Amplifying an array in a mongoose document

Question

Amplifying an array in a mongoose document

I have a json array with objects and I am doing the following loop to update (insert or update) data in MongoDB using mongoose:

var currentMiniApp;
 function retResult(err) {
    if (err) {
        console.log(err);
    }
 }

 for (var i = 0 ; i < miniappData.miniapps.length; i++) {
    currentMiniApp = new MiniApp(miniappData.miniapps[i]);
    MiniApp.findOneAndUpdate(
        {id: currentMiniApp.id},
        currentMiniApp,
        {upsert: true},
        retResult);
 }

How can I do this in one command without using a loop?
I want the document to contain elements in a dataset
My data looks like this:

{
  "miniapps" : 
  [ 
  {
    "id":"app1",
    "icon" : "256fko6.png"
  }, 
  {
    "id":"app2",
    "icon" : "icon60x60.png"
  }
  ]
}

+3

node.js mongodb mongoose

Dor cohen May 05 '15 at 7:58

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1 answer

chridam · Answer 1 · 2015-05-05T08:28:49+0000

Using a statement in your upsert update , This update operation adds multiple values to an array if the values are not already present, in which case it does nothing to that array: $addToSet

$each

$addToSet

var miniAppids = [];
for (var i = 0 ; i < miniappData.miniapps.length; i++) {
    currentMiniApp = new MiniApp(miniappData.miniapps[i]);
    miniAppids.push(currentMiniApp.id);
};

MiniApp.update(
    { "id": { "$in": miniAppids } }, 
    { "$addToSet": { "miniapps": { "$each": miniappData.miniapps } } }, 
    { "upsert": true }, 
    retResult
)

Amplifying an array in a mongoose document

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