- fk on release to exercise restrict

src/ClientServer/Db/YapexDbContext.cs

@@ -587,7 +587,7 @@ namespace ClientServer.Db
                 .WithOne(p => p.Exercise)
                 .HasForeignKey(p => p.ExerciseId)
                 .IsRequired()
-                .OnDelete(DeleteBehavior.Cascade)
+                .OnDelete(DeleteBehavior.Restrict)
                 ;
 
 

src/ClientServer/Migrations/20190830142059_EnsureNoReleaseDeleteEx.cs

+using System;
+using System.Collections.Generic;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+namespace ClientServer.Migrations
+{
+    public partial class EnsureNoReleaseDeleteEx : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_ExerciseReleases_Exercises_ExerciseId",
+                table: "ExerciseReleases");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_ExerciseReleases_Exercises_ExerciseId",
+                table: "ExerciseReleases",
+                column: "ExerciseId",
+                principalTable: "Exercises",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_ExerciseReleases_Exercises_ExerciseId",
+                table: "ExerciseReleases");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_ExerciseReleases_Exercises_ExerciseId",
+                table: "ExerciseReleases",
+                column: "ExerciseId",
+                principalTable: "Exercises",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Cascade);
+        }
+    }
+}

src/ClientServer/Migrations/YapexDbContextModelSnapshot.cs

@@ -4,6 +4,7 @@ using Microsoft.EntityFrameworkCore.Infrastructure;
 using Microsoft.EntityFrameworkCore.Metadata;
 using Microsoft.EntityFrameworkCore.Migrations;
 using ClientServer.Db;
+using ClientServer.Models.Exercises.Release;
 
 namespace ClientServer.Migrations
 {
@@ -1900,8 +1901,7 @@ namespace ClientServer.Migrations
                 {
                     b.HasOne("ClientServer.Models.Exercises.Exercise", "Exercise")
                         .WithMany("Releases")
-                        .HasForeignKey("ExerciseId")
-                        .OnDelete(DeleteBehavior.Cascade);
+                        .HasForeignKey("ExerciseId");
 
                     b.HasOne("ClientServer.Models.PLang", "PLang")
                         .WithMany()