Angular chaining promises from foreach loop

Question

I have an array of photo files that needed to upload to Azure Cloud Storage, and i using foreach loop to call upload as below:

$scope.savetemplate = function ()          


        

Answer 1

You can do that with $q.all.

var promises = [];
for (var i in $scope.filesimage) {
    promises.push(upload($scope.filesimage[i]));
}
$q.all(promises).then(function() {
    $scope.data.Images = imagePathsArray ;

    $http.post({
          //after finish uploads i need to post the paths 
          //of all images to save into database
    });
});

function upload(file) {
    return Upload.upload({
       url: '/uploadImage',
       data: { file: file }
    }).then(function (resp) {
       imagePathsArray.push(resp.data);
    })
};

Answer 2

In the success callback of the upload function, after pushing the path:

imagePathsArray.push(resp.data);
if(imagePathsArray.length == $scope.filesimage.length){
  pushtoDatabase();
}

Inside pushtoDatabase call the $http({ .... });

NOTE : You might like to consider the probability of the upload getting failed. In that case you can work-around using a counter of failed files say failCounter , and then inside the if check for the condition

if ((imagePathsArray.length + failCounter) == $scope.filesimage.length){....}