mongoose-strip-paths

A mongoose plugin that deletes provided paths on a document and its sub documents, if any.

How it works

When instantiated, this plugin adds a static method stripPaths() to your schema. Upon invoking this method, it loops over the provided paths in the options.paths variable and sets them to undefined. If there are any nested sub documents (via a single nested schema or embedded within an array), the stripPaths() method of all respective sub documents is also invoked. This works for nested subdocuments as well as documents added via a populate query.

Note that there will be no validation done upon invoking the stripPaths() method, which means that the document could be in an invalid state. As of version 0.0.2 stripPaths() also returns a reference to the document for easy chaining.

This functionality should ideally only be used to return the document for further processing.

Usage

For example, given schemas as follows:

let mongoose = require("mongoose");
let mongooseStripPaths = require("mongoose-strip-paths").mongooseStripPaths;
let Schema = mongoose.Schema;

let PostSchema = new Schema({
  title: String,
  message: String,
  fieldToStrip: String
});

PostSchema.plugin(mongooseStripPaths, { paths: ["fieldToStrip"] });

let UserSchema = new Schema({
  username: String,
  createdAt: { type: Date, required: true },
  posts: [Post]
});

// note that if you add 'posts', then the posts field will be removed,
// also note that after stripping 'createdAt' mongoose validation will fail on trying to save it
UserSchema.plugin(mongooseStripPaths, { paths: ["createdAt"] });

let User = mongoose.model("User", UserSchema);

Calling the strip fields method on a user will result in the following document:

let user = new User({
  username: 'u1',
  createdAt: new Date(),
  posts: []
});

user.posts.push({
  title: 'first post',
  message: 'hello',
  fieldToStrip: 'some internal data'
});

user.posts.push({
  title: 'second post',
  message: 'world',
  fieldToStrip: 'some more internal data'
});

user.stripPaths();

// user document is now
{
  _id: ...,
  username: 'u1',
  posts: [
    {
      _id: ...,
      title: 'first post',
      message: 'hello'
    },
    {
      _id: ...,
      title: 'second post',
      message: 'world'
    }
  ]
}

// another example

let userObj = user.stripPaths().toObject();

Required options

• path: an array list of the required paths to remove. See object-path api for more path notations.

Requirements

• Node >=6
• MongoDB >=2.6.10
• Mongoose >=4.11.0

Installation

npm install mongoose-strip-paths

Testing

0. Install dependencies with npm install and install mongo if you don't have it yet.
1. Start mongo with mongod.
2. Run tests with npm test. Additionally you can pass your own mongodb uri as an environment variable if you would like to test against your own database, for e.g. URI='mongodb://username:password@localhost/mongoose-strip-paths-test' npm test

Publishing

release-it

release-it patch,minor,major

Manual

• npm version patch,minor,major
• npm publish

Changelog

1.0.1

• Update development dependencies

1.0.0

• Fix bug where the _id and __v properties could be stripped on the root object
• Add mongoose >= 5.x support
• Update development dependencies
• Drop Node.js 4.x support

Misc

Issues, comments, PRs all welcome.