The repetitive fields in the configuration classes in the Ordering.Infrastructure project were gathered here by creating a base class.

src/Services/Ordering/Ordering.Infrastructure/EntityConfigurations/BaseConfiguration.cs

@@ -0,0 +1,15 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+using Microsoft.eShopOnContainers.Services.Ordering.Domain.Seedwork;
+
+namespace Ordering.Infrastructure.EntityConfigurations
+{
+    public class BaseConfiguration<TEntity> : IEntityTypeConfiguration<TEntity> where TEntity : Entity
+    {
+        public virtual void Configure(EntityTypeBuilder<TEntity> builder)
+        {
+            builder.Ignore(b => b.DomainEvents);
+            builder.HasKey(e => e.Id);
+        }
+    }
+}

src/Services/Ordering/Ordering.Infrastructure/EntityConfigurations/BuyerEntityTypeConfiguration.cs

@@ -5,17 +5,12 @@ using Microsoft.eShopOnContainers.Services.Ordering.Infrastructure;
 
 namespace Ordering.Infrastructure.EntityConfigurations
 {
-    class BuyerEntityTypeConfiguration
+    class BuyerEntityTypeConfiguration : BaseConfiguration<Buyer>
-        : IEntityTypeConfiguration<Buyer>
     {
-        public void Configure(EntityTypeBuilder<Buyer> buyerConfiguration)
+        public override void Configure(EntityTypeBuilder<Buyer> buyerConfiguration)
         {
             buyerConfiguration.ToTable("buyers", OrderingContext.DEFAULT_SCHEMA);
 
-            buyerConfiguration.HasKey(b => b.Id);
-
-            buyerConfiguration.Ignore(b => b.DomainEvents);
-
             buyerConfiguration.Property(b => b.Id)
                 .UseHiLo("buyerseq", OrderingContext.DEFAULT_SCHEMA);
 
@@ -36,6 +31,8 @@ namespace Ordering.Infrastructure.EntityConfigurations
             var navigation = buyerConfiguration.Metadata.FindNavigation(nameof(Buyer.PaymentMethods));
 
             navigation.SetPropertyAccessMode(PropertyAccessMode.Field);
+
+            base.Configure(buyerConfiguration);
         }
     }
 }

src/Services/Ordering/Ordering.Infrastructure/EntityConfigurations/OrderEntityTypeConfiguration.cs

@@ -7,16 +7,12 @@ using System;
 
 namespace Ordering.Infrastructure.EntityConfigurations
 {
-    class OrderEntityTypeConfiguration : IEntityTypeConfiguration<Order>
+    class OrderEntityTypeConfiguration : BaseConfiguration<Order>
     {
-        public void Configure(EntityTypeBuilder<Order> orderConfiguration)
+        public override void Configure(EntityTypeBuilder<Order> orderConfiguration)
         {
             orderConfiguration.ToTable("orders", OrderingContext.DEFAULT_SCHEMA);
 
-            orderConfiguration.HasKey(o => o.Id);
-
-            orderConfiguration.Ignore(b => b.DomainEvents);
-
             orderConfiguration.Property(o => o.Id)
                 .UseHiLo("orderseq", OrderingContext.DEFAULT_SCHEMA);
 
@@ -81,6 +77,9 @@ namespace Ordering.Infrastructure.EntityConfigurations
                 .WithMany()
                 // .HasForeignKey("OrderStatusId");
                 .HasForeignKey("_orderStatusId");
+
+
+            base.Configure(orderConfiguration);
         }
     }
 }

src/Services/Ordering/Ordering.Infrastructure/EntityConfigurations/OrderItemEntityTypeConfiguration.cs

@@ -5,17 +5,12 @@ using Microsoft.eShopOnContainers.Services.Ordering.Infrastructure;
 
 namespace Ordering.Infrastructure.EntityConfigurations
 {
-    class OrderItemEntityTypeConfiguration
+    class OrderItemEntityTypeConfiguration : BaseConfiguration<OrderItem>
-        : IEntityTypeConfiguration<OrderItem>
     {
-        public void Configure(EntityTypeBuilder<OrderItem> orderItemConfiguration)
+        public override void Configure(EntityTypeBuilder<OrderItem> orderItemConfiguration)
         {
             orderItemConfiguration.ToTable("orderItems", OrderingContext.DEFAULT_SCHEMA);
 
-            orderItemConfiguration.HasKey(o => o.Id);
-
-            orderItemConfiguration.Ignore(b => b.DomainEvents);
-
             orderItemConfiguration.Property(o => o.Id)
                 .UseHiLo("orderitemseq");
 
@@ -54,6 +49,8 @@ namespace Ordering.Infrastructure.EntityConfigurations
                 .UsePropertyAccessMode(PropertyAccessMode.Field)
                 .HasColumnName("PictureUrl")
                 .IsRequired(false);
+
+            base.Configure(orderItemConfiguration);
         }
     }
 }

src/Services/Ordering/Ordering.Infrastructure/EntityConfigurations/PaymentMethodEntityTypeConfiguration.cs

@@ -6,17 +6,12 @@ using System;
 
 namespace Ordering.Infrastructure.EntityConfigurations
 {
-    class PaymentMethodEntityTypeConfiguration
+    class PaymentMethodEntityTypeConfiguration : BaseConfiguration<PaymentMethod>
-        : IEntityTypeConfiguration<PaymentMethod>
     {
-        public void Configure(EntityTypeBuilder<PaymentMethod> paymentConfiguration)
+        public override void Configure(EntityTypeBuilder<PaymentMethod> paymentConfiguration)
         {
             paymentConfiguration.ToTable("paymentmethods", OrderingContext.DEFAULT_SCHEMA);
 
-            paymentConfiguration.HasKey(b => b.Id);
-
-            paymentConfiguration.Ignore(b => b.DomainEvents);
-
             paymentConfiguration.Property(b => b.Id)
                 .UseHiLo("paymentseq", OrderingContext.DEFAULT_SCHEMA);
 
@@ -60,6 +55,8 @@ namespace Ordering.Infrastructure.EntityConfigurations
             paymentConfiguration.HasOne(p => p.CardType)
                 .WithMany()
                 .HasForeignKey("_cardTypeId");
+
+            base.Configure(paymentConfiguration);
         }
     }
 }