Loopback: Adding new field with default value, how to all documents in mongoDB is updated

Question

I am using Loopback 3 and mongoDB

I add new field with default value in json model

  {
    "name": "myModel",
    "options": {
        "mongodb": {
          "collection": "MyModel"
        }
    },
    "mixins": {
       "ShareApi": {
        "allow": ["findById"]
      }
    },
    "properties": {
      "name": {
        "type": "string",
        "description": "name"
      },
      "newField": {
        "type": "boolean",
        "default": false
      }
    }
  }

However, this just work for new documents. How to old documents are updated with newfield

You can do it with an aggregation pipeline update, $set and $ifNull. — D. SM, Jul 13 '20 at 02:57
@D.SM does Loopback support this migration? I want to achieve this from Loopback, not mongoDB — Vu Le Anh, Jul 13 '20 at 03:53
Does this answer your question? [MongoDB: update every document on one field](https://stackoverflow.com/questions/9038547/mongodb-update-every-document-on-one-field) — AlexZeDim, Jul 13 '20 at 13:31

Surbhi Rawat · Answer 1 · 2020-07-14T05:50:48.893

0

If you want to update all documents then use updateAll query of loopback:

myModel.updateAll({}, { newField: true }, function (err, affected) { })

edited Jul 14 '20 at 05:50

answered Jul 13 '20 at 13:26

Surbhi Rawat

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Loopback: Adding new field with default value, how to all documents in mongoDB is updated

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