Need to push data in nested subdocument array

Question

I need to push data in nested subdocument array(replyComment):

This is an example of a document from my database:

{
  comments: [
    {
      replyComment: [],
      _id: 601a673735644c83e0aa1be3,
      username: '[email protected]',
      email: '[email protected]',
      comment: 'test123'
    },
    {
      replyComment: [],
      _id: 601a6c94d1653c618c75ceae,
      username: '[email protected]',
      email: '[email protected]',
      comment: 'reply test'
    }
  ],
  _id: 601a3b8038b13e70405cf9ea,
  title: 'latest test',
  snippet: 'latest test snippet',
  body: 'latest test body',
  createdAt: 2021-02-03T05:58:24.123Z,
  updatedAt: 2021-02-03T12:28:33.237Z,
  __v: 7
}

I am also mentioning my code snippet:

app.post('/:id/replyComment',(req,res) => { 
  const replyComm = new Comment(req.body);
  Topic.findById(req.params.id)
  .then((result) => {
    topic = result,
    console.log(topic);
    topic.update({_id:req.params.id, "comments._id": req.body.comment_id},
      { $push: {"comments.$.replyComment": {replyComment: replyComm}}}
    )
    topic.save()
    .then((result) => {
      // console.log(result);
        res.send({
          text: "Replied",
        })
    })
    .catch((err) => {
        console.log(err);
    });
  })
});

By running the request I am not getting any error but still the same documented is getting printed on my terminal and there is no change in "replyComment" subarray. Pls suggest how to make this work or any alternate method.

topic.comments.id is a variable, not a function, why are you trying to do topic.comments.id(req.params.id)? — J.F.
– J.F., Commented Feb 3, 2021 at 12:42

perona chan · Accepted Answer · 2021-02-03 17:59:33Z

0

I prefer to use objects instead of arrays by converting objects to the array Object.keys(data.comments)

{
  comments: 
    {
     '601a673735644c83e0aa1be3':{
        username: '[email protected]',
        email: '[email protected]',
        comment: 'test123'
      }
    },
    {
     '601a6c94d1653c618c75ceae':{
        username: '[email protected]',
        email: '[email protected]',
        comment: 'reply test'
     }
    },
  _id: 601a3b8038b13e70405cf9ea,
  title: 'latest test',
  snippet: 'latest test snippet',
  body: 'latest test body',
  createdAt: 2021-02-03T05:58:24.123Z,
  updatedAt: 2021-02-03T12:28:33.237Z,
  __v: 7
}

answered Feb 3, 2021 at 17:59

perona chan

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Comments

Mohammad Yaser Ahmadi · Accepted Answer · 2021-02-07 09:06:09Z

0

define topic variable like this :

let topic = result;
console.log(topic);
topic.update({_id:req.params.id, "comments._id": req.body.comment_id},
    { $push: {"comments.$.replyComment": {replyComment: replyComm}}}
)

answered Feb 7, 2021 at 9:06

Mohammad Yaser Ahmadi

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