Converting Array of Arrays to Backbone Collection of Models

Question

new to Backbone and underscore js here.

I have an array of arrays that I want to convert to a collection of models.

So it's like

{ {1, 2, 3, 4}, {5, 6, 7, 8}}

The second level of arrays is what's going into a backbone model. Right now, I have

collection.reset(_.map(results, (indvidualResults) -> new model(individualResults))

Which doesn't work as when I do a console.log(collection.pop) I get a function printed out. I think this is because I'm working with an array of arrays (but I could be wrong). How do I convert the second array into a model and then put that into a collection?

(1) What does your data really look like? (2) Why are you doing the _.map when Collection#reset will do all that for you? (3) Collections have a pop method so of course console.log(collection.pop) gives you a function. — mu is too short
– mu is too short, Commented Jul 13, 2012 at 22:44
Do you mean console.log(collection.pop())? console.log(collection.pop)*should* give you a function. — Ricardo Tomasi
– Ricardo Tomasi, Commented Jul 14, 2012 at 23:20

jmconrad · Accepted Answer · 2012-07-14 01:30:48Z

9

Reshape your raw data to look more like:

[{ first: 1, second: 2, third: 3, fourth: 4 }, { first: 5, second: 6, third: 7, fourth: 8}]

Assuming you have a model and collection defined something like:

var Model = Backbone.Model.extend({});
var Collection = Backbone.Collection.extend({
    model: Model
});

Then just pass the array of attribute hashes into the reset method:

var results = [{ first: 1, second: 2, third: 3, fourth: 4 }, { first: 5, second: 6, third: 7, fourth: 8}];
var collection = new Collection();
collection.reset(results);
var model = collection.pop();
console.log(JSON.stringify(model.toJSON());

answered Jul 14, 2012 at 1:30

jmconrad

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1 Comment

Stanislav Ostapenko Over a year ago

collection.reset(results); works fine. But looks like it doesn't execute .parse() method on each model.

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