MemoDb: Cascades and Collections support

I’ve been implementing some new features and I think it’s ready for an alpha release. I’ll be uploading the files in codeplex.

To follow the MemoDb posts saga:

• Introduction to MemoDb
• MemoDb: Collections support
• MemoDb: Auto assign id support

Now, MemoDb supports:

• Delete
• Collections
• EntityRef (for LinqToSql support)
• Cascade inserts
• Cascade delete on collections children (aka all-delete-orphans)

Delete
Pretty simple, it let you delete objects:

using (var s = memo.CreateSession())
{
	var city= s.GetById<City>(1);
	s.Delete(city);
	s.Flush();
}

Cascade Inserts
You can configure MemoDb to insert new references by default:

var memo = new Memo(insertByCascadeByDefault: true)

Or you can specify the behaviour just for one relationship:

 var memo = new Memo()
           .Map<City>(c => c.CasacadeInsert(x => x.Country))
           .Map<Country>();

Cascade Delete Orphans
You can configure MemoDb to delete collections children by cascade when the parent object is deleted by default:

var memo = new Memo(deleteOrphansByCascadeByDefault: true)

Or you can specify the behaviour just for one collection:

 var memo = new Memo()
           .Map<City>()
           .Map<Country>(c => c.CasacadeDeleteOrphans(x => x.Cities));

Advertisement