mongodb: pull one item from nested array of references

Question

I have a nested array of references

const userSchema = new Schema(
  {
    _id: Schema.Types.ObjectId,
    name: String,
   posts: [{ type: Schema.Types.ObjectId, ref: "Post" }]
  }
);

from that array I want to remove one reference, I assumed this would be easy using

 User.update({ name: currentName}, { $pull: { posts: postId }});

this and variations like

 User.update(
    { name: currentName},
    { $pull: { posts: mongoose.Types.ObjectId(postId) } }
  );

or using findOneAndUpdate all didn't work for me.

postId is formated like for example "5c150b855999681f7423aacb"

krbalaji · Accepted Answer · 2018-12-15 14:53:53Z

1

User.findOneAndUpdate({
_id: mongoose.Types.ObjectId('YOUR_DATA_ID')
},
{ name: currentName,
{ $pull: { posts: mongoose.Types.ObjectId(postId) } }
);

answered Dec 15, 2018 at 14:53

krbalaji

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2 Comments

why did you put the id: mongoose.Types.ObjectId('YOUR_DATA_ID') there? It worked without it for me.

name is not an unique one. if you use findOneAndUpdate, need to find an unique value in records.So I use to findOne with _id and Update the records