Sybren A. Stüvel 0ea3cf8c3f Worker: perform database migrations with Goose
Replace the GORM auto-migration with Goose. The latter uses hand-written
SQL files to migrate the database with understandable, explicit queries.
2023-12-14 10:13:42 +01:00

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# SQL Migrations
The files here are run by [Goose][goose], the database migration tool.
[goose]: https://pkg.go.dev/github.com/pressly/goose/v3
These are embedded into the Flamenco Worker executable, and automatically run on
startup.
## Foreign Key Constraints
Foreign Key constraints (FKCs) are optional in SQLite, and always enabled by
Flamenco Worker. These are temporarily disabled during database migration
itself. This means you can replace a table like this, without `ON DELETE`
effects running.
```sql
INSERT INTO `temp_table` SELECT * FROM `actual_table`;
DROP TABLE `actual_table`;
ALTER TABLE `temp_table` RENAME TO `actual_table`;
```