javascript - 返回 Promise 时出错，出现错误，因为 .then 不是 Angular JS 中的函数

Question

我收到错误，因为 modifyProduct.then 不是函数，我读过一些文章，它说因为我没有返回任何 promise ，我如何可以实现这个，有人可以帮助我

在这里，我在 executionFromCompany 函数内调用 modifyProduct，然后在 Controller 内使用 executionFromCompany

 var app = angular.module('myApp', ["chart.js"]);
 app.factory('ProductsService', function($http) {
     function getProduct() {
         return $http.get('finalmsodetails.json').then(function(response) {
             //console.log(response.data);
             return response.data;
         });
     }

     function modifyProduct() {
         return getProduct().then(function(rawData) {
             newtest = rawData;
             //console.log('test', newtest.length);
             var lightData = rawData.map(function(item) {
                 // use Object.assign to prevent mutating original object
                 var newItem = Object.assign({}, item);
                 var lightExecutions = item.executions.map(function(d) {
                     var ld = {
                         id: d.id,
                         orderId: d.orderId,
                         executionStatus: d.executionStatus,
                         executedOn: d.executedOn,
                         executedBy: d.executedBy,
                         executedByDisplay: d.executedByDisplay,
                     };
                     return ld;
                 });
                 newItem.executions = lightExecutions;
                 return newItem;
             });
             return lightData;
         });
     }

     function executionFromCompany() {
         return modifyProduct.then(function(lightData) {
             executionByCompany = $filter('filter')(lightData.executions, function(inputs) {
                 if ((inputs.executedBy == 'a')) return inputs;
             });
             console.log(executionByCompany);
             return executionByCompany;
         });
     }
     return {
         getProduct: getProduct,
         modifyProduct: modifyProduct,
         executionFromCompany: executionFromCompany
     };
 });
 app.controller('MainCtrl', function($scope, ProductsService) {
     ProductsService.executionFromCompany().then(function(value) {
         console.log(value);
     }, function(err) {
         // Here will be if there was an error
     })
 });

Answer 1

modifyProduct 是一个函数，而不是一个对象

改变这个

modifyProduct.then

到此

modifyProduct().then