"""Add user_followers table

Revision ID: 7d51bc4b6079
Revises: 4aa88f253dab
Create Date: 2023-01-17 12:48:33.261942

"""
from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision = '7d51bc4b6079'
down_revision = '4aa88f253dab'
branch_labels = None
depends_on = None


def upgrade():
    op.create_table(
        'user_followers',
        sa.Column('follower_user_id', sa.Integer(), nullable=False),
        sa.Column('followed_user_id', sa.Integer(), nullable=False),
        sa.ForeignKeyConstraint(['followed_user_id'], ['users.id'], ),
        sa.ForeignKeyConstraint(['follower_user_id'], ['users.id'], ),
        sa.PrimaryKeyConstraint('follower_user_id', 'followed_user_id')
    )


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