Question

我的集合中有数组对象。当我尝试将数据更新到数组对象时，我得到额外的方括号。这是代码。

    var comments = [{
        'COMMENTED_BY' : employee.SYSTEM_USER_ID,
        'COMMENT' : employee.FIRST_NAME+" "+employee.LAST_NAME+" Started working on this comlaint"
     }];

    if(req.body.complaint.comment){
       comments.push({'COMMENTED_BY' : employee.SYSTEM_USER_ID,'COMMENT': req.body.complaint.comment});
    }   
          Complaint.findByIdAndUpdate(
              req.body.complaint.complaintId,
              {$set: {'STATUS': 1}, $push: {"COMMENTS": comments}},
              {safe: true, upsert: true},
                function(err, model) {

我的收藏如下所示

        {
            "COMMENT" : "media delete confirmation UI issue",
            "COMMENTED_BY" : ObjectId("575cc0b39dd420a41d202dad"),
            "_id" : ObjectId("575fe9e1a5ee92201b58011e"),
            "CREATED_AT" : ISODate("2016-06-14T11:26:25.003Z")
        }, 
        {
            "COMMENT" : "Could someone explain to me how Luke Ronchi gets in when Tom Latham is a very capable keeper as well as batsman? Why not another specialist batsman/bowler?",
            "COMMENTED_BY" : ObjectId("575cc0b39dd420a41d202dad"),
            "_id" : ObjectId("575fea19a5ee92201b58011f"),
            "CREATED_AT" : ISODate("2016-06-14T11:27:21.136Z")
        },
        [
          {
           "COMMENT" : "media delete confirmation UI issue",
           "COMMENTED_BY" : ObjectId("575cc0b39dd420a41d202dad"),
           "_id" : ObjectId("575fe9e1a5ee92201b58011e"),
           "CREATED_AT" : ISODate("2016-06-14T11:26:25.003Z")
          }, 
          {
          "COMMENT" : "Could someone explain to me how Luke Ronchi gets in when Tom Latham is a very capable keeper as well as batsman? Why not another specialist batsman/bowler?",
           "COMMENTED_BY" : ObjectId("575cc0b39dd420a41d202dad"),
           "_id" : ObjectId("575fea19a5ee92201b58011f"),
           "CREATED_AT" : ISODate("2016-06-14T11:27:21.136Z")
          }
        ]

我想删除额外的[]括号

Answer 1

这种情况正在发生，因为您只是在更新时将对象数组comment推送到COMMENTS数组字段中。在推送对象数组时使用$each代替。

有关详细信息，请参阅doc-$each。

尝试以下查询。： -

 Complaint.findByIdAndUpdate(
          req.body.complaint.complaintId,
          {$set: {'STATUS': 1}, $push: {"COMMENTS":{$each : comments}},
          {safe: true, upsert: true})

希望这能解决您的问题。

Mongo db更新到数组对象

1 个答案: