Entity type does not contain any property marked with KeyAttribute

[Kiran Randhawa]

Hey so I was trying to use this with a model first generated edmx project.

I get the error:
System.InvalidOperationException: 'Entity type City does not contain any property marked with KeyAttribute'

City does indeed have an id which is marked as a key but looking at the entity I see this:

//------------------------------------------------------------------------------
// <auto-generated>
//     This code was generated from a template.
//
//     Manual changes to this file may cause unexpected behavior in your application.
//     Manual changes to this file will be overwritten if the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------

namespace CityWeather.Data.Entities
{
    using System;
    using System.Collections.Generic;
    
    public partial class City
    {
        public int Id { get; set; }
        public string Name { get; set; }
    }
}

So I can't seem to use your library for what I want to do it seems. Is that right? I'm guessing this is expecting a code first approach?

[Kiran Randhawa]

I managed to solve this myself by following the steps here:

https://stackoverflow.com/questions/16100418/entity-framework-5-does-not-generate-key-attribute

You can modify the way your EF files are generated. It's a bit hacky but good enough for me 👍

[huysentruitw]

There is an overload of CreateDbSetMock that let's you pass in a custom key factory which could be used in this case:

dbContextMock.CreateDbSetMock(x => x.Cities, (entity, _) => entity.Id);

If you don't pass a custom key factory, the default attribute-based key factory is being used which throws that exception you've mentioned.

[Kiran Randhawa]

Thank you for this! I'll change my code and re implement that today!