sales & grn fixers

Backend/ERPCore/Infra/Persistence/Configurations/GrnConfigConfiguration.cs

@@ -0,0 +1,42 @@
+using ERPCore.Domain.Entities;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+
+namespace ERPCore.Infra.Persistence.Configurations;
+
+/// <summary>
+/// Configures the singleton GRN-configuration row. The check constraint is what makes
+/// "singleton" a database guarantee rather than a convention (mirrors SalesConfig).
+/// </summary>
+public sealed class GrnConfigConfiguration : IEntityTypeConfiguration<GrnConfig>
+{
+    public void Configure(EntityTypeBuilder<GrnConfig> builder)
+    {
+        builder.ToTable("grn_config", t =>
+            t.HasCheckConstraint("ck_grn_config_singleton", $"\"ConfigId\" = {GrnConfig.SingletonId}"));
+
+        builder.HasKey(c => c.ConfigId);
+
+        // The id is fixed, never generated — there is exactly one row, seeded by DataSeeder.
+        builder.Property(c => c.ConfigId).ValueGeneratedNever();
+
+        // Sentinel = the CLR initializer (true), so an explicit false is still written on insert
+        // instead of being swallowed by the database default.
+        builder.Property(c => c.AllowWarehouseSelection).IsRequired().HasDefaultValue(true).HasSentinel(true);
+        builder.Property(c => c.AllowDiscounts).IsRequired().HasDefaultValue(true).HasSentinel(true);
+        builder.Property(c => c.AllowVat).IsRequired().HasDefaultValue(true).HasSentinel(true);
+
+        builder.HasOne(c => c.DefaultWarehouse)
+            .WithMany()
+            .HasForeignKey(c => c.DefaultWarehouseId)
+            .OnDelete(DeleteBehavior.SetNull);
+
+        // PostgreSQL xmin system column as the optimistic concurrency token (ETag).
+        builder.Property(c => c.RowVersion).IsRowVersion();
+
+        builder.HasOne(c => c.UpdatedByUser)
+            .WithMany()
+            .HasForeignKey(c => c.UpdatedBy)
+            .OnDelete(DeleteBehavior.Restrict);
+    }
+}

Backend/ERPCore/Infra/Persistence/DataSeeder.cs

@@ -47,6 +47,7 @@ public static class DataSeeder
         dirty |= await SeedProductConfigAsync(db, ct);
         dirty |= await SeedBranchConfigAsync(db, ct);
         dirty |= await SeedSalesConfigAsync(db, ct);
+        dirty |= await SeedGrnConfigAsync(db, ct);
         dirty |= await SeedNotificationConfigAsync(db, ct);
         dirty |= await SeedSalesMastersAsync(db, ct);
         dirty |= await SeedSalesStockAsync(db, ct);
@@ -144,6 +145,16 @@ public static class DataSeeder
         return true;
     }
 
+    /// <summary>Seeds the GRN configuration singleton — warehouse selection on, no default warehouse,
+    /// so New GRN keeps its warehouse picker until an admin opts in from Settings → Configuration → GRN Configuration.</summary>
+    private static async Task<bool> SeedGrnConfigAsync(ErpDbContext db, CancellationToken ct)
+    {
+        if (await db.GrnConfig.AnyAsync(c => c.ConfigId == GrnConfig.SingletonId, ct)) return false;
+
+        db.GrnConfig.Add(new GrnConfig { ConfigId = GrnConfig.SingletonId });
+        return true;
+    }
+
     private static async Task<bool> SeedNotificationConfigAsync(ErpDbContext db, CancellationToken ct)
     {
         if (await db.NotificationConfig.AnyAsync(c => c.NotificationConfigId == NotificationConfig.SingletonId, ct)) return false;

Backend/ERPCore/Infra/Persistence/ErpDbContext.cs

@@ -46,6 +46,7 @@ public class ErpDbContext : DbContext
     /// <summary>Singleton row gating whether this deployment uses branches at all.</summary>
     public DbSet<BranchConfig> BranchConfig => Set<BranchConfig>();
     public DbSet<SalesConfig> SalesConfig => Set<SalesConfig>();
+    public DbSet<GrnConfig> GrnConfig => Set<GrnConfig>();
     /// <summary>Singleton row for notification delivery preferences.</summary>
     public DbSet<NotificationConfig> NotificationConfig => Set<NotificationConfig>();
     public DbSet<NotificationConfigModule> NotificationConfigModules => Set<NotificationConfigModule>();