"""Add support for allow_rebase

Revision ID: d7589827abbb

Revises: 802047d28f89

Create Date: 2019-05-09 16:25:58.971712

"""

from alembic import op

import sqlalchemy as sa

# revision identifiers, used by Alembic.

revision = 'd7589827abbb'

down_revision = '802047d28f89'

def upgrade():

    ''' Add the column allow_rebase to the table pull_requests.

    '''

    op.add_column(

        'pull_requests',

        sa.Column('allow_rebase', sa.Boolean, default=False, nullable=True)

    )

    op.execute('''UPDATE pull_requests SET allow_rebase=False;''')

    op.alter_column(

        'pull_requests', 'allow_rebase', existing_type=sa.Boolean,

        nullable=False, existing_nullable=True)

def downgrade():

    ''' Remove the column allow_rebase from the table pull_requests.

    '''

    op.drop_column('pull_requests', 'allow_rebase')