Use Include() method in repository

Question

I have the following with EF 5:

var a = context.Posts.Include(x => x.Pack).Select(x => x.Pack.Id).ToList();

This works. Then I tried

Answer 1

Try:

Change

Expression> criteria

To

Expression> criteria

Edit: To Include multiple entities, you need to add an "include" extension:

public static class IncludeExtension
{
    public static IQueryable Include(this IDbSet dbSet,
                                            params Expression>[] includes)
                                            where TEntity : class
    {
        IQueryable query = null;
        foreach (var include in includes)
        {
            query = dbSet.Include(include);
        }

        return query == null ? dbSet : query;
    }
}

Then you can use it like this:

repository.Include(x => x.Pack, x => x.Pack.Roles, ...).Select(x => x.Pack.Id).ToList();

Just make sure "repository" return a "DbSet" Object.