"""nullable project for api token

Revision ID: 770149d96e24

Revises: 11470abae0d6

Create Date: 2017-03-04 18:05:07.956057

"""

# revision identifiers, used by Alembic.

revision = '770149d96e24'

down_revision = '11470abae0d6'

from alembic import op

import sqlalchemy as sa

def upgrade():

    """ Make the field 'project_id' of the table tokens be nullable. """

    op.alter_column(

        'tokens',

        'project_id',

        nullable=True,

        existing_nullable=False,

    )

def downgrade():

    """ Make the field 'project_id' of the table tokens be not nullable.

    """

    op.alter_column(

        'tokens',

        'project_id',

        nullable=False,

        existing_nullable=True,

    )