图片是返回数据

//下面是我的query
let query = `db.collection("dishes").aggregate().lookup({
    from: "dish-cat",
    localField: "cat_id",
    foreignField: "_id",
    as: "cat",
  }).lookup({
    from: "unit",
    localField: "unit_id",
    foreignField: "_id",
    as: "unit",
  }).end()
`