"""add_key_to_artist_moments

Revision ID: 46cae01b9a8b
Revises: 962eab0e994b
Create Date: 2021-01-21 10:42:22.179832

"""
from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision = '46cae01b9a8b'
down_revision = '962eab0e994b'
branch_labels = None
depends_on = None


def upgrade():
    op.add_column('ArtistMoment', sa.Column('external_key', sa.String(), nullable=True))
    op.create_unique_constraint('uq_ArtistMoment_external_key', 'ArtistMoment', ['external_key'])


def downgrade():
    op.drop_constraint('uq_ArtistMoment_external_key', 'ArtistMoment', type_='unique')

    op.drop_column('ArtistMoment', 'external_key')