How to query many-to-many releationship in EF Core

Question

I\'m using .NET Core and EF Core for a web project. I\'m struggling how to query a many-to-many releationship. This is what my models look like:

public class         


        

Answer 1

EF Core won't load related properties automatically, so you'll need to explicitly do this, but something like the following should do the trick:

var result = context.Begrip
    .Include(x => x.Categories)
    .ThenInclude(x => x.category);

Note, intellisense doesn't always work on .ThenInclude at the moment, but the code should still compile even if it gets a red underline.

If you're returning this to the view or an API, you'll likely want to map it to a DTO so you don't have to deal with .Categories[0].category.Name etc.