"""artist last multiple genres

Revision ID: f833c9863d4d
Revises: 169696bba4ab
Create Date: 2019-06-25 15:28:54.984313

"""
from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision = 'f833c9863d4d'
down_revision = '169696bba4ab'
branch_labels = None
depends_on = None


def upgrade():
    # ### commands auto generated by Alembic - please adjust! ###
    op.create_table('ArtistLastGenre',
    sa.Column('artist_id', sa.BigInteger(), nullable=False),
    sa.Column('genre_id', sa.Integer(), nullable=False),
    sa.ForeignKeyConstraint(['artist_id'], ['Artist.id'], name=op.f('fk_ArtistLastGenre_artist_id_Artist'), ondelete='CASCADE'),
    sa.ForeignKeyConstraint(['genre_id'], ['Genre.id'], name=op.f('fk_ArtistLastGenre_genre_id_Genre')),
    sa.PrimaryKeyConstraint('artist_id', 'genre_id', name=op.f('pk_ArtistLastGenre'))
    )
    op.drop_constraint('fk_Artist_last_genre_id_Genre', 'Artist', type_='foreignkey')
    op.drop_column('Artist', 'last_genre_id')
    # ### end Alembic commands ###


def downgrade():
    # ### commands auto generated by Alembic - please adjust! ###
    op.add_column('Artist', sa.Column('last_genre_id', sa.INTEGER(), autoincrement=False, nullable=True))
    op.create_foreign_key('fk_Artist_last_genre_id_Genre', 'Artist', 'Genre', ['last_genre_id'], ['id'])
    op.drop_table('ArtistLastGenre')
    # ### end Alembic commands ###