40c6aae14c3f_ck_started_before_ended.py 文件源码

def upgrade():
    op.create_check_constraint("ck_started_before_ended",
                               "resource",
                               "started_at <= ended_at")
    op.create_check_constraint("ck_started_before_ended",
                               "resource_history",
                               "started_at <= ended_at")