"""crear tablas

Revision ID: e59d56a35fe9
Revises: 
Create Date: 2025-12-22 19:05:11.969285

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision: str = 'e59d56a35fe9'
down_revision: Union[str, Sequence[str], None] = None
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    """Upgrade schema."""
    # ### commands auto generated by Alembic - please adjust! ###
    op.add_column('projects', sa.Column('parent_id', sa.Integer(), nullable=True))
    op.create_foreign_key(None, 'projects', 'projects', ['parent_id'], ['id'])
    # ### end Alembic commands ###


def downgrade() -> None:
    """Downgrade schema."""
    # ### commands auto generated by Alembic - please adjust! ###
    op.drop_constraint(None, 'projects', type_='foreignkey')
    op.drop_column('projects', 'parent_id')
    # ### end Alembic commands ###