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class GroupPermission < ActiveRecord::Base
attr_accessible :group_id, :permission, :target_group_id
PERMISSION_TYPES = ['pickup']
belongs_to :group
belongs_to :target_group, :class_name => "Group"
validates :target_group_id,
:presence => true,
:uniqueness => { :scope => [:group_id, :permission] }
validates :target_group,
:presence => true
validates :permission,
:presence => true,
:uniqueness => { :scope => [:group_id, :target_group_id] },
:inclusion => { :in => PERMISSION_TYPES }
def to_s
"#{self.permission} => #{self.target_group}"
end
end
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