Applies the pending migrations in order, each in its own transaction, and returns how many it
applied. An advisory lock keeps two processes from migrating at once. It refuses (applying
nothing) when an applied migration changed or disappeared, or a pending one is numbered below
the newest applied one, unless options allows it.
- c: the connection to migrate.
- migrations: all the migrations, applied or not.
- options: what to allow.
migrate :: (
c: *Connection,
migrations: [] Migration,
options := Migrate_Options.{}
) -> (applied: s64, Pg_Error)Applies the pending migrations in order, each in its own transaction, and returns how many it
applied. An advisory lock keeps two processes from migrating at once. It refuses (applying
nothing) when an applied migration changed or disappeared, or a pending one is numbered below
the newest applied one, unless options allows it.
Parameters
- c: *Connection
- the connection to migrate.
- migrations: [] Migration
- all the migrations, applied or not.
- options := Migrate_Options.{}
- what to allow.
Returns
- applied: s64