mm_no_empties

Models that use this plugin do not persist empty Arrays, Hashes or Sets. Nil values are also excluded as per standard MM behaviour.

Requirements

Ruby 1.9
MongoMapper 0.10.1 or greater

Installation

Add this to your Gemfile if using Bundler: gem 'mm_no_empties'

Or install the gem from the command line: gem install mm_no_empties

Usage

Use the MongoMapper plugin method to add MmNoEmpties to your model, for example:

class Group
  include MongoMapper::Document
  plugin  MmNoEmpties

  many :people, :class_name => 'Person'

  key  :names,  Array
  key  :counts, Hash
  key  :tags,   Set
end