AngularJs Http Status Code Generator工場

Question

AngularJs Http Status Code Generator工場

I am diving into the world of AngularJs and have developed a basic factory using $http get to fetch a .json file containing various HTTP status code numbers as keys, paired with their respective messages. However, I keep encountering the following error:

Cannot read property 'get' of undefined

JSON Data:

{
    "200": "Ok",
    "201": "Created",
    "202": "Accepted",
    "404": "Not_Found",
    "400": "Bad Request",
    "403": "Forbidden",
    "417": "Expectation Failed"
}

factory.js:

.factory('statusCodesFactory', function () {

var httpStatusCodes = {
getStatus: function ($http) {
$http.get('catalog/statusCodes.json')
.then(function (response) {
httpStatusCodes.code = response;
});
}
}
return httpStatusCodes;
})

javascript angularjs json

Answer 1

Answer №1

Ensure that you are passing the dependency for '$http' correctly.

.factory('statusCodesFactory', ['$http', function ($http) {
    var httpStatusCodes = {
        getStatus: function () {
            $http.get('catalog/statusCodes.json')
                .then(function (response) {
                    httpStatusCodes.code = response;
                });
            }
        }
        return httpStatusCodes;
    });

That being said, your function is not actually returning any value. A more appropriate structure would be:

.factory('statusCodesFactory', ['$http', function ($http) {
    var httpStatusCodes = {
        getStatus: function () {
            return $http.get('catalog/statusCodes.json')
                .then(function (response) {
                    return response;
                });
            }
        }
        return httpStatusCodes;
    });

To call this function:

var statusCodes = {};
statusCodesFactory.getStatus().then(function(response){
    statusCodes = response;
});

Answer 2

Ensure that you are passing the dependency for '$http' correctly.

.factory('statusCodesFactory', ['$http', function ($http) {
    var httpStatusCodes = {
        getStatus: function () {
            $http.get('catalog/statusCodes.json')
                .then(function (response) {
                    httpStatusCodes.code = response;
                });
            }
        }
        return httpStatusCodes;
    });

That being said, your function is not actually returning any value. A more appropriate structure would be:

.factory('statusCodesFactory', ['$http', function ($http) {
    var httpStatusCodes = {
        getStatus: function () {
            return $http.get('catalog/statusCodes.json')
                .then(function (response) {
                    return response;
                });
            }
        }
        return httpStatusCodes;
    });

To call this function:

var statusCodes = {};
statusCodesFactory.getStatus().then(function(response){
    statusCodes = response;
});

Answer 3

Answer №2

Include the $http service in your factory.

.factory('statusCodesFactory', ['$http', function ($http) {
    return {
        getStatus: function () {
           $http.get('catalog/statusCodes.json')
                .success(function (response) {
                    // 
                });
            }
        }
    };
}]);

Call the function like this -

statusCodesFactory.getStatus();

If you want to send the response back to the controller, use Promises. Add the $q service -

.factory('statusCodesFactory', ['$http', '$q', function ($http, $q) {
    return {
        getStatus: function () {
           var defer = $q.defer();
           $http.get('catalog/statusCodes.json')
                .success(function (response) {
                    defer.resolve(response);
                });
            }
           return defer.promise;
        }
    };
}]);

Then call the factory method from the controller like this -

statusCodesFactory.getStatus().then(function(response){
    // Use the response
});

Answer 4

Include the $http service in your factory.

.factory('statusCodesFactory', ['$http', function ($http) {
    return {
        getStatus: function () {
           $http.get('catalog/statusCodes.json')
                .success(function (response) {
                    // 
                });
            }
        }
    };
}]);

Call the function like this -

statusCodesFactory.getStatus();

If you want to send the response back to the controller, use Promises. Add the $q service -

.factory('statusCodesFactory', ['$http', '$q', function ($http, $q) {
    return {
        getStatus: function () {
           var defer = $q.defer();
           $http.get('catalog/statusCodes.json')
                .success(function (response) {
                    defer.resolve(response);
                });
            }
           return defer.promise;
        }
    };
}]);

Then call the factory method from the controller like this -

statusCodesFactory.getStatus().then(function(response){
    // Use the response
});

Answer 5

Answer №3

An issue has arisen indicating that calling the function get on $http is causing an error because $http is currently considered as undefined. The root cause of this problem lies in the $http parameter being passed to the getStatus: function($http)... function. It is essential to determine what is being passed into that function and why it is registering as an empty object.

Answer 6

An issue has arisen indicating that calling the function get on $http is causing an error because $http is currently considered as undefined. The root cause of this problem lies in the $http parameter being passed to the getStatus: function($http)... function. It is essential to determine what is being passed into that function and why it is registering as an empty object.

AngularJs Http Status Code Generator工場

Answer №1

Answer №2

Answer №3

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