How to get elements from object where in Backbone?

Question

I have object-model as:

var wo = new WordModel({
    "url": window.location.href,
    "time": toDay(),
    "w": w.trim()
});

timelineCollection.add(wo);

I try to get all element in timelineCollection where time is 04/02/2017. I tried this:

var o = {
    time: "04/02/2017"
};

var filtered = timelineCollection.where(o);
console.log(filtered);

But it does not work for me

This is unrelated to Backbone unless the code shown here is not the one in your app. Also, this is not valid JavaScript syntax. It looks like `obj` should be an array, is this correct? Are you looking for answer with Underscore? or plain JavaScript? — Emile Bergeron, Feb 03 '17 at 21:36
You should read about [mcve] and edit your question. Also, look for similar questions in [tag:underscore.js] as most are exactly about this. — Emile Bergeron, Feb 03 '17 at 21:38
Could help: [Get all models in backbone collection where attribute is NOT equal to some value](http://stackoverflow.com/questions/21608254/get-all-models-in-backbone-collection-where-attribute-is-not-equal-to-some-value) — Emile Bergeron, Feb 03 '17 at 21:48
Without a [mcve] of the problem, we won't be able to help you solve anything. — Emile Bergeron, Feb 03 '17 at 21:56

Emile Bergeron · Accepted Answer · 2017-02-03T22:03:10.197

1

Backbone's collection where function is really what you should use for this.

// short syntax, every object becomes a Backbone.Model by default.
var collection = new Backbone.Collection([{
    id: 0,
    time: "04/02/2017",
  }, {
    id: 1,
    time: "05/02/2017",
  },
  // you can mix both plain objects and Model instances
  new Backbone.Model({
    id: 2,
    time: "04/07/2017",
  }), new Backbone.Model({
    id: 3,
    time: "04/02/2017",
  })
]);

// passing an existing model works too.
var model = new Backbone.Model({
  id: 4,
  time: "04/02/2017",
});

collection.add(model);

console.log(collection.where({
  time: "04/02/2017"
}));

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.3.3/backbone-min.js"></script>

edited Feb 03 '17 at 22:03

answered Feb 03 '17 at 21:54

Emile Bergeron

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Seems problem is that I use model, and t first fill model after add to collection – Darama Feb 03 '17 at 21:59
@Darama nope, my answer only uses a shorter syntax. – Emile Bergeron Feb 03 '17 at 22:00
@Darama the problem is likely not shown in your question, possibly `toDay()` is not returning what you think or your `WordModel` is not a child class of `Backbone.Model`. – Emile Bergeron Feb 03 '17 at 22:05
I added `toDay()` function in question – Darama Feb 04 '17 at 07:30

How to get elements from object where in Backbone?

1 Answers1