将参数传递给angularjs中的promise的回调

Question

我想弄清楚是否有任何方法可以将索引参数传递给promise的回调函数.例如.

serviceCall.$promise.then(function(object){
    $scope.object = object;
});

现在我想传入一个数组索引参数as

serviceCall.$promise.then(function(object,i){
    $scope.object[i] = something;
});

可以这样做吗？请告诉我.

这是下面的代码

StudyService.studies.get({id:    
$routeParams.studyIdentifier}).$promise.then(function(study) {
$scope.study = study;
for(var i=0;i<study.cases.length;i++){
  StudyService.executionsteps.get({id:   
  $routeParams.studyIdentifier,caseId:study.cases[i].id})
      .$promise.then(function(executionSteps,i){
      $scope.study.cases[i].executionSteps = executionSteps;
      });
  }
});

Answer 1

你可以使用一个闭包.

例如,在您的代码中,使用以下内容:

function callbackCreator(i) {
  return function(executionSteps) {
    $scope.study.cases[i].executionSteps = executionSteps;
  }
}
StudyService.studies.get({id: $routeParams.studyIdentifier})
  .$promise.then(function(study) {
    $scope.study = study;
    for(var i=0;i<study.cases.length;i++) {
      var callback = callbackCreator(i);
      StudyService.executionsteps.get({id: $routeParams.studyIdentifier,caseId:study.cases[i].id})
        .$promise.then(callback);
   }
});