"""add sequence to request revision

Revision ID: a903ebe91ad5
Revises: 04fe150da553
Create Date: 2018-08-30 13:45:35.561657

"""
from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects import postgresql

# revision identifiers, used by Alembic.
revision = 'a903ebe91ad5'
down_revision = '04fe150da553'
branch_labels = None
depends_on = None


def upgrade():
    # ### commands auto generated by Alembic - please adjust! ###
    db = op.get_bind()
    op.add_column('request_revisions', sa.Column('sequence', sa.BigInteger(), nullable=False))
    db.execute("CREATE SEQUENCE request_revisions_sequence_seq OWNED BY request_revisions.sequence;")
    # ### end Alembic commands ###


def downgrade():
    op.drop_column('request_revisions', 'sequence')