Commands for Alembic migrations

New Migration

Command

core_lib rev -n create_db

rev -n suggests new migration and the parameter after that will expect a name for the migration.

Outcome

This command will create a new migration with the name create_db.

Upgrade or Downgrade migrations

Command

core_lib rev -m head

rev -m suggests an existing migration and the parameter after that will expect the type of migration.

  • head
  • base
  • +1, +2 …, +10 : Mirgation upgrade versions
  • -1, -2 …, -10 : Mirgation downgrade versions

Outcome

This command will migrate to the specified version in the last parameter of the command.

Upgrade or Downgrade migrations

Command

core_lib rev -l

rev -l for listing the migration history.

Outcome

This command will list the migration history in a list format.