EF Core records all applied migrations in a special history table, allowing it to know which migrations have been applied and which haven't. Once a new migration has been generated, it can be applied to a database in various ways.EF Core compares the current model against a snapshot of the old model to determine the differences, and generates migration source files the files can be tracked in your project's source control like any other source file. When a data model change is introduced, the developer uses EF Core tools to add a corresponding migration describing the updates necessary to keep the database schema in sync.The migrations feature in EF Core provides a way to incrementally update the database schema to keep it in sync with the application's data model while preserving existing data in the database.Īt a high level, migrations function in the following way: In real world projects, data models change as features get implemented: new entities or properties are added and removed, and database schemas need to be changed accordingly to be kept in sync with the application.
