Response/request object for .save() in backbone.js

Question

In the below function as you can see in the .save() part there is no response object, I would like to know how do i declare a response object to get a return value.

        $.when(
            _this.formWebsitePart.save({
                success: function () {
                    console.log("website saved")
                    _this.formWebsitePart.isSaved = true;
                }
            }),
            _this.formAddressPart.save({
                success: function () {
                    console.log("address saved")
                }
            })
        ).then(function () {
                _this.signupSuccess();
            }
        )

@Bergi Its just that i need to get a response from the .save function. — Rahul92, Feb 04 '15 at 13:17
The docs say that `.save()` returns a jqXHR object. Isn't that (being a promise instance) enough? — Bergi, Feb 04 '15 at 13:19
exactly, but in the above code doesn't seem to work, i think thats because .save() is not returning anything right? — Rahul92, Feb 04 '15 at 13:23
can you please tell me how to use that return in the .when promise object? — Rahul92, Feb 04 '15 at 13:29
the signupsuccess () gets executed , irrespective of what happens in the $.when() — Rahul92, Feb 04 '15 at 13:30
Are you sure that `.save()` did return promises? It seems that when failing validation it might return `false`, which `$.when` won't like. — Bergi, Feb 04 '15 at 13:40
can you tell me how actually you initiate a promise inside .save() — Rahul92, Feb 04 '15 at 13:49
No idea, the docs say it returns a jqXHR object which is an initiated promise. — Bergi, Feb 04 '15 at 13:54

score 0 · Answer 1 · edited May 23 '17 at 11:49

If your .save() genuinely returns a jqXHR object, then you probably want something like this :

_this.saveFormParts = function() {
    if(!_this.formWebsitePart.jqXHR) {
        _this.formWebsitePart.jqXHR = _this.formWebsitePart.save().then(function(response) {
            console.log("website saved");
            return response || null;
        });
    }
    if(!_this.formAddressPart.jqXHR) {
        _this.formAddressPart.jqXHR = _this.formAddressPart.save().then(function(response) {
            console.log("address saved");
            return response || null;
        });
    }
    return $.when(
        _this.formWebsitePart.jqXHR,
        _this.formAddressPart.jqXHR
    );
}

And, wherever appropriate :

_this.saveFormParts().then(_this.signupSuccess); // or similar

If your .save() doesn't return a jqXHR object, then you will need to do one of the following :

write a promisified version of .save() (preferred)
write a promisified version of .saveFormParts()

For promisification of a conventional callback interface - try this

Response/request object for .save() in backbone.js

1 Answers1