orbit-basic/app/models/layout.rb

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class Layout < DesignFile
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embedded_in :design
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attr_reader :content
field :name, :index => true
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references_many :children, :class_name => "Item"
has_many :layout_parts
validates_presence_of :name
validates_format_of :name, :with => /^[0-9a-zA-Z\-_]+$/
validates_uniqueness_of :name
def content
self.file.read
end
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def self.exist_one?
Layout.count > 0
end
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end