Question

在下面提供以下对象片段：

var s;
var tab = [];
var myarray= [];
for(var i=0;i<=tab.length-1;i++){
              s= "{\"id\":\"" + tab[i][0] + "\",\"ts\":\"" + tab[i][1] + "\",\"lat\":\"" + tab[i][2] + "\",\"lon\":\""+tab[i][3]+"\"}";
                myarray.push(s);
            }

myarray = [ '{"id":"id1","ts":"ts1","lat":"lat1","lon":"lon1"}',
  '{"id":"id2","ts":"ts2","lat":"lat2","lon":"lon2"}',
  '{"id":"id3","ts":"ts3","lat":"lat3","lon":"lon3"}' ]

我想使用mongoose将它保存在mongo数据库中，这是我的代码：

for(var obj in myarray){
       var doc = new MyCollection(myarray[obj])
        doc.save()
                  .catch((err=>{console.log(error.message);}))
            }

但是我在执行代码时遇到了这个错误：

TypeError: Cannot use 'in' operator to search for '_id' in {"id":"id1","ts":"ts1","lat":"lat1","lon":"lon1"}

我找不到错误的来源。你能帮帮我吗？

Answer 1

在myarray中，您使用单引号括起了对象。删除并尝试。你的myarray应该是这样的。

myarray: [ {"id":"id1","ts":"ts1","lat":"lat1","lon":"lon1"}',
  '{"id":"id2","ts":"ts2","lat":"lat2","lon":"lon2"}',
  '{"id":"id3","ts":"ts3","lat":"lat3","lon":"lon3"} ];

for(var obj in myarray){
       var doc = new MyCollection(myarray[obj])
        sigfoxData.save()
                  .catch((err=>{console.log(error.message);}))
            }

Answer 2

希望这有帮助

 var myarray = [ {"id":"id1","ts":"ts1","lat":"lat1","lon":"lon1"}',
        '{"id":"id2","ts":"ts2","lat":"lat2","lon":"lon2"}',
        '{"id":"id3","ts":"ts3","lat":"lat3","lon":"lon3"} ];

    Model.create(myarray, function (err) {
        if (err) {
            response.send({error: true, message: err});
        } else {
            response.send({success: true});
        }
    });

Answer 3

我通过这样做得到了解决方案：

for(var i=0;i<=tab.length-1;i++){
              s= "{\"id\":\"" + tab[i][0] + "\",\"ts\":\"" + tab[i][1] + "\",\"lat\":\"" + tab[i][2] + "\",\"lon\":\""+tab[i][3]+"\"}";
                myarray.push(JSON.parse(s));
            }

所以我只是解析了s字符串！

如何使用mongoose在mongo db中保存对象数组

3 个答案: