"""add_fk_cascade_constraints

Revision ID: 8283acd4cbcc
Revises: a2b3c4d5e6f7
Create Date: 2026-03-29 13:55:46.488121

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision: str = '8283acd4cbcc'
down_revision: Union[str, Sequence[str], None] = 'a2b3c4d5e6f7'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
  """Upgrade schema."""
  op.drop_constraint(op.f('cards_user_id_fkey'), 'cards', type_='foreignkey')
  op.create_foreign_key(op.f('cards_user_id_fkey'), 'cards', 'users', ['user_id'], ['id'], ondelete='CASCADE')
  op.drop_constraint(op.f('deck_cards_card_id_fkey'), 'deck_cards', type_='foreignkey')
  op.drop_constraint(op.f('deck_cards_deck_id_fkey'), 'deck_cards', type_='foreignkey')
  op.create_foreign_key(op.f('deck_cards_deck_id_fkey'), 'deck_cards', 'decks', ['deck_id'], ['id'], ondelete='CASCADE')
  op.create_foreign_key(op.f('deck_cards_card_id_fkey'), 'deck_cards', 'cards', ['card_id'], ['id'], ondelete='CASCADE')
  op.drop_constraint(op.f('decks_user_id_fkey'), 'decks', type_='foreignkey')
  op.create_foreign_key(op.f('decks_user_id_fkey'), 'decks', 'users', ['user_id'], ['id'], ondelete='CASCADE')


def downgrade() -> None:
  """Downgrade schema."""
  op.drop_constraint(op.f('decks_user_id_fkey'), 'decks', type_='foreignkey')
  op.create_foreign_key(op.f('decks_user_id_fkey'), 'decks', 'users', ['user_id'], ['id'])
  op.drop_constraint(op.f('deck_cards_deck_id_fkey'), 'deck_cards', type_='foreignkey')
  op.drop_constraint(op.f('deck_cards_card_id_fkey'), 'deck_cards', type_='foreignkey')
  op.create_foreign_key(op.f('deck_cards_deck_id_fkey'), 'deck_cards', 'decks', ['deck_id'], ['id'])
  op.create_foreign_key(op.f('deck_cards_card_id_fkey'), 'deck_cards', 'cards', ['card_id'], ['id'])
  op.drop_constraint(op.f('cards_user_id_fkey'), 'cards', type_='foreignkey')
  op.create_foreign_key(op.f('cards_user_id_fkey'), 'cards', 'users', ['user_id'], ['id'])