Question

我正在尝试删除数组中的每个项目（在本例中为产品记录）。但是，只删除一个项目。谁知道我做错了什么？提前谢谢！

app.post('/products/deletemulti', function (req, res, next) {
  // Async function: Find all categories
  var products = [1,2]; // Num products created
  console.log(products);
  // Update all products
  async.eachSeries(products, function (product, next) {
    console.log(product);
    if (ObjectId.isValid(product)) {
      Product.count({'_id': product}, function(error, count) {
        if (count != 0) {
          Product.remove({'_id': product}, function (error, product) {
            if (error) return next(error);
            else return next();
          });
        }
      });
    }
    else return next();
  });
  res.send("Delete products.");
});

Answer 1

async.eachSeries有三个参数。输入数组，迭代器函数和最终回调。你过早地调用res.send，可能导致迭代器不能执行。

我已经清理了一下这段代码并添加了对响应的检查。

app.post("/products/deletemulti", function(req, res, next) {
  // Async function: Find all categories
  var products = [1, 2]; // Num products created
  console.log(products);
  // Update all products

  async.eachSeries(
    products.filter(ObjectId.isValid),
    function(product, next) {
      Product.count({ _id: product }, function(error, count) {
        if (count != 0) {
          Product.remove({ _id: product }, next);
        }
      });
    },
    function(err) {
      if (err) {
        res.status(400).send("Did not delete products");
      } else {
        res.send("Delete products.");
      }
    }
  );
});

Async.eachSeries仅影响第一个数组项

1 个答案: