRequired().HasDefaultValueSql("now()");
         builder.Property(f => f.CreatedBy).IsRequired();
         builder.Property(f => f.TenantId).IsRequired();

PostFundManagement.Domain/Entities/TenantUser.cs

@@ -1,12 +1,13 @@
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<TenantUserConfiguration, TenantUser>]
 public class TenantUser : Models.TenantUser
 {
     public virtual Tenant? Tenant { get; set; }
 
+    [ForeignKey(nameof(CreatedBy))]
     public virtual User? Creator { get; set; }
 
+    [ForeignKey(nameof(UserId))]
     public virtual User? User { get; set; }
 }
 
@@ -17,6 +18,8 @@ public sealed class TenantUserConfiguration : IEntityTypeConfiguration<TenantUse
         builder.ToTable(nameof(TenantUser).Pluralize());
 
         builder.HasKey(pk => pk.Id);
+        builder.HasIndex(tu => new { tu.TenantId, tu.UserId }).IsUnique();
+
         builder.Property(f => f.CreatedAt).IsRequired().HasDefaultValueSql("now()");
         builder.Property(f => f.CreatedBy).IsRequired();
         builder.Property(f => f.UserId).IsRequired();

PostFundManagement.Domain/Entities/User.cs

@@ -2,7 +2,6 @@ using static PostFundManagement.Domain.Extensions.Constants;
 
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<UserConfiguration, User>]
 public sealed class User : Models.User;
 
 public sealed class UserConfiguration : IEntityTypeConfiguration<User>

PostFundManagement.Domain/Models/Activity.cs

@@ -4,6 +4,8 @@ public class Activity
 {
     public long Id { get; set; }
 
+    public long TenantId { get; set; }
+    
     public long? ProjectId { get; set; }
 
     public long? MilestoneId { get; set; }

PostFundManagement.Domain/Models/AuditChanges.cs

@@ -0,0 +1,6 @@
+namespace PostFundManagement.Domain.Models;
+
+public sealed class AuditChanges
+{
+    public string[]? Logs { get; set; }
+}

PostFundManagement.Domain/Models/AuditLog.cs

@@ -12,7 +12,8 @@ public class AuditLog
 
     public string? Action { get; set; }
 
-    public string[]? Changes { get; set; }
+    [NotMapped]
+    public AuditChanges? Changes { get; set; }
 
     public Guid PerformedBy { get; set; }
 

PostFundManagement.Domain/Models/Beneficiary.cs

@@ -4,6 +4,8 @@ public class Beneficiary
 {
     public long Id { get; set; }
 
+    public long TenantId { get; set; }
+
     public long ProjectId { get; set; }
 
     public Guid UserId { get; set; }

PostFundManagement.Domain/Models/Budget.cs

@@ -4,6 +4,8 @@ public class Budget
 {
     public long Id { get; set; }
 
+    public long TenantId { get; set; }
+
     public long ProjectId { get; set; }
 
     public Guid CreatedBy { get; set; }

PostFundManagement.Domain/Models/ChangeRequest.cs

@@ -4,6 +4,8 @@ public class ChangeRequest
 {
     public long Id { get; set; }
 
+    public long TenantId { get; set; }
+
     public long ProjectId { get; set; }
 
     public string? Title { get; set; }

PostFundManagement.Domain/Models/ComplianceItem.cs

@@ -4,6 +4,8 @@ public class ComplianceItem
 {
     public long Id { get; set; }
 
+    public long TenantId { get; set; }
+
     public long ProjectId { get; set; }
 
     public string? Title { get; set; }

PostFundManagement.Domain/Models/Contract.cs

@@ -4,6 +4,8 @@ public class Contract
 {
     public long Id { get; set; }
 
+    public long TenantId { get; set; }
+
     public long AwardId { get; set; }
 
     public string? ExternalSignatureId { get; set; }

PostFundManagement.Domain/Models/Disbursement.cs

@@ -4,6 +4,8 @@ public class Disbursement
 {
     public long Id { get; set; }
 
+    public long TenantId { get; set; }
+
     public long ProjectId { get; set; }
 
     public long? MilestoneId { get; set; }

PostFundManagement.Domain/Models/Evidence.cs

@@ -4,6 +4,8 @@ public class Evidence
 {
     public long Id { get; set; }
 
+    public long TenantId { get; set; }
+
     public long ProjectId { get; set; }
 
     public long MilestoneId { get; set; }

PostFundManagement.Domain/Models/Indicator.cs

@@ -4,6 +4,8 @@ public class Indicator
 {
     public long Id { get; set; }
 
+    public long TenantId { get; set; }
+
     public long ProjectId { get; set; }    
 
     public Guid CreatedBy { get; set; }

PostFundManagement.Domain/Models/Instrument.cs

@@ -4,6 +4,8 @@ public class Instrument
 {
     public long Id { get; set; }
 
+    public long TenantId { get; set; }
+
     public long ProgrammeId { get; set; }
 
     public string? Code { get; set; }

PostFundManagement.Domain/Models/Invite.cs

@@ -4,6 +4,8 @@ public class Invite
 {
     public long Id { get; set; }
 
+    public long TenantId { get; set; }
+
     public long OrganisationId { get; set; }
 
     public long InvitedOrganisationId { get; set; }

PostFundManagement.Domain/Models/Issue.cs

@@ -4,6 +4,8 @@ public class Issue
 {
     public long Id { get; set; }
 
+    public long TenantId { get; set; }
+
     public long ProjectId { get; set; }
 
     public string? Title { get; set; }

PostFundManagement.Domain/Models/Milestone.cs

@@ -4,6 +4,8 @@ public class Milestone
 {
     public long Id { get; set; }
 
+    public long TenantId { get; set; }
+
     public long ProjectId { get; set; }
 
     public Guid CreatedBy { get; set; }

PostFundManagement.Domain/Models/Risk.cs

@@ -4,6 +4,8 @@ public class Risk
 {
     public long Id { get; set; }
 
+    public long TenantId { get; set; }
+
     public long ProjectId { get; set; }    
 
     public Guid CreatedBy { get; set; }

PostFundManagement.Domain/Models/Rule.cs

@@ -4,6 +4,8 @@ public class Rule
 {
     public long Id { get; set; }
 
+    public long TenantId { get; set; }
+
     public long ProgrammeId { get; set; }
 
     public Guid CreatedBy { get; set; }

PostFundManagement.Domain/Models/SiteVisit.cs

@@ -4,6 +4,8 @@ public class SiteVisit
 {
     public long Id { get; set; }
 
+    public long TenantId { get; set; }
+
     public long ProjectId { get; set; }
 
     public DateTime VisitedAt { get; set; }

PostFundManagement.Domain/PostFundManagement.Domain.csproj

@@ -199,6 +199,7 @@
 
 <!-- Shared Usings -->
 <ItemGroup>
+  <Using Include="System.ComponentModel.DataAnnotations.Schema" />
   <Using Include="Microsoft.AspNetCore.DataProtection" />
   <Using Include="System.Security.Cryptography.X509Certificates" />
   <Using Include="Microsoft.AspNetCore.Components.Server.ProtectedBrowserStorage" />

PostFundManagement.Infrastructure/Database/ApplicationDbContext.cs

@@ -65,35 +65,60 @@ public sealed class ApplicationDbContext(DbContextOptions<ApplicationDbContext>
 
     public DbSet<User> Users => Set<User>();
 
+    private void ApplyGlobalTenantFilter<TEntity>(ModelBuilder modelBuilder)
+        where TEntity : class, ITenantEntity =>
+            modelBuilder.Entity<TEntity>().HasQueryFilter(e => BypassFilter || e.TenantId == CurrentTenantId);
+
     protected override void OnModelCreating(ModelBuilder modelBuilder)
     {
         base.OnModelCreating(modelBuilder);
 
-        modelBuilder.Entity<Portfolio>()
-            .HasQueryFilter(e => BypassFilter || e.TenantId == CurrentTenantId);
+        modelBuilder.ApplyConfigurationsFromAssembly(Assembly.GetExecutingAssembly());
 
-        modelBuilder.Entity<Programme>()
-            .HasQueryFilter(e => BypassFilter || e.TenantId == CurrentTenantId);
+        foreach (var entityType in modelBuilder.Model.GetEntityTypes())
+        {
+            if (typeof(ITenantEntity).IsAssignableFrom(entityType.ClrType))
+            {
+                var method = typeof(ApplicationDbContext).GetMethod(nameof(ApplyGlobalTenantFilter),
+                    BindingFlags.NonPublic | BindingFlags.Instance)?.MakeGenericMethod(entityType.ClrType);
 
-        modelBuilder.Entity<Project>()
-            .HasQueryFilter(e => BypassFilter || e.TenantId == CurrentTenantId);
-
-        modelBuilder.Entity<Award>()
-            .HasQueryFilter(e => BypassFilter || e.TenantId == CurrentTenantId);
-
-        modelBuilder.Entity<Notification>()
-            .HasQueryFilter(e => BypassFilter || e.TenantId == CurrentTenantId);
-
-        modelBuilder.Entity<TenantOrganisation>()
-            .HasQueryFilter(e => BypassFilter || e.TenantId == CurrentTenantId);
-
-        modelBuilder.Entity<TenantUser>()
-            .HasQueryFilter(e => BypassFilter || e.TenantId == CurrentTenantId);
-
-        modelBuilder.Entity<AuditLog>()
-            .HasQueryFilter(e => BypassFilter || e.TenantId == CurrentTenantId);
+                method?.Invoke(this, [modelBuilder]);
+            }
+        }
 
         modelBuilder.Entity<Organisation>().HasQueryFilter(o => BypassFilter ||
             Set<TenantOrganisation>().Any(to => to.TenantId == CurrentTenantId && to.OrganisationId == o.Id));
+
+        modelBuilder.Entity<User>().HasQueryFilter(o => BypassFilter ||
+            Set<TenantUser>().Any(to => to.TenantId == CurrentTenantId && to.UserId == o.Id));
+    }
+
+    public override Task<int> SaveChangesAsync(CancellationToken cancellationToken = default)
+    {
+        AlterQualifyingTenantEntity();
+
+        return base.SaveChangesAsync(cancellationToken);
+    }
+
+    public override int SaveChanges()
+    {
+        AlterQualifyingTenantEntity();
+
+        return base.SaveChanges();
+    }
+
+    private void AlterQualifyingTenantEntity()
+    {
+        var entries = ChangeTracker.Entries<ITenantEntity>()
+            .Where(e => e.State == EntityState.Added && e.Entity.TenantId == 0)
+            .ToList();
+
+        if (entries.Count == 0) return;
+
+        if (CurrentTenantId <= 0 && !BypassFilter)
+            throw new InvalidOperationException("Cannot save multi-tenant entity: CurrentTenantId is not set in the active execution context.");
+
+        foreach (var entry in entries)
+            entry.Entity.TenantId = CurrentTenantId;
     }
 }

PostFundManagement.Infrastructure/PostFundManagement.Infrastructure.csproj

@@ -26,6 +26,7 @@
     </PackageReference>
     <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="10.0.3" />
 
+    <Using Include="System.Reflection" />
     <Using Include="Microsoft.EntityFrameworkCore" />
     <Using Include="Microsoft.EntityFrameworkCore.Design" />
   </ItemGroup>