I am running my Node JS backend using typeorm ORM.
Coming from Entity Framework, it was very easy to seed the db with a few lines such as
Database.SetInitializer(new DbInitializer());
Where the DbInitializer class would contain all the seeding info.
Is there a similar approach to seed the database in TypeOrm? If not, what is the recommended way of doing it?
1) Create a new migration with the data insertion statements? 2) Create a task where you instantiate and save entities?
I would love to see such functionality as well (and we're not alone), but at the moment, there's no official feature for seeding.
in lack of such a built-in feature, I think the next best thing would be to create a migration script named 0-Seed (so it precedes any other migration scripts you might have) and have the seed data populated there.
@bitwit has created a snippet that may come in handy for you; it's a function that reads the data from yaml files, which you can incorporate in the seed migration script.
after some research, however, I found another interesting approach: bind an after_create event to the table, and initialize the data in the listener.
I haven't implemented this, so I'm not sure it can be done directly with TypeORM.