无法设置在$ HTTP回调的一类变种 [英] Unable to set a class var in $http callback

问题描述

在下面的例子中，我试图设置在下面的服务定义的变量，在成功回调。我无法设置VAR authMap的服务。这里发生了什么？我该怎么办呢？

  app.service（授权，['$ HTTP'，函数（$ HTTP）{
  this.authMap = [];
  。$ http.get（'/ authmap'）成功（功能（数据）{this.authMap =数据}）;}]）;
 

解决方案

一个新的范围在您的匿名回调函数创建的，所以这个是不同的。结果
你可以这样做：

  app.service（授权，['$ HTTP'，函数（$ HTTP）{
  this.authMap = [];
  VAR认为这=;
  。$ http.get（'/ authmap'）成功（功能（数据）{that.authMap =数据}）;
}]）;
 

In the example below I am trying to set a variable defined in the below service, in the success callback. I am unable to set the var authMap in the service. What is happening here and how do I do it?

app.service("authorization", ['$http', function($http){
  this.authMap = [];
  $http.get('/authmap').success(function(data){this.authMap = data});

}]);

解决方案

A new scope is created in your anonymous callback function, so this is different.
You could do something like:

app.service("authorization", ['$http', function($http){
  this.authMap = [];
  var that = this;
  $http.get('/authmap').success(function(data){ that.authMap = data });
}]);

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