Attempting to create a factory and implement it in one of my controllers, I encountered an issue:
Issue: TypeError: wordsToTrain is not a function
Despite the simplicity of my controller and factory, I am still puzzled by the reason for this error:
angular.module('appleApp')
.controller('PracticeCtrl', [ '$scope', 'wordsToTrain', function ($scope, wordsToTrain) {
wordsToTrain();
}]);
angular.module('appleApp')
.factory('wordsToTrain', function () {
return 3;
});
When attempting to create a new value, ensure that your factory is returning a function rather than just a value.
angular.module('bananaApp')
.controller('TrainingCtrl', [ '$scope', 'wordsToTrain', function ($scope, wordsToTrain) {
console.log(wordsToTrain) // This will return 3, not a function;
}]);
angular.module('bananaApp')
.factory('wordsToTrain', function () {
return 3;
});
// To return a function
angular.module('bananaApp')
.controller('TrainingCtrl', [ '$scope', 'wordsToTrain', function ($scope, wordsToTrain) {
console.log(wordsToTrain()) // This will also return 3, but as a function;
}]);
angular.module('bananaApp')
.factory('wordsToTrain', function () {
return function() {
return 3;
});
Consider implementing your service in the following way:
angular.module('appleApp')
.factory('phrasesToStudy', function () {
var phrasesToStudy = {};
phrasesToStudy.getValue = function() {
return 5;
}
return phrasesToStudy;
});
Then, you can utilize it like this:
var result=phrasesToStudy.getValue();
The Factor function will provide you with an object that allows you to add a method to it.
It is important to note the use of [] in the angular.module function.
When the [] parameter is included in the module definition, it specifies the dependent modules. If the [] parameter is omitted, you are not creating a new module but rather retrieving an existing one.
angular.module('bananaApp',[])
.controller('TrainingCtrl', [ '$scope', 'wordsToTrain',
function ($scope, wordsToTrain) {
console.log(wordsToTrain.three());
}]);
angular.module('bananaApp').factory('wordsToTrain', function () {
var _factory ={};
_factory.three = function(){
return 3;
}
return _factory;
});
Check out the demo for more information.
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