The Angular route seems to be unresponsive to a single click, but it starts functioning properly when clicked

Question

The Angular route seems to be unresponsive to a single click, but it starts functioning properly when clicked

I am utilizing a data service to handle all my asynchronous data operations. Whenever I click the ERASE button, a function is triggered to erase all data and return an object indicating the operation status (Success: true/false).

If the value returned is TRUE, I want to redirect to another view (such as the Data Successfully Erased page). However, on the first click of the button, the routing does not occur even though the erase function returns the correct value (true). It only triggers the route on subsequent clicks.

Below is how I have implemented my removeDatabase() function from the dataService:


self.removeDatabase = function () {
    //$location.path("/setup");
    dataService.resetDatabase().done(function (msgs) {
        if(msgs['Operation_success']){
            console.log("Operation is Success ? :"+msgs['Operation_success']);
            $location.path("/setup");
            //self.loadSetup();
        }
    });
},

Here is the function inside the service:


appdata.resetDatabase = function () {
    appdata.msgs = {};
    var deferred = jQuery.Deferred();
    appdata.db = window.openDatabase("finbud_db", "1.0", "FinBud", 20);

    ... (omitted for brevity)

    return deferred.promise();
};

The relevant HTML code snippet:

<md-button ng-click="appCtrl.removeDatabase();">
    <i class="mdi mdi-reload"></i> Reset App 
</md-button>

Any assistance will be greatly appreciated. Thank you.

javascript angularjs asynchronous routes ngroute

Answer 1

Answer №1

To inform Angular that a change has occurred, make sure to execute $scope.$digest(). It is recommended to utilize Angular's built-in promise library, $q, rather than jQuery promises:

var deferral = $q.defer();
...
deferral.resolve();
...
return $q.all([deferral, d2, d3, d4]).then(function () {
    return appdata.messages;
});

Answer 2

To inform Angular that a change has occurred, make sure to execute $scope.$digest(). It is recommended to utilize Angular's built-in promise library, $q, rather than jQuery promises:

var deferral = $q.defer();
...
deferral.resolve();
...
return $q.all([deferral, d2, d3, d4]).then(function () {
    return appdata.messages;
});

Answer 3

Answer №2

karaxuna provided the accurate answer, and here is an extension to it.

If I follow the steps below, it will combine all 4 promises into one. The crucial data to be accessed is appdata.msgs located within each promise (within d.$$state).

var d1 = $q.defer();
...
d1.resolve();
...
return $q.all([d1, d2, d3, d4]).then(function () {
    return appdata.msgs;
});

By default, all functions return the deferred object. However, I aim to explicitly return the appdata.msgs. Hence, I require 4 functions that provide data instead of a deferred object.

To achieve this, I am resolving the promise with appdata.msgs (and returning the same at the end) in each of the four functions.

Now when all() function concludes after resolving all these functions (remember I resolved with appdata.msgs), it will return appdata.msgs.

The code snippet is as follows:

 function d1() {
   
   var d1 = $q.defer();
   
   ......
   //somewhere
   d1.resolve(msgs);
   .......
   
   return d1.promise;
}

...................

 function dN() {
   
   var dN = $q.defer();
   
   ......
   //somewhere
   dN.resolve(msgs);
   .......
   
   return dN.promise;
}

return $q.all([d1(), d2(),  ....., dN()]).then(
  
         function () {
  
            return msgs;
  
         },
               
         function(){
  
            msgs['Operation_success'] = false;
            return msgs;
  
         });

Please correct me if my interpretation is inaccurate. Thank you.

Answer 4

karaxuna provided the accurate answer, and here is an extension to it.

If I follow the steps below, it will combine all 4 promises into one. The crucial data to be accessed is appdata.msgs located within each promise (within d.$$state).

var d1 = $q.defer();
...
d1.resolve();
...
return $q.all([d1, d2, d3, d4]).then(function () {
    return appdata.msgs;
});

By default, all functions return the deferred object. However, I aim to explicitly return the appdata.msgs. Hence, I require 4 functions that provide data instead of a deferred object.

To achieve this, I am resolving the promise with appdata.msgs (and returning the same at the end) in each of the four functions.

Now when all() function concludes after resolving all these functions (remember I resolved with appdata.msgs), it will return appdata.msgs.

The code snippet is as follows:

 function d1() {
   
   var d1 = $q.defer();
   
   ......
   //somewhere
   d1.resolve(msgs);
   .......
   
   return d1.promise;
}

...................

 function dN() {
   
   var dN = $q.defer();
   
   ......
   //somewhere
   dN.resolve(msgs);
   .......
   
   return dN.promise;
}

return $q.all([d1(), d2(),  ....., dN()]).then(
  
         function () {
  
            return msgs;
  
         },
               
         function(){
  
            msgs['Operation_success'] = false;
            return msgs;
  
         });

Please correct me if my interpretation is inaccurate. Thank you.

The Angular route seems to be unresponsive to a single click, but it starts functioning properly when clicked

Answer №1

Answer №2

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