CODEWITHSUNDEEP
angularjspromise
SD Dev
SD Dev

Reputation: 345

Does Angular1.4 $http include a promise already in the http get? Or do I make my own

I'm a bit confused, the more I read resources online about $q and $http the more my head spins. So if I do a $http.get call does that not include a promise? Or do I bring $q in?

Upvotes: 2

Views: 76

Answers (4)

Alejandro
Alejandro

Reputation: 270

$http.get call does that not include a promise? The Answer is Yes, you can return a promise or resolve the promise with $http

Returning a promise from $http.get

getData: function() {
    return $http.get('some url'); // you can resolve this promise later
                                  // using (then)
}

So later in your code you can resolve the above promise like this

...

myService.getData().then(function(response) {
    // do something with response
}).catch()

Resolve the promise inline

getData: function() {
    $http.get('some url').then(function(response) {
        // do something with response
     }).catch()
}

Upvotes: 0

daan.desmedt
daan.desmedt

Reputation: 3820

The $http API is based on the deferred/promise APIs exposed by the $q service. While for simple usage patterns this doesn't matter much, for advanced usage it is important to familiarize yourself with these APIs and the guarantees they provide.

https://docs.angularjs.org/api/ng/service/$http

Meaning that the $http.get will return a promise anyway. No need nesting your own $q approach. Just return the $http invoke.

Upvotes: 0

Pankaj Kumar
Pankaj Kumar

Reputation: 881

You can refer to the following link

https://www.peterbe.com/plog/promises-with-$http

This service ($http.get()) will return promise as success callback and error callback...so this function itself returns promise. You just have to handle it

Upvotes: 0

andrunix
andrunix

Reputation: 1754

It is built on $q and returns a promise. See the docs: https://docs.angularjs.org/api/ng/service/$http

And the example there:

$http({
  method: 'GET',
  url: '/someUrl'
}).then(function successCallback(response) {
    // this callback will be called asynchronously
    // when the response is available
    }, function errorCallback(response) {
    // called asynchronously if an error occurs
    // or server returns response with an error status.
});

$http.get is just a convenience method on the above.

Upvotes: 1

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