def downgrade(directory=None, revision="-1", sql=False, tag=None, x_arg=None):
from alembic import command
"""Revert to a previous version"""
config = get_config(directory, x_arg=x_arg)
if sql and revision == "-1":
revision = "head:-1"
command.downgrade(config, revision, sql=sql, tag=tag)
def migrate(
directory=None,
message=None,
sql=False,
head="head",
splice=False,
branch_label=None,
version_path=None,
rev_id=None,
x_arg=None,
):
from alembic import command
"""Alias for 'revision --autogenerate'"""
config = get_config(directory, opts=["autogenerate"], x_arg=x_arg)
command.revision(
config,
message,
autogenerate=True,
sql=sql,
head=head,
splice=splice,
branch_label=branch_label,
version_path=version_path,
rev_id=rev_id,
)
def history(directory=None,
rev_range=None,
verbose=False,
indicate_current=False):
"""List changeset scripts in chronological order."""
config = get_config(directory)
command.history(config,
rev_range,
verbose=verbose,
indicate_current=indicate_current)
def stamp(directory=None, revision="head", sql=False, tag=None):
from alembic import command
config = get_config(directory)
command.stamp(config, revision, sql=sql, tag=tag)
def upgrade(directory=None, revision="head", sql=False, tag=None, x_arg=None):
from alembic import command
"""Upgrade to a later version"""
config = get_config(directory, x_arg=x_arg)
command.upgrade(config, revision, sql=sql, tag=tag)
def current(directory=None, verbose=False, head_only=False):
"""Display the current revision for each database."""
config = get_config(directory)
command.current(config, verbose=verbose, head_only=head_only)
def show(directory=None, revision="head"):
"""Show the revision denoted by the given symbol."""
config = get_config(directory)
command.show(config, revision)
