在配置阶段如何使用工厂（角度）

Question

In my project I have a couple of provider s which I initialise during startup

angular.module('myApp', [])
    .config((barFooProvider, ....) => {
        barFooProvider.setAPIPath = '/a/b/c';
        ...
    });

As you can see I define an api-path here which is a string. But how can I set for example a factory ? Or is the only way to define the name of the service and later on use the $injector ?

Answer 1

You could use the $inject property annotation ( docs ) on the $get method of your provider:

myApp.provider('test', function() {

    this.setFactoryName = function(name) {
        this.$get.$inject = [name];
    };

    this.$get = function(factory) {
        return { 
            getMessageFromFactory: function() {
                return factory.msg;
            }
        };
    };

    // set default value
    this.setFactoryName('myFactory1');

});

then configure it this way:

myApp.config(function(testProvider){
    testProvider.setFactoryName('myFactory2');
});

This way the required factory will be injected to the $get method of your provider upon service instantiation.

Answer 2

You just can use Providers in Config Phase
In other words Providers are Configurable in AngularJs
May be this link would be helpfull

Answer 3

providers are the only services that can be used in config phase!

app.provider('test', function() {

  // set default path
  var APIPath = 'a/b/c';

  function setAPIPath(path) {
       APIPath =  path;
  }

});


angular.module('app', []).config(function(testProvider) {
  // set path during config
  testProvider.setAPIPath('x/v/b');
});