1

下面的代码返回消息“错误：发送后无法设置标头。”

为什么？？我的英语不好 。所以让我用日语写。对不起。

にれ値２ ２种类のに変えてて，，値をををキーキーにににににににににににからからからから削除削除しようようとと以下ののコードをを书い书い书いたたが，上上が违っエラーページへ飞ばしてうまくうまくいっ×res.redirect（'back'）でで元の画面ににたいのですががが，，よいよいよいアドバイスがありありましましたらたらたらごご 

app.post('/thread/remove', function(req, res, next) {
var deletethread = req.param('deletethread'),
  deletepost = req.param("delete_post"),
  localpassword = req.param('localpassword'),
  category_id = req.param('category_id'),
  arraydeletethread = String(deletethread).split(","),
  arraydeletepost = String(deletepost).split(","),
  error_flag = false;

  console.log("arraydeletethread = " + arraydeletethread + ", arraydeletethread.length = " + arraydeletethread.length);
   if (deletethread) {
if(arraydeletethread.length > 0) {
  async.forEachSeries(arraydeletethread, function(val, callback) {
    if (val) {
      ThreadModel.findOne({post_id: Number(val)}, function(err, threadResult) {
        if(err) {
          console.log('error');
          return next(err);
        }
        if (threadResult.password !== localpassword) {
          error_flag = true;
          req.flash('errors', 'wrong password');
          req.flash('category_id', category_id);
          return res.redirect("/post/error");
        } else {
          threadResult.remove();
          console.log('remove suceeded!');
        }
      });
    }
  }, function() {
    console.log('thread remove finished!');
  });
}
  }

  console.log("arraydeletepost = " + arraydeletepost + ", arraydeletepost.length = " +   arraydeletepost.length);
  if (deletepost) {
if(arraydeletepost.length > 0){
  async.forEachSeries(arraydeletepost, function(val, callback) {
    if (val) {
      var arraydeletepost_i = String(val).split("_");
      ThreadModel.findOne({'replies.post_id': Number(arraydeletepost_i[1]), "post_id": Number(arraydeletepost_i[0])}, function(err, replyResult){
        if(err) {
          console.log('error');
          return next(err);
        }
        if (replyResult.password !== localpassword) {
          error_flag = true;
          req.flash('errors', 'wrong password');
          req.flash('category_id', category_id);
          return res.redirect("/post/error");
        } else {
          ThreadModel.update({post_id: Number(arraydeletepost_i[0])},{$pull: {replies: {post_id: Number(arraydeletepost_i[1])}}}, function(err){
            if(err) {
              console.log('error');
              return next(err);
            }
            console.log('remove suceeded!');
          });
        }
      });
    }
  }, function() {
    console.log('post remove finished!');
  });
}
  }
  return res.redirect('back');
});

我像这样更改了我的代码。和错误情况很顺利，但是从mongodb正常系统中删除后，该过程不再返回并且不会返回上一个屏幕。（谷歌翻译）エラーケースはうまくいきましたが、正常系はmongodbから削除できたあとに前の画面に戻らずが帰ってこなくた...たましし

app.post('/thread/remove', function(req, res, next) {
var deletethread = req.param('deletethread'),
  deletepost = req.param("delete_post"),
  localpassword = req.param('localpassword'),
  category_id = req.param('category_id'),
  arraydeletethread = String(deletethread).split(","),
  arraydeletepost = String(deletepost).split(",");

console.log("arraydeletethread = " + arraydeletethread + ", arraydeletethread.length = " + arraydeletethread.length);
console.log("arraydeletepost = " + arraydeletepost + ", arraydeletepost.length = " +   arraydeletepost.length);

async.parallel([
  function(callback) {
    if (deletethread) {
      if(arraydeletethread.length > 0) {
        async.forEachSeries(arraydeletethread, function(val, callback) {
          if (val) {
            ThreadModel.findOne({post_id: Number(val)}, function(err, threadResult) {
              if(err) {
                console.log('error');
                return callback("err = " + err);
              } else {
                if (threadResult.password !== localpassword) {
                  console.log('wrong password error');
                  return callback(new Error("wrong password error"));
                } else {
                  threadResult.remove();
                  console.log('remove suceeded!');
                  callback();
                }
              }
            });
          }
        }, function() {
          console.log('forEach thread finished');
        });
      }
    }
  },
  function(callback) {
    if (deletepost) {
      if(arraydeletepost.length > 0){
        async.forEachSeries(arraydeletepost, function(val, callback) {
          if (val) {
            var arraydeletepost_i = String(val).split("_");
            ThreadModel.findOne({'replies.post_id': Number(arraydeletepost_i[1]), "post_id": Number(arraydeletepost_i[0])}, function(err, replyResult){
              if(err) {
                console.log('error');
                return callback(err);
              } else {
                if (replyResult.password !== localpassword) {
                  console.log('wrong password error');
                  return callback(new Error("wrong password error"));
                } else {
                  ThreadModel.update({post_id: Number(arraydeletepost_i[0])},{$pull: {replies: {post_id: Number(arraydeletepost_i[1])}}}, function(err){
                    if(err) {
                      console.log('error');
                      return callback(err);
                    } else {
                      console.log('remove suceeded!');
                      callback();
                    }
                  });
                }
              }
            });
          }
        }, function() {
          console.log('forEach post finished');
        });
      }
    }
  }
],function(err) {
  if (err) {
    if (err.message === 'wrong password error') {
      req.flash('errors', 'パスワードが違います。');
      req.flash('category_id', category_id);
      return res.redirect("/post/error");
    } else {
      return next(err);
    }
  } else {
    res.redirect('back');
  }
});
});
4

1 回答 1

0

代码中存在结构性错误：

  1. async.forEachSeries(arraydeletethread在调用回调的迭代器函数中next- 它将被调用多次（因为迭代器对列表中的每个项目都执行），这是错误的。你只需要调用它一次。同样对于res.redirect
  2. arraydeletethread和数组的异步块arraydeletepost也应该被包裹async.waterfall或其他东西。然后nextorredirect应该在这个包装异步语句的最终回调中调用，而不是更早。

PS使用谷歌翻译，效果很好。

于 2013-11-01T15:57:59.853 回答