Question

I’ve added Entity Framework to an existing project with existing tables. These tables contains a couple of uniqueidentifier columns that is NULL. When I load data from these my model-property is also null and not Guid.Empty. I’ve tried setting the default value using both the constructor and

AlterColumn("tblItems", "ThreadRoot", c => c.Guid(nullable: true, defaultValue: Guid.Empty)); 

but it still return null.

How can I achieve this?

Answer 1

When I load data from these my model-property is also null and not Guid.Empty

That’s because the data already present will contain null, because they were stored before you issued the AlterColumn method. The default value will be written when a new record is inserted, when the appropriate column is not set.