CODEWITHSUNDEEP
unit-testingentity-framework
AnonyMouse
AnonyMouse

Reputation: 18650

Entity Framework error during unit test

I'm using the entity framework.

In one of my unit tests I have a line like:

this.Set<T>().Add(entity);

On executing that line I get:

System.InvalidOperationException : The model backing the 'InvoiceNewDataContext' context has changed since the database was created. Either manually delete/update the database, or call Database.SetInitializer with an IDatabaseInitializer instance. For example, the DropCreateDatabaseIfModelChanges strategy will automatically delete and recreate the database, and optionally seed it with new data.

Well I've actually deleted the database and removed the connection string.

I'm surprised this error is happening on adding as I wouldn't expect it to happen until I saved the data and it discovered there was no database.

In previous projects/solutions I created during unit tests I have been able to add to the context for test purposes without actually calling SaveChanges.

Would anyone know why this would be happening in my latest projects/solutions?

Upvotes: 1

Views: 535

Answers (1)

Ladislav Mrnka
Ladislav Mrnka

Reputation: 364409

Are you sure it really didn't use database in your previous projects? If you do not specify any connection string it will silently use a default one to SQLExpress database with local .mdf file so make sure that isn't happening now.

Upvotes: 1

Related Questions