Leverage the Power of Two AngularJS Factories

Question

Leverage the Power of Two AngularJS Factories

Can I efficiently use two Factories in AngularJS by calling one from the other?

Here's the Scenario:

I have a Factory that returns an Array. This Factory is responsible for checking if the data to populate this Array already exists in local SQL Storage.

If it is TRUE, it sends this Data back to my Controller.

If it is FALSE, it should then invoke another Factory that fetches Data from a RESTful API. The retrieved Data is then stored in WebSQL DB and finally returned.

Is this Design based on standard Software-Patterns? I am struggling to implement AngularJS Techniques in my Project...

javascript angularjs factory

Answer 1

Answer №1

Injecting one service/factory/provider into another is perfectly acceptable.

To determine when to use each type, check out this informative answer - AngularJS: Service vs provider vs factory

In the specific scenario mentioned, it is suggested to have separate services for SQL and API functionality. The controller should only inject the SQL service and pass data to it. The SQL service decides how to handle the data; if necessary, it can retrieve additional information from the API service, which should return a promise initially and provide data upon resolution. Once the SQL service completes its operations, it sends the processed data back to the controller, regardless of whether it interacted with the API service or not. It is recommended to employ the promise pattern throughout this process. The controller does not need to be aware of the details regarding the API.

Answer 2

Injecting one service/factory/provider into another is perfectly acceptable.

To determine when to use each type, check out this informative answer - AngularJS: Service vs provider vs factory

In the specific scenario mentioned, it is suggested to have separate services for SQL and API functionality. The controller should only inject the SQL service and pass data to it. The SQL service decides how to handle the data; if necessary, it can retrieve additional information from the API service, which should return a promise initially and provide data upon resolution. Once the SQL service completes its operations, it sends the processed data back to the controller, regardless of whether it interacted with the API service or not. It is recommended to employ the promise pattern throughout this process. The controller does not need to be aware of the details regarding the API.

Answer 3

Answer №2

It is perfectly acceptable for two factories to exchange services with each other.

Answer 4

It is perfectly acceptable for two factories to exchange services with each other.

Answer 5

Answer №3

One of the great features of AngularJS is its built-in dependency injection mechanism, which allows for easy sharing of resources. For example, if you have two factories that need to use each other, here is a simple example of how to achieve this:

var app = angular.module('custom-factoryApp', ['ngRoute']);
app.factory("myFactory1", function() {
    return "Controller";
});

app.factory("myFactory2", function(myFactory1) {
    return "factory" + myFactory1;
});
function customController($scope, myFactory2) {
    $scope.ctrlName = myFactory2;
}

Now, let's take a look at the view:

<div ng-app="custom-factoryApp" class="container">
    <div ng-controller="customController" class="page-content">
        <div class="modal-dialog">
            <div class="modal-content">
                <div class="modal-header>
                    <h3 class="modal-title>AngularJS Custom Factory Example</h3>
                </div>
                <div class="modal-body>
                    {{ctrlName}}
                </div>
            </div>
        </div>
    </div>
</div>

Answer 6

One of the great features of AngularJS is its built-in dependency injection mechanism, which allows for easy sharing of resources. For example, if you have two factories that need to use each other, here is a simple example of how to achieve this:

var app = angular.module('custom-factoryApp', ['ngRoute']);
app.factory("myFactory1", function() {
    return "Controller";
});

app.factory("myFactory2", function(myFactory1) {
    return "factory" + myFactory1;
});
function customController($scope, myFactory2) {
    $scope.ctrlName = myFactory2;
}

Now, let's take a look at the view:

<div ng-app="custom-factoryApp" class="container">
    <div ng-controller="customController" class="page-content">
        <div class="modal-dialog">
            <div class="modal-content">
                <div class="modal-header>
                    <h3 class="modal-title>AngularJS Custom Factory Example</h3>
                </div>
                <div class="modal-body>
                    {{ctrlName}}
                </div>
            </div>
        </div>
    </div>
</div>

Leverage the Power of Two AngularJS Factories

Answer №1

Answer №2

Answer №3

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