mongoose-pusher

Mongoose plugin to allow "pusher" and "puller" functions which acts like setters for arrays.

Install

npm install mongoose-pusher --save

Usage

var mongoose = require('mongoose')
  , Schema = mongoose.Schema
  , pusherPlugin = require('mongoose-pusher');

var SomeSchema = new Schema({
  someArrayField: {
    type: [String], // can be any type
    push: function (val) { return modify(val); }
    pull: function (val) { this.notifyValueBeingPulled(val); }
  }
});

SomeSchema.plugin(pusherPlugin);

SomeSchmea.methods.notifyValueBeingPulled = function (val) {
  /*...*/
};

var SomeModel = mongoose.model('SomeModel', SomeSchema);

// These functions call the setter, which is custom from the plugin
var someObject = new SomeModel({
  someArrayField: ['a', 'b', 'c'] // called through modified setter
});
someObject.set('someArrayField', ['c', 'b', 'a']);

// These functions are modified to call the pusher
someObject.someArrayField.push('x', 'y', 'z');
someObject.someArrayField.nonAtomicPush('i', 'j', 'k');
someObject.someArrayField.unshift('xx', 'yy');

// These call pusher and puller (if necessary)
someObject.someArrayField.splice(1, 4, 'zj1', 'fix')
someObject.someArrayField.set(8, 'foo');

// These call the puller
someObject.someArrayField.pull('foo', 'bar');
someObject.someArrayField.pop();
someObject.someArrayField.$pop();
someObject.someArrayField.shift();
someObject.someArrayField.$shift();

Notes

• push and pull are called for each element of the array and are never called with more than one element (no need to slice arguments).
• push is called for each element to be added to the array whenever the array is constructed with elements or one of push, nonAtomicPush, set, addToSet, splice, and unshift functions are called.
  • addToSet will call push for all elements regardless of whether its already in the set.
• pull is called for each element removed from the array whenever one of pull, pop, $pop, shift, $shift, set, or splice are called.
  • pull, like addToSet, might call the puller for elements that aren't in the set.
• push and pull, like set, are called with the context of the parent document.
• push or pull are not mutually required or exclusive, that is they do not have to both be specified, but they can be.
• Use of push will override the setter on the field, so if you put a setter in, push will not be called upon construction.

License

MIT found in LICENSE file.