Question

我有一个像这样的javascript数组： [[1,2,3], [4,5,6]]

1,2,3和4,5，以及6是我的追随者身份完成查找操作后。我想将输出发送到浏览器。

有人可以告诉我怎么出来或将结果发送到浏览器？

 for(var i = 0; i<idName.length; i++ ) {
  tempJson = {user_id: followerId, feed_content_text: finalFeedText };
  notifications.push(tempJson);
  var conditions = {
   user_id: followerId,
   external_id: key
  };
  FeedModel.findOne(conditions, function (err, data) {
    //What condition should i write to send the output to browser when, it is done for all 'idNames'
     res.send({
        success: true,
         message: finalMsgs
        });
  });
 }

Answer 1

你有没有尝试过类似的东西？

res.status(200).json({
        success: true,
         message: finalMsgs
        });

Answer 2

您是否尝试过以下操作：

var result = [];// initialize result array
for(var i = 0; i<idName.length; i++ ) {
  tempJson = {user_id: followerId, feed_content_text: finalFeedText };
  notifications.push(tempJson);
  var conditions = {
   user_id: followerId,
   external_id: key
  };
  FeedModel.findOne(conditions, function (err, data) {
    result.push(data);//storing data in result
    if((i+1) === idName.length) { // check if all is completed
     res.send({ // sending response
        success: true,
         message: finalMsgs,
         data: result
        });
   }
  });
 }

Answer 3

在我的情况下这很好用：

var userIndex = 0;
for(var i = 0; i<idName.length; i++ ) {
  userIndex++;
  tempJson = {user_id: followerId, feed_content_text: finalFeedText     
};
  notifications.push(tempJson);
  var conditions = {
   user_id: followerId,
   external_id: key
  };
  FeedModel.findOne(conditions, function (err, data) {
     userIndex--; // It'll be 0 at the end 

      if ( userIndex == 0 ) {
         return res.send({
                success: true,
                message: finalMsgs
                });
        }
  });
 }

退出node.js中的回调函数

3 个答案: