diff --git a/samples/apis/Backet.Api/Backet.Api.csproj b/samples/apis/Backet.Api/Backet.Api.csproj
index a084f9d..4a5489f 100644
--- a/samples/apis/Backet.Api/Backet.Api.csproj
+++ b/samples/apis/Backet.Api/Backet.Api.csproj
@@ -9,6 +9,12 @@
     <Compile Remove="Migrations\20200117082211_Init.Designer.cs" />
     <Compile Remove="Migrations\20200117091659_Set_Backet_BacketItem_IsRequired_false.cs" />
     <Compile Remove="Migrations\20200117091659_Set_Backet_BacketItem_IsRequired_false.Designer.cs" />
+    <Compile Remove="Migrations\20200119012712_Remove_BacketItem_FK_Constraint.cs" />
+    <Compile Remove="Migrations\20200119012712_Remove_BacketItem_FK_Constraint.Designer.cs" />
+    <Compile Remove="Migrations\20200119013717_Remove_BacketItem_FK_Constraint.cs" />
+    <Compile Remove="Migrations\20200119013717_Remove_BacketItem_FK_Constraint.Designer.cs" />
+    <Compile Remove="Migrations\20200119020005_Update_BacketItem_FK_Constraint.cs" />
+    <Compile Remove="Migrations\20200119020005_Update_BacketItem_FK_Constraint.Designer.cs" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/samples/apis/Backet.Api/Domain/AggregatesModel/BacketAggregate/Backet.cs b/samples/apis/Backet.Api/Domain/AggregatesModel/BacketAggregate/Backet.cs
index 337d40f..b716eb7 100644
--- a/samples/apis/Backet.Api/Domain/AggregatesModel/BacketAggregate/Backet.cs
+++ b/samples/apis/Backet.Api/Domain/AggregatesModel/BacketAggregate/Backet.cs
@@ -9,7 +9,7 @@ namespace Backet.Api.Domain.AggregatesModel.BacketAggregate
     public class Backet: Entity,IAggregateRoot
     {
         public string UserId { get; set; }
-        public IReadOnlyCollection<BacketItem> BacketItems { get; private set; }
+        public IEnumerable<BacketItem> BacketItems { get; private set; }
         public long TotalPrice { get; set; }
     }
 }
diff --git a/samples/apis/Backet.Api/Domain/AggregatesModel/BacketAggregate/BacketItem.cs b/samples/apis/Backet.Api/Domain/AggregatesModel/BacketAggregate/BacketItem.cs
index d9c54ae..f9953f5 100644
--- a/samples/apis/Backet.Api/Domain/AggregatesModel/BacketAggregate/BacketItem.cs
+++ b/samples/apis/Backet.Api/Domain/AggregatesModel/BacketAggregate/BacketItem.cs
@@ -11,5 +11,6 @@ namespace Backet.Api.Domain.AggregatesModel.BacketAggregate
         public string ProductId { get; set; }
         public string ProductName { get; set; }
         public long Price { get; set; }
+        public string BacketId { get; set; }
     }
 }
diff --git a/samples/apis/Backet.Api/Infrastructure/EntityConfigurations/BacketEntityTypeConfiguration.cs b/samples/apis/Backet.Api/Infrastructure/EntityConfigurations/BacketEntityTypeConfiguration.cs
index f4e5996..282a6cd 100644
--- a/samples/apis/Backet.Api/Infrastructure/EntityConfigurations/BacketEntityTypeConfiguration.cs
+++ b/samples/apis/Backet.Api/Infrastructure/EntityConfigurations/BacketEntityTypeConfiguration.cs
@@ -15,7 +15,7 @@ namespace Backet.Api.Infrastructure.EntityConfigurations
 
             builder.Property(m => m.Id).HasMaxLength(32);
             builder.Property(m => m.UserId).HasMaxLength(32).IsRequired();
-            builder.HasMany(m => m.BacketItems).WithOne();
+            builder.HasMany(m => m.BacketItems).WithOne().IsRequired().OnDelete(DeleteBehavior.Cascade).HasForeignKey("BacketId");
 
             builder.Ignore(m => m.DomainEvents);
 
diff --git a/samples/apis/Backet.Api/Infrastructure/EntityConfigurations/BacketItemEntityTypeConfiguration.cs b/samples/apis/Backet.Api/Infrastructure/EntityConfigurations/BacketItemEntityTypeConfiguration.cs
index 51dff27..0d97721 100644
--- a/samples/apis/Backet.Api/Infrastructure/EntityConfigurations/BacketItemEntityTypeConfiguration.cs
+++ b/samples/apis/Backet.Api/Infrastructure/EntityConfigurations/BacketItemEntityTypeConfiguration.cs
@@ -17,6 +17,7 @@ namespace Backet.Api.Infrastructure.EntityConfigurations
             builder.Property(m => m.Id).HasMaxLength(32);
             builder.Property(m => m.ProductId).HasMaxLength(32);
             builder.Property(m => m.ProductName).HasMaxLength(256).IsRequired();
+            builder.Property(m => m.BacketId).HasMaxLength(32).IsRequired();
 
             builder.Ignore(m => m.DomainEvents);
 
diff --git a/samples/apis/Backet.Api/Migrations/20200119013821_Remove_BacketItem_FK_Constraint.Designer.cs b/samples/apis/Backet.Api/Migrations/20200119013821_Remove_BacketItem_FK_Constraint.Designer.cs
new file mode 100644
index 0000000..4d17eb9
--- /dev/null
+++ b/samples/apis/Backet.Api/Migrations/20200119013821_Remove_BacketItem_FK_Constraint.Designer.cs
@@ -0,0 +1,86 @@
+// <auto-generated />
+using Backet.Api.Infrastructure;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+namespace Backet.Api.Migrations
+{
+    [DbContext(typeof(BacketDbContext))]
+    [Migration("20200119013821_Remove_BacketItem_FK_Constraint")]
+    partial class Remove_BacketItem_FK_Constraint
+    {
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn)
+                .HasAnnotation("ProductVersion", "3.1.0")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            modelBuilder.Entity("Backet.Api.Domain.AggregatesModel.BacketAggregate.Backet", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("character varying(32)")
+                        .HasMaxLength(32);
+
+                    b.Property<long>("TotalPrice")
+                        .HasColumnType("bigint");
+
+                    b.Property<string>("UserId")
+                        .IsRequired()
+                        .HasColumnType("character varying(32)")
+                        .HasMaxLength(32);
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Backet");
+                });
+
+            modelBuilder.Entity("Backet.Api.Domain.AggregatesModel.BacketAggregate.BacketItem", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("character varying(32)")
+                        .HasMaxLength(32);
+
+                    b.Property<string>("BacketId")
+                        .IsRequired()
+                        .HasColumnType("character varying(32)")
+                        .HasMaxLength(32);
+
+                    b.Property<long>("Price")
+                        .HasColumnType("bigint");
+
+                    b.Property<string>("ProductId")
+                        .HasColumnType("character varying(32)")
+                        .HasMaxLength(32);
+
+                    b.Property<string>("ProductName")
+                        .IsRequired()
+                        .HasColumnType("character varying(256)")
+                        .HasMaxLength(256);
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("BacketId");
+
+                    b.HasIndex("ProductId");
+
+                    b.ToTable("BacketItem");
+                });
+
+            modelBuilder.Entity("Backet.Api.Domain.AggregatesModel.BacketAggregate.BacketItem", b =>
+                {
+                    b.HasOne("Backet.Api.Domain.AggregatesModel.BacketAggregate.Backet", null)
+                        .WithMany("BacketItems")
+                        .HasForeignKey("BacketId")
+                        .OnDelete(DeleteBehavior.Restrict);
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/samples/apis/Backet.Api/Migrations/20200119013821_Remove_BacketItem_FK_Constraint.cs b/samples/apis/Backet.Api/Migrations/20200119013821_Remove_BacketItem_FK_Constraint.cs
new file mode 100644
index 0000000..e1f560b
--- /dev/null
+++ b/samples/apis/Backet.Api/Migrations/20200119013821_Remove_BacketItem_FK_Constraint.cs
@@ -0,0 +1,30 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+namespace Backet.Api.Migrations
+{
+    public partial class Remove_BacketItem_FK_Constraint : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AlterColumn<string>(
+                name: "BacketId",
+                table: "BacketItem",
+                maxLength: 32,
+                nullable: false,
+                oldClrType: typeof(string),
+                oldType: "character varying(32)",
+                oldNullable: true);
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AlterColumn<string>(
+                name: "BacketId",
+                table: "BacketItem",
+                type: "character varying(32)",
+                nullable: true,
+                oldClrType: typeof(string),
+                oldMaxLength: 32);
+        }
+    }
+}
diff --git a/samples/apis/Backet.Api/Migrations/20200119020249_Update_BacketItem_FK_Constraint.Designer.cs b/samples/apis/Backet.Api/Migrations/20200119020249_Update_BacketItem_FK_Constraint.Designer.cs
new file mode 100644
index 0000000..446f16c
--- /dev/null
+++ b/samples/apis/Backet.Api/Migrations/20200119020249_Update_BacketItem_FK_Constraint.Designer.cs
@@ -0,0 +1,87 @@
+// <auto-generated />
+using Backet.Api.Infrastructure;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+namespace Backet.Api.Migrations
+{
+    [DbContext(typeof(BacketDbContext))]
+    [Migration("20200119020249_Update_BacketItem_FK_Constraint")]
+    partial class Update_BacketItem_FK_Constraint
+    {
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn)
+                .HasAnnotation("ProductVersion", "3.1.0")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            modelBuilder.Entity("Backet.Api.Domain.AggregatesModel.BacketAggregate.Backet", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("character varying(32)")
+                        .HasMaxLength(32);
+
+                    b.Property<long>("TotalPrice")
+                        .HasColumnType("bigint");
+
+                    b.Property<string>("UserId")
+                        .IsRequired()
+                        .HasColumnType("character varying(32)")
+                        .HasMaxLength(32);
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Backet");
+                });
+
+            modelBuilder.Entity("Backet.Api.Domain.AggregatesModel.BacketAggregate.BacketItem", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("character varying(32)")
+                        .HasMaxLength(32);
+
+                    b.Property<string>("BacketId")
+                        .IsRequired()
+                        .HasColumnType("character varying(32)")
+                        .HasMaxLength(32);
+
+                    b.Property<long>("Price")
+                        .HasColumnType("bigint");
+
+                    b.Property<string>("ProductId")
+                        .HasColumnType("character varying(32)")
+                        .HasMaxLength(32);
+
+                    b.Property<string>("ProductName")
+                        .IsRequired()
+                        .HasColumnType("character varying(256)")
+                        .HasMaxLength(256);
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("BacketId");
+
+                    b.HasIndex("ProductId");
+
+                    b.ToTable("BacketItem");
+                });
+
+            modelBuilder.Entity("Backet.Api.Domain.AggregatesModel.BacketAggregate.BacketItem", b =>
+                {
+                    b.HasOne("Backet.Api.Domain.AggregatesModel.BacketAggregate.Backet", null)
+                        .WithMany("BacketItems")
+                        .HasForeignKey("BacketId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/samples/apis/Backet.Api/Migrations/20200119020249_Update_BacketItem_FK_Constraint.cs b/samples/apis/Backet.Api/Migrations/20200119020249_Update_BacketItem_FK_Constraint.cs
new file mode 100644
index 0000000..0e70f20
--- /dev/null
+++ b/samples/apis/Backet.Api/Migrations/20200119020249_Update_BacketItem_FK_Constraint.cs
@@ -0,0 +1,37 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+namespace Backet.Api.Migrations
+{
+    public partial class Update_BacketItem_FK_Constraint : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_BacketItem_Backet_BacketId",
+                table: "BacketItem");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_BacketItem_Backet_BacketId",
+                table: "BacketItem",
+                column: "BacketId",
+                principalTable: "Backet",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Cascade);
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_BacketItem_Backet_BacketId",
+                table: "BacketItem");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_BacketItem_Backet_BacketId",
+                table: "BacketItem",
+                column: "BacketId",
+                principalTable: "Backet",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+        }
+    }
+}
diff --git a/samples/apis/Backet.Api/Migrations/BacketDbContextModelSnapshot.cs b/samples/apis/Backet.Api/Migrations/BacketDbContextModelSnapshot.cs
index a6b706d..50ee5b9 100644
--- a/samples/apis/Backet.Api/Migrations/BacketDbContextModelSnapshot.cs
+++ b/samples/apis/Backet.Api/Migrations/BacketDbContextModelSnapshot.cs
@@ -46,7 +46,9 @@ namespace Backet.Api.Migrations
                         .HasMaxLength(32);
 
                     b.Property<string>("BacketId")
-                        .HasColumnType("character varying(32)");
+                        .IsRequired()
+                        .HasColumnType("character varying(32)")
+                        .HasMaxLength(32);
 
                     b.Property<long>("Price")
                         .HasColumnType("bigint");
@@ -73,7 +75,9 @@ namespace Backet.Api.Migrations
                 {
                     b.HasOne("Backet.Api.Domain.AggregatesModel.BacketAggregate.Backet", null)
                         .WithMany("BacketItems")
-                        .HasForeignKey("BacketId");
+                        .HasForeignKey("BacketId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
                 });
 #pragma warning restore 612, 618
         }