"""add remark to license

Revision ID: 20251128_add_remark_to_license
Revises: abcd1236_add_image_path_to_product
Create Date: 2025-11-28 18:20:00.000000

"""
from alembic import op
import sqlalchemy as sa
from sqlalchemy import text

# revision identifiers, used by Alembic.
revision = '20251128_add_remark_to_license'
down_revision = 'abcd1236_add_image_path_to_product'
branch_labels = None
depends_on = None


def upgrade():
    # ### commands auto generated by Alembic - please adjust! ###
    # 检查字段是否已存在
    conn = op.get_bind()
    inspector = sa.inspect(conn)
    columns = [col['name'] for col in inspector.get_columns('license')]
    
    if 'remark' not in columns:
        with op.batch_alter_table('license', schema=None) as batch_op:
            batch_op.add_column(sa.Column('remark', sa.Text(), nullable=True))
    # ### end Alembic commands ###


def downgrade():
    # ### commands auto generated by Alembic - please adjust! ###
    # 检查字段是否存在
    conn = op.get_bind()
    inspector = sa.inspect(conn)
    columns = [col['name'] for col in inspector.get_columns('license')]
    
    if 'remark' in columns:
        with op.batch_alter_table('license', schema=None) as batch_op:
            batch_op.drop_column('remark')
    # ### end Alembic commands ###