I am facing a challenge with handling asynchronous data calls in AngularJS.
The scenario is that I will receive multiple objects in an array from one API call, and then I need to enhance those objects with additional data from another API call.
My initial thought was to use nested async calls, but I'm struggling with how to properly implement this using the $q service. I have a service set up to return the extended objects from the second call, which I plan to use in a controller for displaying content in a view.
The first API call provides parameters required for the second API call to retrieve relevant data, which will then be returned to the controller.
To achieve this, I understand that I need to iterate through the results of the first call and make subsequent API requests within that loop. However, my main concern is how to handle returning this data back to the controller. Resolving the promise after the first loop iteration is not feasible due to the nature of asynchronous operations.
What would be the ideal solution for tackling this issue?
Edit: Here is my challenge translated into pseudo-JavaScript:
returnListOfStuff().then(function (data) {
var result = data.Result;
for (var i = 0; i < result.length; i++) {
var dataForListItem = null;
returnDataForListItem(result[i].ID).then(function (data) {
dataForListItem = data;
});
for (prop in dataForListItem[0]) {
result[i].prop = dataForListItem[0][prop];
}
}
return result;
});
It's evident that this approach won't work as expected since it only fetches results from the initial call returnListOfStuff(). The issue lies in the fact that the actions inside the for loop are not yet resolved. I'm unsure how to leverage $q.all() in this context, as I lack the necessary parameters from the returnListOfStuff function at that stage.