Stable multitenancy

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.Domain/Abstractions/ITenantEntity.cs

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

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, ITenantEntity
-public class Activity : Models.Activity
 {
+    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, ITenantEntity
-public class Award : Models.Award
 {
     public virtual User? Creator { get; set; }
 
@@ -41,7 +42,7 @@ public sealed class AwardConfiguration : IEntityTypeConfiguration<Award>
         builder.Property(f => f.Amount).IsRequired().HasPrecision(18, 2);
 
         builder.HasOne(f => f.Tenant)
-            .WithMany(f => f.Awards)
+            .WithMany()
             .HasForeignKey(fk => fk.TenantId)
             .IsRequired()
             .OnDelete(DeleteBehavior.Restrict);
@@ -77,9 +78,9 @@ public sealed class AwardConfiguration : IEntityTypeConfiguration<Award>
             .OnDelete(DeleteBehavior.NoAction);
 
         builder.HasOne(f => f.Approver)
-        .WithMany()
+            .WithMany()
-        .HasForeignKey(fk => fk.ApprovedBy)
+            .HasForeignKey(fk => fk.ApprovedBy)
-        .IsRequired(false)
+            .IsRequired(false)
-        .OnDelete(DeleteBehavior.NoAction);
+            .OnDelete(DeleteBehavior.NoAction);
     }
 }

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, ITenantEntity
-public class Beneficiary : Models.Beneficiary
 {
+    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, ITenantEntity
-public class Budget : Models.Budget
 {
+    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, ITenantEntity
-public class ChangeRequest : Models.ChangeRequest
 {
+    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, ITenantEntity
-public class ComplianceItem : Models.ComplianceItem
 {
+    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, ITenantEntity
-public class Contract : Models.Contract
 {
+    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, ITenantEntity
-public class Disbursement : Models.Disbursement
 {
+    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, ITenantEntity
-public class Evidence : Models.Evidence
 {
+    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, ITenantEntity
-public class Indicator : Models.Indicator
 {
+    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, ITenantEntity
-public class Instrument : Models.Instrument
 {
+    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, ITenantEntity
-public class Invite : Models.Invite
 {
+    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, ITenantEntity
-public class Issue : Models.Issue
 {
+    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, ITenantEntity
-public class Milestone : Models.Milestone
 {
+    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, ITenantEntity
-public class Notification : Models.Notification
 {
     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, ITenantEntity
-public class Portfolio : Models.Portfolio
 {
     public virtual User? Creator { get; set; }
 
@@ -32,7 +32,7 @@ public sealed class PortfolioConfiguration : IEntityTypeConfiguration<Portfolio>
         builder.Property(f => f.Description).IsRequired(false).HasMaxLength(TextLength);
 
         builder.HasOne(f => f.Tenant)
-            .WithMany(f => f.Portfolios)
+            .WithMany()
             .HasForeignKey(fk => fk.TenantId)
             .IsRequired()
             .OnDelete(DeleteBehavior.Restrict);

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, ITenantEntity
-public class Programme : Models.Programme
 {
     public virtual User? Creator { get; set; }
 
@@ -41,7 +41,7 @@ public sealed class ProgrammeConfiguration : IEntityTypeConfiguration<Programme>
             .HasSentinel(ApprovalStatus.Pending);
 
         builder.HasOne(f => f.Tenant)
-            .WithMany(f => f.Programmes)
+            .WithMany()
             .HasForeignKey(fk => fk.TenantId)
             .IsRequired()
             .OnDelete(DeleteBehavior.NoAction);

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, ITenantEntity
-public class Project : Models.Project
 {
     public virtual User? Creator { get; set; }
 
@@ -41,7 +41,7 @@ public sealed class ProjectConfiguration : IEntityTypeConfiguration<Project>
             .HasSentinel(ApprovalStatus.Pending);
 
         builder.HasOne(f => f.Tenant)
-            .WithMany(f => f.Projects)
+            .WithMany()
             .HasForeignKey(fk => fk.TenantId)
             .IsRequired()
             .OnDelete(DeleteBehavior.Restrict);

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, ITenantEntity
-public class Risk : Models.Risk
 {
+    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, ITenantEntity
-public class Rule : Models.Rule
 {
+    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

@@ -1,11 +1,13 @@
+using PostFundManagement.Domain.Abstractions;
 using static PostFundManagement.Domain.Extensions.Constants;
 
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<SiteVisitConfiguration, SiteVisit>]
+public class SiteVisit : Models.SiteVisit, ITenantEntity
-public class SiteVisit : Models.SiteVisit
 {
-     public virtual Project? Project { get; set; }
+    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

@@ -2,20 +2,11 @@
 
 namespace PostFundManagement.Domain.Entities;
 
-[EntityTypeConfiguration<TenantConfiguration, Tenant>]
 public class Tenant : Models.Tenant
 {
     public virtual User? Creator { get; set; }
 
     public virtual User? Updator { get; set; }
-
-    public ICollection<Award> Awards { get; set; } = [];
-
-    public ICollection<Project> Projects { get; set; } = [];
-
-    public ICollection<Programme> Programmes { get; set; } = [];
-
-    public ICollection<Portfolio> Portfolios { get; set; } = [];
 }
 
 public sealed class TenantConfiguration : IEntityTypeConfiguration<Tenant>

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

@@ -3,6 +3,8 @@ namespace PostFundManagement.Domain.Models;
 public class Activity
 {
     public long Id { get; set; }
+
+    public long TenantId { get; set; }
     
     public long? ProjectId { 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>()
+        modelBuilder.ApplyConfigurationsFromAssembly(Assembly.GetExecutingAssembly());
-            .HasQueryFilter(e => BypassFilter || e.TenantId == CurrentTenantId);
 
-        modelBuilder.Entity<Programme>()
+        foreach (var entityType in modelBuilder.Model.GetEntityTypes())
-            .HasQueryFilter(e => BypassFilter || e.TenantId == CurrentTenantId);
+        {
+            if (typeof(ITenantEntity).IsAssignableFrom(entityType.ClrType))
+            {
+                var method = typeof(ApplicationDbContext).GetMethod(nameof(ApplyGlobalTenantFilter),
+                    BindingFlags.NonPublic | BindingFlags.Instance)?.MakeGenericMethod(entityType.ClrType);
 
-        modelBuilder.Entity<Project>()
+                method?.Invoke(this, [modelBuilder]);
-            .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);
 
         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>