DropCreateDatabaseIfModelChanges EF6 results in System.InvalidOperationException: The model backing the context has changed

Question

After migrating to Entity Framework 6 I get an error when executing unit tests on the build server.

I\'m using the DropCreateDatabaseIfModelChanges initiali

Answer 1

I found the same issue just after upgrading to EF6. After reading Stefan´s comment and having the same symptoms as he describes (tests were loading the Configuration class from my main project)

Solution/workaround in my case was to

• create new class TestContext: MyDataContext in my Tests project
• change the initialiser from DropCreateDatabaseAlways to DropCreateDatabaseAlways
• update/generalise places where I created my real context to use the test one

I could do this because most of my tests just extend from a PersistenceTest class, so I understand this might be a pain to change if you have a big catalog. So looking forward to other solutions