Question

我想从服务器（java）获取数组对象。下面是角度方法：

service.getAthors = function(){
        var deferred = $q.defer();

        var authors = authorResource.query(function() {
            console.log(authors);
        }).$promise.then( function(){
                deferred.resolve( "Adding book have gone correctly." );
            }, function(){
                deferred.reject("Error during adding new book.");
            });
    }

在控制台firebug中我看到：[{"author_id":7,"author":"Dan Brown"}]但是authors数组为空。你能告诉我为什么吗？

Answer 1

您需要将authors分配给返回的服务器数据。

authorResource.query(function() {
        console.log(authors);
    }).$promise.then( function(data){
            authors = data;
            deferred.resolve( "Adding book have gone correctly." );
        }, function(){
            deferred.reject("Error during adding new book.");
        });

Answer 2

{ 'get':    {method:'GET'},
  'save':   {method:'POST'},
  'query':  {method:'GET', isArray:true},
  'remove': {method:'DELETE'},
  'delete': {method:'DELETE'} };

authorResource.query({isArray:true},function() {
        console.log(authors);
    }).$promise.then( function(data){
            authors = data;
            deferred.resolve( "Adding book have gone correctly." );
        }, function(){
            deferred.reject("Error during adding new book.");
        });

您正在使用查询方法使用isArray：true

参见参考https://docs.angularjs.org/api/ngResource/service/ $ resource

Answer 3

当存在isArray：true的操作时，Angular $资源有一点不一致。

如果您调用资源类而不是实例，则以不同方式工作，例如：

myModule.controller('controller',function(MyResource){
  //In this MyResource is the class
  var myElement = MyResource.get({id:1});  //myElement is an instance

  var array = MyResource.query(); //When the query response the array gonna be filled

  var arrayFromMyElement = myElement.query() // Return a promise not a array and the data of the promise gonna get the array

  arrayFromMyElement.then(function(data){
    //Data is the array
  })
});

这可以在$ resource源代码中观察到：

https://github.com/angular/angular.js/blob/master/src/ngResource/resource.js#L627-L638

$ resource没有从json获取数组

3 个答案: