CODEWITHSUNDEEP
node.jsmongodbmongoosemongodb-query
midhun k
midhun k

Reputation: 1068

Insertion into array in mongo not happening?

I am new to MongoDb, and I have a question about the insertion of data. My mongoose schema for 'user' collection:

var user = new mongoose.Schema({

  username : {type: String},
  email    : {type: String,index: {unique: true}},
  password : {type: String},
  feed     : [{
                title       : {type: String},
                description : {type: String},
                latitude    : {type:Number},
                longitude   : {type:Number},
                feedImages  : [{
                                imageUrl: {type: String}
                              }]
             }]
});

I want to insert data to the feedimages and my service for that is:

app.post('/uploadFeedImage',function(req,res) {
    var _id         = req.body._id;
    var imageUrl    = req.body.imageUrl;
    db.user.update(
        {"feed._id":_id },
        {$push : {
            feedImages:{
                imageUrl:imageUrl
            }
        }
        },function (err,result) {
            if (err) {
                res.json({"success": '0', "message": "Error adding data"});
            }
            else {
                res.json({"success": '1', "message": "Data added"});
            }
        });
});

But the data is not inserted into table and no error is shown, I don't know what is the problem.

My user table is shown below:

TABLE

Upvotes: 1

Views: 48

Answers (1)

Ravi Shankar Bharti
Ravi Shankar Bharti

Reputation: 9268

use $ to push in the matched element of the array. i.e. for which feed._id matches

Try this:

db.user.update(
        {"feed._id":_id },
        {$push : {
            "feed.$.feedImages":{
                imageUrl:imageUrl
            }
        }
        },function (err,result) {
            if (err) {
                res.json({"success": '0', "message": "Error adding data"});
            }
            else {
                res.json({"success": '1', "message": "Data added"});
            }
        });

Edit

$ is update positional operator, which helps update only the element which matches the update criteria. For more info see MongoDB $ operator Documentation.

Upvotes: 2

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