"""merged_to_arid

Revision ID: 486e4e6927bc
Revises: 6ecd63a78e7f
Create Date: 2018-07-04 11:49:36.136477

"""

# revision identifiers, used by Alembic.
revision = '486e4e6927bc'
down_revision = '6ecd63a78e7f'
branch_labels = None
depends_on = None

from alembic import op
import sqlalchemy as sa


def upgrade():
    ### commands auto generated by Alembic - please adjust! ###
    op.add_column('artists', sa.Column('merged_to_arid', sa.BigInteger(), nullable=True))
    op.create_foreign_key(None, 'artists', 'artists', ['merged_to_arid'], ['arid'])


def downgrade():
    op.drop_constraint(None, 'artists', type_='foreignkey')
    op.drop_column('artists', 'merged_to_arid')
    ### end Alembic commands ###