A unit test project that tests owned entities in EF Core

The tests currently pass with 2.2.6 but fail with 3.0.0-preview7.19362.6.

Swap out these versions in the csproj file to see the failing behavior in the 3.x version:

    <!--<PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="3.0.0-preview7.19362.6" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="3.0.0-preview7.19362.6" />-->
    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="2.2.6" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="2.2.6" />

This is related to this GitHub issue, which claims the issue is fixed in a current nightly build as of 9 August 2019.

These are integration tests, not unit tests. They require a database to work.

• Clone the repo.
• Build it (dotnet build)
• Make sure you have dotnet ef installed. Learn more.
  • $ dotnet tool install --global dotnet-ef --version 3.0.0-*
• Run dotnet ef database update
• Run the tests (dotnet test)

• Swap out the packages
• You'll initially get System.InvalidOperationException : The type 'Limb' cannot be marked as owned because a non-owned entity type with the same name already exists. You can get around this by commenting out these lines in MyDbContext.cs:

    //modelBuilder.Entity<Limb>()
    //    .HasKey(l => l.Id);

(for some reason migrations were complaining about Limb not having a key until we added this)

With the preview7 build you'll see that the owned entities are never loaded, even when explicitly included.

2.x requires the Limb .HasKey code or else you get this: System.InvalidOperationException : The entity type 'Limb' requires a primary key to be defined.