更新q在返回前推遲承諾

Question

我從工廠調用getBookID並通過使用從同一工廠調用getBookInfo的結果。但在Console.log（bookInfo）中，它顯示了以前調用的結果！ 如何在返回前更新deferred.promise值？

這是我的控制器

​​

，這是我廠

app = angular.module('myApp'); 

app.factory("MainFactory", ['$soap', '$http', '$q', function ($soap, $http, $q) { 
    var viewFactory = {}; 
    var deferred = $q.defer(); 
    viewFactory.getBookIDs = function() { 
     //var bookIDs = []; 
     $http({ 
      url: 'http://127.0.0.1/client.php?fn=getBooks', 
      method: "GET" 
     }).then(function success(response) { 
      deferred.resolve(response.data.result); 
     }, function myError(error) { 
      console.log('error', error); 
     }); 
     return deferred.promise; 
    }; 

    viewFactory.getBookList = function (bookIDs) { 
     $http({ 
      url: 'http://127.0.0.1/client.php?fn=getBooksInfo&p1=' + bookIDs, 
      method: "GET" 
     }).then(function success(response) { 
      deferred.resolve(response.data.result); 
     }, function myError(error) { 
      deferred.reject(error); 
     }); 
     return deferred.promise; 
    }; 

    return viewFactory; 
}]); 

Answer 1

你應該返回一個新的承諾，爲您的每個服務方法：

app.factory("MainFactory", ['$soap', '$http', '$q', function ($soap, $http, $q) { 
    var viewFactory = {}; 
    viewFactory.getBookIDs = function() { 
     var deferred = $q.defer(); 
     //var bookIDs = []; 
     $http({ 
      url: 'http://127.0.0.1/client.php?fn=getBooks', 
      method: "GET" 
     }).then(function success(response) { 
      deferred.resolve(response.data.result); 
     }, function myError(error) { 
      console.log('error', error); 
     }); 
     return deferred.promise; 
    }; 

    viewFactory.getBookList = function (bookIDs) { 
     var deferred = $q.defer(); 
     $http({ 
      url: 'http://127.0.0.1/client.php?fn=getBooksInfo&p1=' + bookIDs, 
      method: "GET" 
     }).then(function success(response) { 
      deferred.resolve(response.data.result); 
     }, function myError(error) { 
      deferred.reject(error); 
     }); 
     return deferred.promise; 
    }; 

    return viewFactory; 
}]); 

承諾不應該被重複使用（除非您要執行任務的倍數觸發同樣的決心/拒絕......不過，你應該明確地實現一個promise集合器，我認爲）。

Answer 2

所有角度的服務是單身，所以我想你得到這個錯誤是getBookIDs和getBookList份額的原因相同deferred

嘗試將您的工廠更改爲

app.factory("MainFactory", ['$soap', '$http', '$q', function ($soap, $http, $q) { 
    var viewFactory = {}; 
    viewFactory.getBookIDs = function() { 
     //var bookIDs = []; 
     var deferred = $q.defer(); 
     $http({ 
      url: 'http://127.0.0.1/client.php?fn=getBooks', 
      method: "GET" 
     }).then(function success(response) { 
      deferred.resolve(response.data.result); 
     }, function myError(error) { 
      console.log('error', error); 
     }); 
     return deferred.promise; 
    }; 

    viewFactory.getBookList = function (bookIDs) { 
     var deferred = $q.defer(); 
     $http({ 
      url: 'http://127.0.0.1/client.php?fn=getBooksInfo&p1=' + bookIDs, 
      method: "GET" 
     }).then(function success(response) { 
      deferred.resolve(response.data.result); 
     }, function myError(error) { 
      deferred.reject(error); 
     }); 
     return deferred.promise; 
    }; 

    return viewFactory; 
}]);