Creating a dictionary schema with Mongoose

Question

I am trying to store a dictionary of objects using Mongoose. Realizing that I lose the change detection for saving with using the Mixed type, I was hoping I could create a schema that would not require the Mixed type.

There are plenty of examples of creating schemas for arrays of objects, but not dictionaries of objects. Is it possible to do this?

Format:

{
    ObjectId : {
        "attempts" : {
            "response" : String,
            "timestamp" : Date
        },
        "complete" : Boolean
    }
}

A schema like you show is fine, but I don't understand why you have `ObjectId` in your example format. — JohnnyHK, Jul 30 '14 at 12:34
It just so happens that the string I am using as the key is an ObjectId — Franz Payer, Jul 30 '14 at 15:47

ma08 · Accepted Answer · 2014-07-30T08:07:53.643

15

There is no support for dictionary in mongoose. Field name can't be dynamic in a schema. You should go with a raw object(embedded document) and implement it as a dictionary. But there will be no validation from mongoose and use markModified before saving whenever you have changed that field

var fooSchema=mongoose.Schema({name:String, dic:{}});
//dic is your dictionary

edited Jul 30 '14 at 08:07

answered Jul 30 '14 at 08:00

ma08

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How can I strict key and value data types? – Rohit Khatri May 23 '19 at 08:54

score 3 · Answer 2 · answered Feb 12 '20 at 10:43

3

Update: from 5.1 mongoose have a Map type: https://mongoosejs.com/docs/schematypes.html#maps

answered Feb 12 '20 at 10:43

rssh

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score 0 · Answer 3 · answered Apr 03 '17 at 00:38

You can have your dictionary like this with meta being a dictionary:

var UserSchema = new Schema({
  meta: {
    votes: Number,
    favs:  Number
  }
  first_name:  String,
  last_name: String,
  profile_pic:   String,
  gender: String,
  timezone: Number
  date: { type: Date, default: Date.now },
  updated: { type: Date, default: Date.now },
  country: {id: Number, name: String}


});

Creating a dictionary schema with Mongoose

3 Answers3

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