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							class SubRole < Attribute
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							  belongs_to :role
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							  has_and_belongs_to_many :users
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							  has_and_belongs_to_many :statuses, :autosave => true, :dependent => :destroy
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							  # Get an sub_role from key
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							  def self.get_sub_role_from_key(key)
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							    self.first(:conditions => {:key => key})
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							  end
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							end |