Does Django's south (migration tool) work for innodb?

Question

$ py manage.py  migrate turkey
Running migrations for turkey:
 - Migrating forwards to 0001_initial.
 > turkey:0001_initial
 ! Error found during real run of migr         


        

Answer 1

InnoDB has constraints on Foreign Keys which ensure you are not breaking the database model when doing a migration. (see http://dev.mysql.com/doc/refman/5.5/en/innodb-foreign-key-constraints.html)

MyISAM does not have native support for constraints (although it seems you can implement this if you choose to do do http://dev.mysql.com/tech-resources/articles/mysql-enforcing-foreign-keys.html)

Because MyISAM is not checking your FK relationships, you do not get the error. InnoDB however is doing a check and it seems that you have a problem with your migration.