AngularJS $http.post() response function not executing in the correct sequence

When calling a function from my angular controller to make a $http.post() request, the code below the function call is executing before the successFunction(), preventing the code inside the if block from running. How can I ensure the if block executes without moving it to the successFunction()?

$scope.formSuccess = false;

$scope.submit = function(serviceName) {
   submitRequest(serviceName);
   if($scope.formSuccess) {
      // do something 
    }
};

var submitRequest = function(serviceName) {
   $http.post(serviceName, data, { headers: { 'Content-type':   'application/json' }  
  }).then(successFunction, errorFunction);
};

var successFunction = function(response) {
  $scope.formSuccess =true;
};

Answer №1

The issue arises from the fact that the line if($scope.formSuccess) { is being executed before the completion of the http request, resulting in the statement inside the if never getting executed.

A more elegant solution would be to implement functions to handle the success and failure scenarios of the $http.post method.

$scope.formSuccess = false;

$scope.submit = function(serviceName) {
   submitRequest(serviceName)
    .then(onPostSuccess)
    .catch(onPostFail);
};

var submitRequest = function(serviceName) {
   return $http.post(serviceName, data, { headers: { 'Content-type':   'application/json' }  
   });
};

var onPostSuccess = function(response) {
  $scope.formSuccess = true;
  //perform actions upon successful form submission
  
};

var onPostFail = function(response){
  $scope.formSuccess = false;
  //display form submission failed message
}

Answer №2

Within the submit function, the if statement ($scope.formSuccess) does not wait for the http response to return. Consequently, it always evaluates to false. To address this issue, you should place it inside a promise function.

var successHandler = function(response) {
  $scope.formSuccess = true;
  // Add your logic here

};

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