Entity Framework Core - EF Core 2.2 - 'Point.Boundary' is of an interface type ('IGeometry')

Question

I am trying the new functionality with EF Core 2.2. It is based on the following article. \"Announcing Entity Framework Core 2.2\" https://blogs.msdn.microsoft.com/dotnet/20

Answer 1

As Kyle pointed out you need to call UseNetTopologySuite(), but I would call it during ConfigureServices like this:

public class Startup
{
    public void ConfigureServices(IServiceCollection services)
    {
        services
            .AddEntityFrameworkNpgsql()
            .AddDbContext<MyDBContext>(opt =>
                opt.UseNpgsql(Configuration.GetConnectionString("MyDBConnection"),
                                o=>o.UseNetTopologySuite()))
            .BuildServiceProvider();
        ...
    }
    ...
}

Answer 2

You need to call UseNetTopologySuite(). Example here:

public class ApplicationDbContext : IdentityDbContext
{
    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
        : base(options)
    {

    }

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        IConfigurationRoot configuration = new ConfigurationBuilder()
           .SetBasePath(Directory.GetCurrentDirectory())
           .AddJsonFile("appsettings.json")
           .Build();
        var connectionString = configuration.GetConnectionString("DefaultConnection");
        optionsBuilder.UseSqlServer(connectionString, opts => opts.UseNetTopologySuite());
    }
    public DbSet<Test> Tests { get; set; }
}


public class Test
{
    public int Id { get; set; }
    public Point Location { get; set; }
}

I ran into this problem because I had a if (!optionsBuilder.IsConfigured) around everything in my OnConfiguring. I had to remove this in order to get add-migrations to work.