add Spatial support for EF6

[ocdi]

The default provider services doesn't have implementation for spatial services, without these any spatial queries fail. This is based on some work on the old github repo and extended to support selecting with spatial filters and returning spatial objects.

[yellis]

Can you give an example of how this would be used?

What are GetService() and GetServices() for and why do they need to be public?

[ocdi]

This patch is based on work from this SamSaffron/MiniProfiler#100

There is a post I made that was linked from there, however the page now returns a 404 (http://community.miniprofiler.com/permalinks/36/the-provider-did-not-return-a-dbspatialservices-instance)

To be honest I am not sure about the GetService() / GetServices(), but I figured since I was implementing overrides I would just complete the lot. I don't know if they are even being hit, but it is just calling _tail's version, which is the underlying DbProviderServices as far as I can see, so should enhance the overall behavour.

[yellis]

The new link for that post is here.

[ocdi]

Thanks for the new link - as you can see from that thread the two scenarios this fixes are the Where bit and the Select bit when the MiniProfiler EF6 is enabled:

public IQueryable<DbGeometry> GetWithin(DbGeometry geometry, int limit)
{
    return _dbContext.Features.Where(x => x.PolygonShape.Intersects(geometry))
        .Select(x => x.PolygonShape).Take(limit);
}

[yellis]

This is included in MiniProfiler.EF6 3.0.10-beta5