Entity Framewor Core Database.Setinitializer

Question

The Entity Framework Core has the Database.SetInitializer()?

Answer 1

It does not have this method that was previously used in the version Entity Framework 6.x, with the Entity Framework Core is used for the purposes of its context DbContextOptions (DbContextOptions<T>).

The Database.SetInitializer() is a way to inform which strategy to use on startup in your database with Code First and may vary its configuration:

• CreateDatabaseIfNotExists

  Create the database and its respective tables if they do not exist.

• DropCreateDatabaseIfModelChanges

  Deletes the database if there have been changes in its entities and creates again the database and its respective tables.

• DropCreateDatabaseAlways

  Deletes the database if it exists and re-creates every time your program was started, different from the previous one that only deletes the database if there is a change, in which case it deletes and re-creates its database.

• Custom DB Initializer

  Create an initializer or strategy with your own settings.

If you still want to cancel the strategy just write in the parameter null

Database.SetInitializer<DbContext>(null);

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In the Entity Framework Core it is simpler to call this initialization process with the methods:

• Database.EnsureCreated();

  Create the database and its respective tables if they do not exist.

• Database.EnsureDeleted();

  Excludes database if any.

_Reference:

• Database Initialization Strategies in EF 6 Code-First
• Setting up a Dbcontext