Mongoose __v property - hide?

Mongoose adds a '__v' property into Schema's for versioning - is it possible to disable this globally or globally hide it from all queries?

You can disable the "__v" attribute in your Schema definitions by setting the versionKey option to false. For example:

var widgetSchema = new Schema({ ... attributes ... }, { versionKey: false });

I don't think you can globally disable them, but can only do it per Schema. You can read more about Schema's options here. You might also find the Schema set method helpful.

To disable '__v' property, which is not recommended, use the versionKey schema option:

var Schema = new Schema({...}, { versionKey: false });

To hide it from all queries, which sometimes can be not what you want too, use the select schema type option:

var Schema = new Schema({ __v: { type: Number, select: false}})

Two ways:

1. {versionKey: false}

2. when you query, like model.findById(id).select('-__v')

'-' means exclude the field

define a toObject.transform function, and make sure you always call toObject when getting documents from mongoose.

var SomeSchema = new Schema({
    <some schema spec>
  } , {
    toObject: {
      transform: function (doc, ret, game) {
        delete ret.__v;
      }
    }
});

Try this it will remove _v from every query response.

// transform for sending as json
function omitPrivate(doc, obj) {
    delete obj.__v;
    return obj;
}

// schema options
var options = {
    toJSON: {
        transform: omitPrivate
    }
};
// schema
var Schema = new Schema({...}, options);

You may not want to disable __v, other answers provide few links to answer why you shouldn't disable it.

I've used this library to hide the __v and _id

https://www.npmjs.com/package/mongoose-hidden

let mongooseHidden = require("mongoose-hidden")();

// This will add `id` in toJSON
yourSchema.set("toJSON", {
        virtuals: true,
    });

// This will remove `_id` and `__v` 
yourSchema.plugin(mongooseHidden);

Now __v will exist, but it won't be returned with doc.toJSON().

Hope it helps.

You can use a Query Middleware to exclude any field from the output. In your case you can use this:

// '/^find/' is a regex that matches queries that start with find
// like find, findOne, findOneAndDelete, findOneAndRemove, findOneAndUpdate
schema.pre(/^find/, function(next) {
    // this keyword refers to the current query
    // select method excludes or includes fields using + and -
    this.select("-__v");
    next();
});

For more information in docs lookup: Middlewares select method

Yes, it is simple, just edit the "schema.js" file that is inside

"node_modules\mongoose\lib"

Search for "options = utils.options ({ ... versionKey: '__v'..." and change value "__v" to false.

This will change all post requests. (versionKey: '__v' => versionKey: false)