Unhandled handling when using Entity Framework Core with ASP.NET Core 6 - how to to create a proxy instance
Could someone explain Can someone help me understand I tried several approaches but none seem to work... After trying multiple solutions online, I still can't figure this out... I'm currently developing an ASP.NET Core 6 application using Entity Framework Core 6.0, and I encountered a question when trying to save changes to my database context. After I call `dbContext.SaveChangesAsync()`, I receive the following exception: ``` System.InvalidOperationException: Unable to create a proxy instance of type 'MyNamespace.Models.MyEntity'. The entity type is not part of the model for the current context. ``` This happens intermittently, specifically when I try to save a list of entities that I've modified and added to the `dbContext`. I've checked the model configuration, and it appears that I've registered everything correctly in the `OnModelCreating` method. Here’s a snippet of my code: ```csharp public class MyDbContext : DbContext { public DbSet<MyEntity> MyEntities { get; set; } protected override void OnModelCreating(ModelBuilder modelBuilder) { modelBuilder.Entity<MyEntity>().ToTable("MyEntities"); } } ``` I’m also initializing my DbContext like this: ```csharp services.AddDbContext<MyDbContext>(options => options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection"))); ``` To troubleshoot, I've attempted to: - Ensure that the database connection string is correct and the database is reachable. - Check that the `MyEntity` class is not abstract and does not have private setters for its properties. - Validate that all migrations are applied and the database schema is up to date using `Update-Database`. Despite these efforts, the question continues, particularly when dealing with multiple related entities. Sometimes, I manage to save data without issues, but other times, the behavior strikes again. Has anyone experienced this scenario with EF Core and found a workaround or solution? Thank you in advance for your help! I'm working on a API that needs to handle this. Is there a better approach? My development environment is Linux. Is there a better approach? I'm on Windows 10 using the latest version of Csharp. I appreciate any insights!