hallo

Desktop/hallo/LEA/Data/AppDbContext.cs

@@ -0,0 +1,37 @@
+using LEA.Models;
+using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore;
+
+namespace LEA.Data;
+
+public class AppDbContext : IdentityDbContext<ApplicationUser>
+{
+    public AppDbContext(DbContextOptions<AppDbContext> options) : base(options)
+    {
+    }
+
+    public DbSet<Application> Applications { get; set; } = null!;
+    public DbSet<Contact> Contacts { get; set; } = null!;
+
+    protected override void OnModelCreating(ModelBuilder builder)
+    {
+        base.OnModelCreating(builder);
+
+        builder.Entity<Application>()
+            .HasOne(a => a.User)
+            .WithMany()
+            .HasForeignKey(a => a.UserId)
+            .OnDelete(DeleteBehavior.Cascade);
+
+        builder.Entity<Application>()
+            .HasOne(a => a.Contact)
+            .WithOne(c => c.Application)
+            .HasForeignKey<Contact>(c => c.ApplicationId)
+            .OnDelete(DeleteBehavior.Cascade);
+
+        builder.Entity<Application>()
+            .Property(a => a.Status)
+            .HasConversion<string>()
+            .HasMaxLength(50);
+    }
+}