Исправление ошибок(mealplanId теперь может принимать значение null)

Hotel/HotelContracts/BindingModels/RoomBindingModel.cs

@@ -12,7 +12,7 @@ namespace HotelContracts.BindingModels
 
         public int HeadwaiterId { get; set; }
 
-        public int MealPlanId { get; set; }
+        public int? MealPlanId { get; set; }
 
         public int Id { get; set; }
         public Dictionary<int, IDinnerModel> RoomDinners { get; set; } = new();

Hotel/HotelContracts/ViewModels/MealPlanViewModel.cs

@@ -21,7 +21,7 @@ namespace HotelContracts.ViewModels
 
         public MealPlanViewModel() { }
 
-        //[JsonConstructor]
+        [JsonConstructor]
         public MealPlanViewModel(Dictionary<int, MemberViewModel> MealPlanMembers)
         {
             this.MealPlanMembers = MealPlanMembers.ToDictionary(x => x.Key, x => x.Value as IMemberModel);

Hotel/HotelContracts/ViewModels/RoomViewModel.cs

@@ -9,7 +9,7 @@ namespace HotelContracts.ViewModels
     {
         public int HeadwaiterId { get; set; }
 
-        public int MealPlanId { get; set; }
+        public int? MealPlanId { get; set; }
 
         public int Id { get; set; }
 
@@ -26,7 +26,7 @@ namespace HotelContracts.ViewModels
         public RoomViewModel() { }
 
         [JsonConstructor]
-        public RoomViewModel(Dictionary<int, DinnerViewModel> RoomMembers)
+        public RoomViewModel(Dictionary<int, DinnerViewModel> RoomDinners)
         {
             this.RoomDinners = RoomDinners.ToDictionary(x => x.Key, x => x.Value as IDinnerModel);
         }

Hotel/HotelDataBaseImplement/HotelDataBase.cs

@@ -9,7 +9,7 @@ namespace HotelDataBaseImplement
         {
             if (optionsBuilder.IsConfigured == false)
             {
-                optionsBuilder.UseSqlServer(@"Data Source=DESKTOP-V0ON61E\SQLEXPRESS;Initial Catalog=HotelDataBaseFul;Integrated Security=True;MultipleActiveResultSets=True;;TrustServerCertificate=True");
+                optionsBuilder.UseSqlServer(@"Data Source=DESKTOP-VG5USAH\SQLEXPRESS;Initial Catalog=HotelDataBaseFull;Integrated Security=True;MultipleActiveResultSets=True;;TrustServerCertificate=True");
             }
             base.OnConfiguring(optionsBuilder);
         }

Hotel/HotelDataBaseImplement/Migrations/20230516050151_TempMigr.cs

@@ -11,7 +11,7 @@ namespace HotelDataBaseImplement.Migrations
         protected override void Up(MigrationBuilder migrationBuilder)
         {
             migrationBuilder.RenameColumn(
-                name: "DinnetPrice",
+                name: "DinnerPrice",
                 table: "Dinners",
                 newName: "DinnerPrice");
         }

Hotel/HotelDataBaseImplement/Migrations/20230517064309_NullMealPlanId.Designer.cs

@@ -0,0 +1,567 @@
+// <auto-generated />
+using System;
+using HotelDataBaseImplement;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace HotelDataBaseImplement.Migrations
+{
+    [DbContext(typeof(HotelDataBase))]
+    [Migration("20230517064309_NullMealPlanId")]
+    partial class NullMealPlanId
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "7.0.5")
+                .HasAnnotation("Relational:MaxIdentifierLength", 128);
+
+            SqlServerModelBuilderExtensions.UseIdentityColumns(modelBuilder);
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.Conference", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("ConferenceName")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<int>("OrganiserId")
+                        .HasColumnType("int");
+
+                    b.Property<DateTime>("StartDate")
+                        .HasColumnType("datetime2");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("OrganiserId");
+
+                    b.ToTable("Conferences");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.ConferenceBooking", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("ConferenceId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("HeadwaiterId")
+                        .HasColumnType("int");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ConferenceId");
+
+                    b.HasIndex("HeadwaiterId");
+
+                    b.ToTable("ConferenceBookings");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.ConferenceBookingDinner", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("ConferenceBookingId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("Count")
+                        .HasColumnType("int");
+
+                    b.Property<int>("DinnerId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("DinnercId")
+                        .HasColumnType("int");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ConferenceBookingId");
+
+                    b.HasIndex("DinnercId");
+
+                    b.ToTable("ConferenceBookingDinners");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.ConferenceMember", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("ConferenceId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("MemberId")
+                        .HasColumnType("int");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ConferenceId");
+
+                    b.HasIndex("MemberId");
+
+                    b.ToTable("ConferenceMembers");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.Dinner", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("DinnerName")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<double>("DinnerPrice")
+                        .HasColumnType("float");
+
+                    b.Property<int>("HeadwaiterId")
+                        .HasColumnType("int");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("HeadwaiterId");
+
+                    b.ToTable("Dinners");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.Headwaiter", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("HeadwaiterEmail")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("HeadwaiterFIO")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("HeadwaiterLogin")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("HeadwaiterNumber")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("HeadwaiterPassword")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Headwaiters");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.MealPlan", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("MealPlanName")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<double>("MealPlanPrice")
+                        .HasColumnType("float");
+
+                    b.Property<int>("OrganiserId")
+                        .HasColumnType("int");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("OrganiserId");
+
+                    b.ToTable("MealPlans");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.MealPlanMember", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("MealPlanId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("MemberId")
+                        .HasColumnType("int");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("MealPlanId");
+
+                    b.HasIndex("MemberId");
+
+                    b.ToTable("MealPlanMembers");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.Member", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Citizenship")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("MemberFIO")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<int>("OrganiserId")
+                        .HasColumnType("int");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("OrganiserId");
+
+                    b.ToTable("Members");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.Organiser", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("OrganiserEmail")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("OrganiserFIO")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("OrganiserLogin")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("OrganiserNumber")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("OrganiserPassword")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Organisers");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.Room", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("HeadwaiterId")
+                        .HasColumnType("int");
+
+                    b.Property<int?>("MealPlanId")
+                        .HasColumnType("int");
+
+                    b.Property<string>("RoomFrame")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("RoomName")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<double>("RoomPrice")
+                        .HasColumnType("float");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("HeadwaiterId");
+
+                    b.HasIndex("MealPlanId");
+
+                    b.ToTable("Rooms");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.RoomDinner", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("Count")
+                        .HasColumnType("int");
+
+                    b.Property<int>("DinnerId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("RoomId")
+                        .HasColumnType("int");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("DinnerId");
+
+                    b.HasIndex("RoomId");
+
+                    b.ToTable("RoomDinners");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.Conference", b =>
+                {
+                    b.HasOne("HotelDataBaseImplement.Models.Organiser", "Organiser")
+                        .WithMany("Conferences")
+                        .HasForeignKey("OrganiserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Organiser");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.ConferenceBooking", b =>
+                {
+                    b.HasOne("HotelDataBaseImplement.Models.Conference", "Conference")
+                        .WithMany("ConferenceBookings")
+                        .HasForeignKey("ConferenceId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("HotelDataBaseImplement.Models.Headwaiter", "Headwaiter")
+                        .WithMany("ConferenceBookings")
+                        .HasForeignKey("HeadwaiterId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Conference");
+
+                    b.Navigation("Headwaiter");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.ConferenceBookingDinner", b =>
+                {
+                    b.HasOne("HotelDataBaseImplement.Models.ConferenceBooking", "ConferenceBooking")
+                        .WithMany("Dinners")
+                        .HasForeignKey("ConferenceBookingId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("HotelDataBaseImplement.Models.Dinner", "Dinner")
+                        .WithMany("ConferenceBookingDinner")
+                        .HasForeignKey("DinnercId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("ConferenceBooking");
+
+                    b.Navigation("Dinner");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.ConferenceMember", b =>
+                {
+                    b.HasOne("HotelDataBaseImplement.Models.Conference", "Conference")
+                        .WithMany("Members")
+                        .HasForeignKey("ConferenceId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("HotelDataBaseImplement.Models.Member", "Member")
+                        .WithMany("ConferenceMembers")
+                        .HasForeignKey("MemberId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Conference");
+
+                    b.Navigation("Member");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.Dinner", b =>
+                {
+                    b.HasOne("HotelDataBaseImplement.Models.Headwaiter", "Headwaiter")
+                        .WithMany("Dinners")
+                        .HasForeignKey("HeadwaiterId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Headwaiter");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.MealPlan", b =>
+                {
+                    b.HasOne("HotelDataBaseImplement.Models.Organiser", "Organiser")
+                        .WithMany("MealPlans")
+                        .HasForeignKey("OrganiserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Organiser");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.MealPlanMember", b =>
+                {
+                    b.HasOne("HotelDataBaseImplement.Models.MealPlan", "MealPlan")
+                        .WithMany("Members")
+                        .HasForeignKey("MealPlanId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("HotelDataBaseImplement.Models.Member", "Member")
+                        .WithMany("MealPlanMember")
+                        .HasForeignKey("MemberId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("MealPlan");
+
+                    b.Navigation("Member");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.Member", b =>
+                {
+                    b.HasOne("HotelDataBaseImplement.Models.Organiser", "Organiser")
+                        .WithMany("Members")
+                        .HasForeignKey("OrganiserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Organiser");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.Room", b =>
+                {
+                    b.HasOne("HotelDataBaseImplement.Models.Headwaiter", "Headwaiter")
+                        .WithMany("Rooms")
+                        .HasForeignKey("HeadwaiterId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("HotelDataBaseImplement.Models.MealPlan", "MealPlan")
+                        .WithMany("Rooms")
+                        .HasForeignKey("MealPlanId");
+
+                    b.Navigation("Headwaiter");
+
+                    b.Navigation("MealPlan");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.RoomDinner", b =>
+                {
+                    b.HasOne("HotelDataBaseImplement.Models.Dinner", "Dinner")
+                        .WithMany("RoomDinners")
+                        .HasForeignKey("DinnerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("HotelDataBaseImplement.Models.Room", "Room")
+                        .WithMany("Dinners")
+                        .HasForeignKey("RoomId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Dinner");
+
+                    b.Navigation("Room");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.Conference", b =>
+                {
+                    b.Navigation("ConferenceBookings");
+
+                    b.Navigation("Members");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.ConferenceBooking", b =>
+                {
+                    b.Navigation("Dinners");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.Dinner", b =>
+                {
+                    b.Navigation("ConferenceBookingDinner");
+
+                    b.Navigation("RoomDinners");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.Headwaiter", b =>
+                {
+                    b.Navigation("ConferenceBookings");
+
+                    b.Navigation("Dinners");
+
+                    b.Navigation("Rooms");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.MealPlan", b =>
+                {
+                    b.Navigation("Members");
+
+                    b.Navigation("Rooms");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.Member", b =>
+                {
+                    b.Navigation("ConferenceMembers");
+
+                    b.Navigation("MealPlanMember");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.Organiser", b =>
+                {
+                    b.Navigation("Conferences");
+
+                    b.Navigation("MealPlans");
+
+                    b.Navigation("Members");
+                });
+
+            modelBuilder.Entity("HotelDataBaseImplement.Models.Room", b =>
+                {
+                    b.Navigation("Dinners");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

Hotel/HotelDataBaseImplement/Migrations/20230517064309_NullMealPlanId.cs

@@ -0,0 +1,59 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace HotelDataBaseImplement.Migrations
+{
+    /// <inheritdoc />
+    public partial class NullMealPlanId : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_Rooms_MealPlans_MealPlanId",
+                table: "Rooms");
+
+            migrationBuilder.AlterColumn<int>(
+                name: "MealPlanId",
+                table: "Rooms",
+                type: "int",
+                nullable: true,
+                oldClrType: typeof(int),
+                oldType: "int");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Rooms_MealPlans_MealPlanId",
+                table: "Rooms",
+                column: "MealPlanId",
+                principalTable: "MealPlans",
+                principalColumn: "Id");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_Rooms_MealPlans_MealPlanId",
+                table: "Rooms");
+
+            migrationBuilder.AlterColumn<int>(
+                name: "MealPlanId",
+                table: "Rooms",
+                type: "int",
+                nullable: false,
+                defaultValue: 0,
+                oldClrType: typeof(int),
+                oldType: "int",
+                oldNullable: true);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Rooms_MealPlans_MealPlanId",
+                table: "Rooms",
+                column: "MealPlanId",
+                principalTable: "MealPlans",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Cascade);
+        }
+    }
+}

Hotel/HotelDataBaseImplement/Migrations/HotelDataBaseModelSnapshot.cs

@@ -17,7 +17,7 @@ namespace HotelDataBaseImplement.Migrations
         {
 #pragma warning disable 612, 618
             modelBuilder
-                .HasAnnotation("ProductVersion", "7.0.4")
+                .HasAnnotation("ProductVersion", "7.0.5")
                 .HasAnnotation("Relational:MaxIdentifierLength", 128);
 
             SqlServerModelBuilderExtensions.UseIdentityColumns(modelBuilder);
@@ -298,7 +298,7 @@ namespace HotelDataBaseImplement.Migrations
                     b.Property<int>("HeadwaiterId")
                         .HasColumnType("int");
 
-                    b.Property<int>("MealPlanId")
+                    b.Property<int?>("MealPlanId")
                         .HasColumnType("int");
 
                     b.Property<string>("RoomFrame")
@@ -386,7 +386,7 @@ namespace HotelDataBaseImplement.Migrations
                         .IsRequired();
 
                     b.HasOne("HotelDataBaseImplement.Models.Dinner", "Dinner")
-                        .WithMany("ConferenceBookingDinners")
+                        .WithMany("ConferenceBookingDinner")
                         .HasForeignKey("DinnercId")
                         .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
@@ -417,13 +417,13 @@ namespace HotelDataBaseImplement.Migrations
 
             modelBuilder.Entity("HotelDataBaseImplement.Models.Dinner", b =>
                 {
-                    b.HasOne("HotelDataBaseImplement.Models.Headwaiter", "Headwaiters")
+                    b.HasOne("HotelDataBaseImplement.Models.Headwaiter", "Headwaiter")
                         .WithMany("Dinners")
                         .HasForeignKey("HeadwaiterId")
                         .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
 
-                    b.Navigation("Headwaiters");
+                    b.Navigation("Headwaiter");
                 });
 
             modelBuilder.Entity("HotelDataBaseImplement.Models.MealPlan", b =>
@@ -477,9 +477,7 @@ namespace HotelDataBaseImplement.Migrations
 
                     b.HasOne("HotelDataBaseImplement.Models.MealPlan", "MealPlan")
                         .WithMany("Rooms")
-                        .HasForeignKey("MealPlanId")
-                        .OnDelete(DeleteBehavior.Cascade)
-                        .IsRequired();
+                        .HasForeignKey("MealPlanId");
 
                     b.Navigation("Headwaiter");
 
@@ -519,7 +517,7 @@ namespace HotelDataBaseImplement.Migrations
 
             modelBuilder.Entity("HotelDataBaseImplement.Models.Dinner", b =>
                 {
-                    b.Navigation("ConferenceBookingDinners");
+                    b.Navigation("ConferenceBookingDinner");
 
                     b.Navigation("RoomDinners");
                 });

Hotel/HotelDataBaseImplement/Models/Room.cs

@@ -20,11 +20,11 @@ namespace HotelDataBaseImplement.Models
         [Required]
         public double RoomPrice { get; set; } 
         public int HeadwaiterId { get; private set; }
-        public int MealPlanId { get; private set; }
+        public int? MealPlanId { get; private set; }
         public int Id { get; private set; }
 
         public virtual Headwaiter Headwaiter { get; set; }
-        public virtual MealPlan MealPlan { get; set; }
+        public virtual MealPlan? MealPlan { get; set; }
 
         [ForeignKey("RoomId")]
         public virtual List<RoomDinner> Dinners { get; set; }

Hotel/HotelDataModels/Models/IRoomModel.cs

@@ -7,7 +7,7 @@ namespace HotelDataModels.Models
         string RoomFrame { get; }
         double RoomPrice { get; }
         int HeadwaiterId { get; }
-        int MealPlanId { get; }
+        int? MealPlanId { get; }
         public Dictionary<int, IDinnerModel> RoomDinners { get; }
     }
 }