Angularsjs找不到服务功能

Question

我的filterProducts函数调用了findIntersection，但是我得到一个错误findIntersection未定义。

angular.module('BrandService', []) 
.service('BrandService', function ($filter, DataService) { 
    var productDb; 
    var products; 

    return { 
     filterProducts(brands, priceRange) { 
      var filteredProducts = []; 
      var brandProducts = []; 
      var priceProducts = []; 
      var productsArray = []; 

      var brandChecked = false; 
      var priceChecked = false; 

      angular.forEach(brands, function (brand) { 
       if (brand.checked) { 
        brandChecked = true; 

        angular.extend(brandProducts, 
         $filter('filter')(productDb, { 'brand': brand.name })); 
       } 

       if (brandChecked) { 
        productsArray.push(brandProducts); 
        console.log('brandProducts = ', brandProducts) 
       } 
      }); 

      angular.forEach(priceRange, function (price) { 
       if (price.checked) { 
        priceChecked = true; 

        let filteredProductDb = productDb.filter((prod) => { 
         return (prod.price >= price.low && prod.price <= price.high); 
        }); 
        angular.extend(priceProducts, filteredProductDb);  
       } 
      }); 

      if (priceChecked) { 
       productsArray.push(priceProducts); 
       // console.log('priceProducts = ', priceProducts) 
      } 

      if (!brandChecked && !priceChecked) { 
       filteredProducts = products; 
      } else { 
       if (productsArray.length > 1) { 
        filteredProducts = findIntersection(productsArray); 
       } else { 
        filteredProducts = productsArray[0]; 
       } 
      } 

      return filteredProducts; 
     }, 

     findIntersection(productsArray) { 
      console.log('findIntersection called') 
      var filteredProducts = []; 
      var filteredSet = new Set(); 

      for(var i=0; i < productsArray.length - 1; i++) { 
       var products1 = productsArray[i]; 
       var products2 = productsArray[i+1]; 

       angular.forEach(products1, function(product1) { 
        angular.forEach(products2, function(product2) { 
         if(product1._id == product2._id) { 
          filteredSet.add(product1); 
         } 
        }); 
       }); 
      } 

      filteredProducts = Array.from(filteredSet); 
      return filteredProducts; 
     }    
    }   
}) 

我的filterProducts函数调用findIntersection，但是我得到一个错误findIntersection是未定义的。

我的filterProducts函数调用了findIntersection，但是我得到一个错误findIntersection未定义。

Answer 1

您正在返回一个带有属性的JavaScript对象。你没有定义全局函数。

您需要存储服务返回前：

var service = { findProducts: ... , findIntersection: ... }; 
return service; 

而不是调用findIntersection而且，打电话service.findIntersection。

Answer 2

您必须对本地对象进行引用。

简单地改变这样的：filteredProducts = findIntersection(productsArray);

这样：filteredProducts = this.findIntersection(productsArray);