await db.collection('user_group')

.aggregate()

.match({

position: $.or(1, 2),

}).project({

_id: 0,

group_id: 1,

})

.end().then(res => {

manager_groups = res.list

})

昨天还运行好好的，今天中午就提示“$or”出错，什么原因？？？

{"errCode":-404011,"errMsg":"cloud.callFunction:fail requestID 8eb995da-c4a1-11e9-a538-525400dee61a, cloud function service error code -504002, error message errCode: -502001 database request fail | errMsg: [FailedOperation] (BadValue) unknown operator: $or; ; at cloud.callFunction api; ","requestID":"8eb995da-c4a1-11e9-a538-525400dee61a"}