orbit-basic/app/models/snippet.rb

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class Snippet
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include MongoMapper::Document
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key :name, String, :required => true, :index => true
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key :full_name, String, :required => true, :index => true
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key :parent_name, String, :required => true, :index => true
key :parent_id, ObjectId, :required => true, :index => true
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key_i18n :content, String
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before_validation :setup_default_value
validates_uniqueness_of :name, :scope => :parent_id
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belongs_to :parent, :class_name => "Snippet", :foreign_key => :parent_id
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protected
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def ancestors
node, nodes = self, []
nodes << node = node.parent while !node.parent.blank?
nodes.reverse
end
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def setup_default_value
self.parent_id = Item.find_by_name( self.parent_name ).id
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full_node = self.ancestors.map{ |a| a.name }.push( self.name )
full_node.shift if full_node.size >= 2
self.full_name = full_node.join("/")
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end
end