20 lines
456 B
Ruby
Executable file
20 lines
456 B
Ruby
Executable file
class Topic < ActiveRecord::Base
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has_many :replies, :dependent => :destroy, :foreign_key => "parent_id"
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serialize :content
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before_create :default_written_on
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before_destroy :destroy_children
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def parent
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Topic.find(parent_id)
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end
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protected
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def default_written_on
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self.written_on = Time.now unless attribute_present?("written_on")
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end
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def destroy_children
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self.class.delete_all "parent_id = #{id}"
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end
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end |