"""make_start_date_optional

Revision ID: 04123319e94d
Revises: 1e747b52a328
Create Date: 2021-02-16 09:42:25.860748

"""
from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision = '04123319e94d'
down_revision = '1e747b52a328'
branch_labels = None
depends_on = None


def upgrade():
    op.alter_column('GRASProject', 'start_date', existing_type=sa.DATE(), nullable=True)


def downgrade():
    op.alter_column('GRASProject', 'start_date', existing_type=sa.DATE(), nullable=False)