44 lines
1.2 KiB
Python
44 lines
1.2 KiB
Python
|
"""alter executions.schedule_id FK to ON DELETE SET NULL
|
|||
|
|
|
|||
|
|
Revision ID: 012_schedule_fk_set_null
|
|||
|
|
Revises: 011_add_agent_market_fields
|
|||
|
|
Create Date: 2026-05-07
|
|||
|
|
"""
|
|||
|
|
from alembic import op
|
|||
|
|
|
|||
|
|
revision = "012_schedule_fk_set_null"
|
|||
|
|
down_revision = "011_add_agent_market_fields"
|
|||
|
|
branch_labels = None
|
|||
|
|
depends_on = None
|
|||
|
|
|
|||
|
|
|
|||
|
|
def upgrade() -> None:
|
|||
|
|
"""将 executions.schedule_id 外键改为 SET NULL，删除定时任务时自动保留执行记录。"""
|
|||
|
|
try:
|
|||
|
|
op.drop_constraint("executions_ibfk_3", "executions", type_="foreignkey")
|
|||
|
|
except Exception:
|
|||
|
|
# FK name may vary; try alternate patterns
|
|||
|
|
try:
|
|||
|
|
op.drop_constraint("executions_ibfk_4", "executions", type_="foreignkey")
|
|||
|
|
except Exception:
|
|||
|
|
pass
|
|||
|
|
op.create_foreign_key(
|
|||
|
|
"executions_ibfk_3",
|
|||
|
|
"executions", "agent_schedules",
|
|||
|
|
["schedule_id"], ["id"],
|
|||
|
|
ondelete="SET NULL",
|
|||
|
|
)
|
|||
|
|
|
|||
|
|
|
|||
|
|
def downgrade() -> None:
|
|||
|
|
try:
|
|||
|
|
op.drop_constraint("executions_ibfk_3", "executions", type_="foreignkey")
|
|||
|
|
except Exception:
|
|||
|
|
pass
|
|||
|
|
op.create_foreign_key(
|
|||
|
|
"executions_ibfk_3",
|
|||
|
|
"executions", "agent_schedules",
|
|||
|
|
["schedule_id"], ["id"],
|
|||
|
|
ondelete="RESTRICT",
|
|||
|
|
)
|