Custom OpenIddictApplication field always returns null - openiddict

Question

I am using OpenIDDict and extending OpenIddictEntityFrameworkCoreApplication to include my own custom field:
public class TenantApplication : OpenIddictEntityFrameworkCoreApplication<long, TenantAuthorization, TenantToken> {
public long? TenantID { get; set; }
}
public class TenantAuthorization : OpenIddictEntityFrameworkCoreAuthorization<long, TenantApplication, TenantToken> { }
public class TenantScope : OpenIddictEntityFrameworkCoreScope<long> { }
public class TenantToken : OpenIddictEntityFrameworkCoreToken<long, TenantApplication, TenantAuthorization> { }
I register under AddDbContext:
builder.Services.AddDbContext<ApplicationDbContext>(options => {
options.UseNpgsql(connectionString);
options.UseOpenIddict<TenantApplication, TenantAuthorization, TenantScope, TenantToken, long>();
});
and also under AddCore:
// Register the OpenIddict core components.
.AddCore(options =>
options.UseEntityFrameworkCore()
.UseDbContext<ApplicationDbContext>()
.ReplaceDefaultEntities<TenantApplication, TenantAuthorization, TenantScope, TenantToken, long>();
options.UseQuartz();
})
In my Worker, I create the application record if it doesn't exist, but TenantID is always inserted with null:
if (await manager.FindByClientIdAsync("postman", cancellationToken) is null)
{
await manager.CreateAsync(new TokenOpenIddictApplicationDescriptor
{
TenantID = 2,
ClientId = "postman",
ClientSecret = "388D45FA-B36B-4988-BA59-B187D329C207",
DisplayName = "My client application",
Permissions =
{
Permissions.Endpoints.Token,
Permissions.GrantTypes.ClientCredentials
}
});
Similarly, manager.FindByClientIdAsync also returns the Application instance with a null TenantID (after I manually set it in the db). What step am I missing?

Answer 1

I figured this out on my own by diving into the OpenIDDict source code. In order to extend the Application fields, I extended OpenIddictApplicationManager and OpenIddictEntityFrameworkCoreApplicationStore. OpenIddictApplicationManager has a PopulateAsync method which converts a OpenIddictApplicationDescriptor to an Application instance. You need to override this method so that your custom Application fields will be set.
When initializing everything in Program.cs you also need to add your custom store and replace the application manager.
options.AddApplicationStore<TenantOpenIddictEntityFrameworkCoreApplicationStore>();
options.ReplaceApplicationManager<TenantOpenIddictApplicationManager>();
Maybe there is a better way of doing this, but this worked for me. It would be nice if there was some more easier to find examples with more complex scenarios.