Question

如果我在API中成功更新某些内容，我正在尝试更改一些模型数据：

this.saveProject = function(project) {
  var editedProjectSupport = {
        /* some data */
  };
  SupportTimeTracks.update({id: project.backendId}, editedProjectSupport,
    function() {
      // There :
      project.department = controllerScope.edit.project.department;
      project.timetrack = controllerScope.edit.project.timetrack;
      growl.success('Project support successfully edited');
    },
    function(result) {
      growl.error('Project support couldn\'t be edited.');
      console.log(result);
    });
  this.edit.project = {};
  $scope.$broadcast('edit.project');
};

但我在成功回调project中无法访问function()。无论如何都要在参数或其他内容中传递它。

如何更新我的project.department＆amp; project.timetrack？

从视图中调用该函数，project在函数中是局部的（尽管它引用了作用域中的元素）

Answer 1

this.saveProject = function(project) {

  SupportTimeTracks.update({id: project.backendId}, editedProjectSupport,
    function() {
      // There : if you are not *shadowing* project variable, you MUST have access to project variable.
    }
  );
};

你的函数是一个闭包，project是this.saveProject中定义的变量，所以如果你没有在同一个名字里面定义另一个变量（阴影你的第一个变量）project必须定义，并且您已将值传递给this.saveProject，而可以访问它。

代码示例：

var closure = function(project){
  // I grab project var here
  setTimeout(function(){
    alert('there is no project shadowing: '+ project);
  }, 100);
};

closure('my project var');

var closureWithShadowing = function(project){
  // I grab project var here ... but
  setTimeout(function(){
    var project = 'I eat project variables'; // I have created a new var with the same name
             // so, I'm shadowing the original one.
    alert('project shadowing: '+ project);
  }, 500);
};

closureWithShadowing('my project var');

将参数传递给Ressource的方法回调

1 个答案:

代码示例：