Question

hei im try to get data with range between field_1 and field_2 but it always return null

here my code

  let limit = 10;
  let skip = 0;

  let conditions = {
            depth_1 : {"$gte" :parseInt(req.body.depth_1)},
            depth_2 : {"$lte" :parseInt(req.body.depth_2)}
 }
  let showImage = await Image.find(conditions).limit(limit).skip(skip).exec(function(err, docs){

        res.send(docs)

these code always returning null even i have that data in my db

my json data:

[
{
    "mode": "W",
    "_id": "5bd3e4890ec2f91a7d9309e9",
    "filename": "VH009_15.95-20.95_W.png.png",
    "path": "/home/harisman/dugong/H/bismillah/public/images/VH009_15.95-20.95_W.png.png",
    "hold_id": "VH009",
    "depth_1": 1595,
    "depth_2": 2095,
    "__v": 0,
    "createdAt": "2018-10-27T04:07:37.785Z",
    "updatedAt": "2018-10-27T04:07:37.785Z"
}
]

my req.body :

{
"depth_1" : 1595,
"depth_2" : 2095    
}

Answer 1

此行：

let showImage = await Image.find(conditions).limit(limit)
   .skip(skip).exec(function(err, docs) {})

您正在使用await和callback ...试试这个：

let showImage = await Image.find(conditions).limit(limit)
   .skip(skip).exec()

或者这也应该工作：

let showImage = Image.find(conditions).limit(limit)
   .skip(skip).exec().then(docs => console.log(docs))

两者都取决于exec实际上提供了完整的承诺

mongoose select with range always return null

1 个答案: