CODEWITHSUNDEEP
node.jsmongodbmongoose
Mathew Kurian
Mathew Kurian

Reputation: 6039

mongoose - 'save' method does not exist

Consider a mongodb collection running on MongooseJS.

Sample Code:

Person.where('uid').equals(19524121).select('name').exec(function(err, data){
     // Here I can get the data correctly in an array.
     console.log(JSON.stringify(data)); 
     data[0].name = "try to save me now"; // Select the first item in the array
     data[0].save(); // Object #<Promise> has no method 'save'.
}

Error - Cant seem to figure out a way to fix this.

Object #<Promise> has no method 'save';

I am a little confused on why this is happening and I have researched quite a bit and can't seem to find a direct answer for this.

Upvotes: 3

Views: 4400

Answers (1)

Austin Mullins
Austin Mullins

Reputation: 7427

The result of a find is an array of records. You probably meant to loop over those records like this:

Person.find({ uid: /19524121/ }).select('name').exec(function(err, data){
  for(var i = 0; i < data.length; i++) {
     var myData = new Person(data[i]);
     myData.name = "try to save me now";
     myData.save(); // It works now!
  }
}

Also, from the mongoose homepage, it appears that the function callback prototype is function(err, data), not the other way around, which you corrected above.

Look at this from the homepage:

var fluffy = new Kitten({ name: 'fluffy' });

If data[0] currently has a regular JSON object, we need a line like this to convert to a BSON model object.

var myData = new Person(data[0]);

Upvotes: 12

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