Save data into existing model instance in loopback

Question

I have a model called ModelA which uses base class Model, not PersistedModel. ModelA contains an existing Model instance which contains the following document.

{
    "_id" : ObjectId("5cf34da5265db517d8e366d3"),
    "userId" : ObjectId("5cf34da5265db517d8e366d0"),
    "providers" : [ 
        "123456789", 
        "1598763690", 
        "1407850217", 
        "1720082597"
    ],
    "countByType" : {
        "doctors" : 3,
        "laboratories" : 0,
        "hospitals" : 0,
        "imagingCenters" : 0,
        "other" : 2
    }
}

The problem I am facing right now is how to save the data into existing model instance.

 var modelInstance = new ModelA({userId: user.id, providers: ['111111111','222222222'], countByType: userProviderData.countByType});
           UserProvider.save({validate: false, throws: false },function(err, user) {
             if(err) {

               console.log('Errorsssssss ',err);
             } else {
               console.log(user);
             }
           });

Checked the below documentation, but this is creating new instance, instead of saving into existing Model.

https://apidocs.strongloop.com/loopback/v/1.5.1/#model-save-options-callback

Any help would be really appreciated.

The answer of @FaridNouriNeshat is correct. Also you didn't put _id field in your modelInstance. You just did userId — Ebrahim Pasbani
In line new ModelA({userId: user.id, providers: ['111111111','222222222'], countByType: userProviderData.countByType});, I don't see field id — Ebrahim Pasbani

Farid Nouri Neshat Farid Nouri Neshat · Accepted Answer · 2019-06-02T09:14:35

You should either use something like updateAll:

ModelA.updateAll({_id: yourId}, data);

Or by using setId and then save:

var modelInstance = new ModelA(data);
modelInstance.setId(yourId);
modelInstance.save();

The reason why in your example it didn't update the data was that there was no id passed to the model constructor, you should either pass that or use setId.

Save data into existing model instance in loopback

1 Answers