"""Drop checksum on ImageStorage

Revision ID: c91c564aad34
Revises: 152bb29a1bb3
Create Date: 2018-02-21 12:17:52.405644

"""

# revision identifiers, used by Alembic.
revision = 'c91c564aad34'
down_revision = '152bb29a1bb3'

from alembic import op
import sqlalchemy as sa


def upgrade(tables, tester):
    op.drop_column('imagestorage', 'checksum')


def downgrade(tables, tester):
    op.add_column('imagestorage', sa.Column('checksum', sa.String(length=255), nullable=True))