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MongoMapper extension for accepts_nested_attributes

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Installation:

gem install mm-nested-attrs

Using:

In your parent class:

class Parent
  include MongoMapper::Document
  plugin MongoMapper::Plugins::Associations::NestedAttributes
  accepts_nested_attributes_for :images, :allow_destroy => true, :reject_if => lambda { |t| t['img'].blank? }
end

In Gemfile

 gem 'mm-nested-attrs'