Mongoose $pull 代码无限运行

Question

我的代码以 60 秒到 2 分钟的间隔一次又一次地运行。这个 put 函数需要能够从多个数组中动态拉取数据。我把它缩小到只发生在服务器端，客户端的功能永远不会触发，但服务器端将继续运行。有谁知道为什么会发生这种情况？我尝试了“update”、“findByIdAndUpdate”和“findById”，结果都一样。

router.put('/updateDeleteProducts', function(req, res, next){
    console.log("Here is the delete info: ", req.body);

    var size = req.body.size;
    var pictures = req.body.picture;
    var outerfabric = req.body.outerfabric;
    var innerfabric = req.body.innerfabric;
    var armlength = req.body.armlength;
    var backlength = req.body.backlength;

    var updates = {
        $pull: {updated:true}
    };

    if (req.body.size != undefined){
        updates.$pull.size = size;
    }
    if (req.body.picture != undefined){
        updates.$pull.pictures = pictures;
    }
    if (req.body.outerfabric != undefined){
        updates.$pull.outerfabric = outerfabric;
    }
    if (req.body.innerfabric != undefined){
        updates.$pull.innerfabric = innerfabric;
    }
    if (req.body.armlength != undefined){
        updates.$pull.armlength = armlength;
    }
    if (req.body.backlength != undefined){
        updates.$pull.backlength = backlength;
    }

    console.log("Here are the variables to be deleted: ", updates);
    Products.update({_id: req.body._id}, updates, function(err, data){
                if (err) next(err);
                console.log("DELETE Callback Data: ",data);
    });
});

Answer 1

因为你没有结束你的回复。由于您使用的是 express，因此您应该在 Products.update 回调中调用 res.send()（或在您的响应中调用 end 事件的其他方法）。试试这个：

Products.update({_id: req.body._id}, updates, function(err, data){
    if (err) next(err);
    console.log("DELETE Callback Data: ",data);
    res.send(data);
});