CODEWITHSUNDEEP
javascriptnode.jsmongoose
bluefloyd8
bluefloyd8

Reputation: 2276

Custom transform of Mongoose JSON into Javascript object

I would like to specify a custom transform of the JSON received by Mongoose as part of a query into a Javascript object. Typically, JSON.parse() or something similar is used. I would like to use my own transform function because I would like to include a new field called __length which is the length of the JSON received over the network. I do not want to use JSON.stringify(document_from_mongo).length() because I am performing an unnecessary stringify operation.

I have investigated using a custom toObject() or toJSON() method on the schema, but have not had any success. Thanks!

Upvotes: 1

Views: 1289

Answers (1)

Artem Baranovskii
Artem Baranovskii

Reputation: 1013

You can set your own implementation of toJSON at schema level like the following:

var mySchema = new Schema({});

mySchema.set('toJSON', {
    transform: function(doc, ret, options) {
        ret.__length = 'set what do need';
        return ret;
    }
});

mongoose.model('mySchema', mySchema );

Upvotes: 1

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