On Tue, Dec 18, 2018 at 4:02 AM Samir <selshark...@kpler.com> wrote: > > Hi all, > > Is there anyway to tell alembic to store the history of all applied > migrations and when they were applied instead of only saving the latest > migration ?
There's a request for this feature at https://github.com/sqlalchemy/alembic/issues/309 where I've described the implementation and we would welcome contributors who want to work on this relatively simple feature. You can also add this feature to an application right now by making use of the on_version_apply hook: https://alembic.sqlalchemy.org/en/latest/api/runtime.html#alembic.runtime.environment.EnvironmentContext.configure.params.on_version_apply to write records into your own "history" table. > > Is there a reason only the latest migration is saved in the `alembic_version` > table instead of saving the history of all applied migrations like django > migrations or other tools from other languages like flyway or liquibase ? because it's not necessary or relevant in order for Alembic to know what needs to be done for a particular database. The alembic_version table is concerned with storing the current state of the database, which is based on a non-linear versioning model. A particular database state may be represented across any number of heads, which can be moved up or down independently of each other, which is probably not the case for some/all the other tools you mentioned. A separate history table with a straight log of events that occurred is what people are looking for here and that should be a totally separate concern. > > Regards, > Samir > > -- > You received this message because you are subscribed to the Google Groups > "sqlalchemy-alembic" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sqlalchemy-alembic+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "sqlalchemy-alembic" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy-alembic+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
