"""Add the _block_users field

Revision ID: 1a510f2216c0

Revises: 003fcd9e8860

Create Date: 2019-03-14 12:24:32.139377

"""

from alembic import op

import sqlalchemy as sa

# revision identifiers, used by Alembic.

revision = '1a510f2216c0'

down_revision = '003fcd9e8860'

def upgrade():

    ''' Add the column _block_users to the table projects.

    '''

    op.add_column(

        'projects',

        sa.Column('_block_users', sa.Text, nullable=True)

    )

def downgrade():

    ''' Drop the column _block_users from the table projects.

    '''

    op.drop_column('projects', '_block_users')