Combine several JSON files into a single file

Question

Combine several JSON files into a single file

After spending countless hours searching on Google, I finally gathered the courage to ask my question here.

I have several json files.

localhost/feed01.json
localhost/feed02.json
localhost/feed03.json

All of the json file structures are similar to this example, but contain random data such as random, id, date type, etc...

[
        {
            "id":1,
            "date": "12/12/2011",
            "type": "Run",
            "distance": "3 miles",
            "comments": "This was really hard",
            "minutes": 36
        },
        {
            "id":2,
            "date": "12/11/2011",
            "type": "Bike",
            "distance": "6 miles",
            "comments": "All down hill...felt like nothing",
            "minutes": 30
        },
        {
            "id":3,
            "date": "12/10/2011",
            "type": "Walk",
            "distance": "2.5 miles",
            "comments": "Shouldn't have taken the dog",
            "minutes": 45
        }
]

Now, I am looking to combine all these JSON files into one and sort them by date by default (upon initialization). What is the most effective method to merge and sort using backbone.js utilizing collections?

javascript json backbone.js

Answer 1

Answer №1

Backbone offers the flexibility to customize backbone.sync using options

By providing a target URL as an option to collection.fetch, you can override the default URL
Setting add: true will add models to the collection without resetting it

This allows you to create a collection like this:

var c = new Backbone.Collection();
c.fetch({
    url: ('localhost/feed01.json'),
    add: true
});
c.fetch({
    url: ('localhost/feed02.json'),
    add: true
});
...

To execute a callback once all fetch operations are complete, you can utilize a jQuery deferred object

var files = ['localhost/feed01.json', 'localhost/feed02.json', 'localhost/feed03.json'];
var c=new Backbone.Collection();
var dfds = [], dfd, i, l;
for (i=0, l=files.length; i<l;i++) {
    dfd = c.fetch({
        url: (files[i]),
        add: true
    });
    dfds.push(dfd);
}

$.when.apply(null, dfds).done(function() {
    console.log(c.pluck('id'));
});

Answer 2

Backbone offers the flexibility to customize backbone.sync using options

By providing a target URL as an option to collection.fetch, you can override the default URL
Setting add: true will add models to the collection without resetting it

This allows you to create a collection like this:

var c = new Backbone.Collection();
c.fetch({
    url: ('localhost/feed01.json'),
    add: true
});
c.fetch({
    url: ('localhost/feed02.json'),
    add: true
});
...

To execute a callback once all fetch operations are complete, you can utilize a jQuery deferred object

var files = ['localhost/feed01.json', 'localhost/feed02.json', 'localhost/feed03.json'];
var c=new Backbone.Collection();
var dfds = [], dfd, i, l;
for (i=0, l=files.length; i<l;i++) {
    dfd = c.fetch({
        url: (files[i]),
        add: true
    });
    dfds.push(dfd);
}

$.when.apply(null, dfds).done(function() {
    console.log(c.pluck('id'));
});

Answer 3

Answer №2

To combine data, simply create a collection and populate it with arrays containing JSON objects or model representations. To make this process possible, you can customize the fetch method by making three separate ajax calls, utilizing jQuery deferreds to ensure all data is gathered and added to the collection before resolving the fetch request.

To modify the sorting logic, you must override the collections' comparator method to sort according to your specific criteria.

For instance, you could specify it like this:

comparator: function(model) {
    return +new Date(model.get('date'));
}

This will sort the data based on the date field.

If you happen to define the comparator after adding models to the collection, remember to call the sort method to ensure that the models are sorted correctly as per the defined rules of the comparator.

Answer 4

To combine data, simply create a collection and populate it with arrays containing JSON objects or model representations. To make this process possible, you can customize the fetch method by making three separate ajax calls, utilizing jQuery deferreds to ensure all data is gathered and added to the collection before resolving the fetch request.

To modify the sorting logic, you must override the collections' comparator method to sort according to your specific criteria.

For instance, you could specify it like this:

comparator: function(model) {
    return +new Date(model.get('date'));
}

This will sort the data based on the date field.

If you happen to define the comparator after adding models to the collection, remember to call the sort method to ensure that the models are sorted correctly as per the defined rules of the comparator.

Combine several JSON files into a single file

Answer №1

Answer №2

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