Add repro for #1224

src/Examples/JsonApiDotNetCoreExample/Data/AppDbContext.cs

@@ -10,6 +10,7 @@ namespace JsonApiDotNetCoreExample.Data;
 public sealed class AppDbContext : DbContext
 {
     public DbSet<TodoItem> TodoItems => Set<TodoItem>();
+    public DbSet<PostIt> PostIts => Set<PostIt>();
 
     public AppDbContext(DbContextOptions<AppDbContext> options)
         : base(options)

src/Examples/JsonApiDotNetCoreExample/Models/PostIt.cs

@@ -0,0 +1,25 @@
+using System.ComponentModel.DataAnnotations;
+using JsonApiDotNetCore.Resources;
+using JsonApiDotNetCore.Resources.Annotations;
+
+namespace JsonApiDotNetCoreExample.Models;
+
+[Resource]
+public class PostIt : Identifiable<int>
+{
+    [Attr]
+    [Required]
+    public bool Actif { get; set; }
+
+    [Attr]
+    [Required]
+    public DateTime Date { get; set; }
+
+    [Attr]
+    [MaxLength(2, ErrorMessage = "Error")]
+    public string Message { get; set; }
+
+    [Attr]
+    [Required]
+    public string RefOperateur { get; set; }
+}

src/Examples/JsonApiDotNetCoreExample/Program.cs

@@ -3,6 +3,7 @@
 using JsonApiDotNetCore.Configuration;
 using JsonApiDotNetCore.Diagnostics;
 using JsonApiDotNetCoreExample.Data;
+using JsonApiDotNetCoreExample.Models;
 using Microsoft.AspNetCore.Authentication;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.DependencyInjection.Extensions;
@@ -98,5 +99,20 @@ static async Task CreateDatabaseAsync(IServiceProvider serviceProvider)
     await using AsyncServiceScope scope = serviceProvider.CreateAsyncScope();
 
     var dbContext = scope.ServiceProvider.GetRequiredService<AppDbContext>();
+
+    await dbContext.Database.EnsureDeletedAsync();
     await dbContext.Database.EnsureCreatedAsync();
+
+    var postIt = new PostIt
+    {
+        Id = 835405,
+        Actif = true,
+        Date = DateTime.UtcNow,
+        Message = "ab",
+        RefOperateur = "some-ref"
+    };
+
+    dbContext.PostIts.Add(postIt);
+
+    await dbContext.SaveChangesAsync();
 }