"""add gradient column in Flow

Revision ID: d3dbf656a499
Revises: e5a65ecff2cd
Create Date: 2024-09-27 09:35:19.424089

"""

from collections.abc import Sequence

import sqlalchemy as sa
import sqlmodel
from alembic import op

from langflow.utils import migration

# revision identifiers, used by Alembic.
revision: str = "d3dbf656a499"
down_revision: str | None = "e5a65ecff2cd"
branch_labels: str | Sequence[str] | None = None
depends_on: str | Sequence[str] | None = None


def upgrade() -> None:
    conn = op.get_bind()
    # ### commands auto generated by Alembic - please adjust! ###
    with op.batch_alter_table("flow", schema=None) as batch_op:
        if not migration.column_exists(table_name="flow", column_name="gradient", conn=conn):
            batch_op.add_column(sa.Column("gradient", sqlmodel.sql.sqltypes.AutoString(), nullable=True))

    # ### end Alembic commands ###


def downgrade() -> None:
    conn = op.get_bind()
    # ### commands auto generated by Alembic - please adjust! ###
    with op.batch_alter_table("flow", schema=None) as batch_op:
        if migration.column_exists(table_name="flow", column_name="gradient", conn=conn):
            batch_op.drop_column("gradient")

    # ### end Alembic commands ###
