mongoose-history

Keeps a history of all changes of a document.

Mongoose History Plugin

Keeps a history of all changes of a document.

npm install mongoose-history

Or add it to your package.json

For starting history of your collection, you need to simply add the mongoose-history plugin:

var mongoose        = require('mongoose')
  , mongooseHistory = require('mongoose-history')
  , Schema          = mongoose.Schema
 
var Post = new Schema({
    title:       String
  , message:     String
  , updated_for: String
})
 
Post.plugin(mongooseHistory)

The plugin will create a new collection with format: originalCollectionName + _history, in example: posts_history. You can also change the name of the collection by setting the configuration customCollectionName:

var options = {customCollectionName: "post_hst"}
Post.plugin(mongooseHistory, options)

The history documents have the format:

{
    _id:  ObjectId,
    t: Date // when history was made 
    o: "i" (insert) | "u" (update) | "r" (remove) // what happens with document 
    d: {  // changed document data 
        _id:         ObjectId
      , title:       String
      , message:     String
      , updated_for: String
    }
}

To improve queries perfomance in history collection you can define indexes, for example:

var options = {indexes: [{'t': -1, 'd._id': 1}]};
Post.plugin(mongooseHistory, options)

You can keep your history collection far away from your primary database or replica set. This can be useful for improve the architecture of your system.

Just create another connection to the new database and link the reference in historyConnection:

var secondConn = mongoose.createConnection('mongodb://localhost/another_conn');
var options = {historyConnection: secondConn}
Post.plugin(mongooseHistory, options)

All modules with history plugin have following methods:

Get History Model of Model;

Clear all History collection;

  • Rollback methods;
  • Recreate all the collection from the historic;

Copyright (c) 2013, Nassor Paulino da Silva nassor@gmail.com All rights reserved.

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