Entity Framework Tooling: GraphDiff

While looking for a good solution to save a detached object tree using Entity Framework, I found the perfect solution:GraphDiff.
GraphDiff offers a set of DbContext extension methods for Entity Framework Code First, that allow you to save an entire detached Model/Entity, with child Entities and Lists, to the database without writing the code to do it. It has the following features to offer:

• Merge an entire graph of detached entities to the database using DbContext.UpdateGraph();
• Ensures concurrency is maintained for all child entities in the graph
• Allows for different configuration mappings to ensure that only changes within the defined graph are persisted
• Comprehensive testing suite to cover many (un/)common scenarios.

GraphDiff is really easy to use. Just take your object tree and tell Entity Framework how to attach the child objects:

	[Route()]
	public IHttpActionResult Post(RoleAssignment roleAssignment)
	{
	//Existing role
	_context.UpdateGraph(roleAssignment, map => map
	.OwnedCollection(r => r.ActiveDirectoryItems)
	.OwnedEntity(r => r.Role, withRole => withRole
	.OwnedCollection(r => r.Operations)
	.OwnedCollection(r => r.Tasks, withTask => withTask
	.OwnedCollection(t => t.Operations))));
	_context.SaveChanges();
	return Ok();
	}

view raw PostRole.cs hosted with ❤ by GitHub

More information here: http://blog.brentmckendrick.com/introducing-graphdiff-for-entity-framework-code-first-allowing-automated-updates-of-a-graph-of-detached-entities/

This is a must have for every Entity Framework user!