Extract from nested attribute

Question

I have the following model attributes:

[{
    "id": 1,
    "details": {
        "name": "Sun Tzu",
        "height": "180",
    },
    "lists": [
        [{
            "coworkers": "company cool",
            "friends": "School",
        }],
        [{
            "coworkers": "company nice",
            "friends": "Childhood",
        }]
    ]
}]

Yes, I know it is confusing but I am trying to understand nested models.

I want to display in a view (a table row), all the friends of id:1 model.
For example: School, Childhood.

How do I do that? Thanks in advance!

There are lots solutions to this out there - even on SO. Here's one: http://stackoverflow.com/questions/6535948/nested-models-in-backbone-js-how-to-approach — Brendan Delumpa, Mar 31 '14 at 22:17

Timothy Shields · Accepted Answer · 2014-04-01T03:04:29.577

3

var friends = _.chain(data)
    .findWhere({ id: 1 })
    .result('lists')
    .flatten(false)
    .pluck('friends')
    .value();

edited Apr 01 '14 at 03:04

answered Apr 01 '14 at 02:44

Timothy Shields

75,459
18
120
173

Should be `.pluck(0).pluck('friends')`, but +1 nonetheless – Bergi Apr 01 '14 at 11:23
@Bergi I got the impression that each of those arrays might have multiple friends in it, so pluck(0) might not be right. – Timothy Shields Apr 01 '14 at 13:37

score 1 · Answer 2 · answered Apr 01 '14 at 01:10

You can chain functions to get the output you are looking for

console.log(_.chain(data)
    .find(function(currentObject) {
        return currentObject.id === 1;
    })
    .pick("lists")
    .flatten(false)
    .pluck("friends")
    .value());

Output

[ 'School', 'Childhood' ]

Extract from nested attribute

2 Answers2