"""Add corpus_followers table

Revision ID: 4aa88f253dab
Revises: 5b2a6e590166
Create Date: 2023-01-12 14:47:39.492875

"""
from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision = '4aa88f253dab'
down_revision = '5b2a6e590166'
branch_labels = None
depends_on = None


def upgrade():
    op.create_table(
        'corpus_followers',
        sa.Column('user_id', sa.Integer(), nullable=False),
        sa.Column('corpus_id', sa.Integer(), nullable=False),
        sa.ForeignKeyConstraint(['corpus_id'], ['corpora.id'], ),
        sa.ForeignKeyConstraint(['user_id'], ['users.id'], ),
        sa.PrimaryKeyConstraint('user_id', 'corpus_id')
    )


def downgrade():
    op.drop_table('corpus_followers')