"""course term dates

Revision ID: 487d155678ea
Revises: 1ec230be46bd
Create Date: 2026-07-31 16:50:52.938563

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision: str = '487d155678ea'
down_revision: Union[str, None] = '1ec230be46bd'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    # ### commands auto generated by Alembic - please adjust! ###
    op.add_column('courses', sa.Column('start_date', sa.Date(), nullable=True))
    op.add_column('courses', sa.Column('end_date', sa.Date(), nullable=True))
    # ### end Alembic commands ###


def downgrade() -> None:
    # ### commands auto generated by Alembic - please adjust! ###
    op.drop_column('courses', 'end_date')
    op.drop_column('courses', 'start_date')
    # ### end Alembic commands ###