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orbit-4-1/app/models/page.rb

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class Page
include MongoMapper::Document
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key :name, String
key :parent_page_id, String
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key :content_en, String
key :content_zh_tw, String
key :layout_id, String
key :layout_name, String
key :use_engine, String
key :external_link, String
key :position, Integer
key :is_published, Boolean
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belongs_to :layout
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has_many :children, :class_name => 'Page', :foreign_key => 'parent_page_id'
validates_presence_of :name
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validates_presence_of :position
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before_save :setup_layout_id
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before_validation :setup_default_value
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def self.find_by_name(page_name)
Page.find(:first, :conditions => { :name => page_name, :is_published => true })
end
protected
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def setup_layout_id
if self.layout_name.blank?
self.layout_id = nil
else
self.layout_id = Layout.find_by_name( self.layout_name ).id
end
end
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def setup_default_value
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if self.position.blank?
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max_page = Page.find(:last, :order => 'position')
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self.position = (max_page)? max_page.position.to_i + 1 : 1
end
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if self.parent_page_id.blank?
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self.parent_page_id = "root"
end
end
end