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17 lines
606 B
Ruby
17 lines
606 B
Ruby
class Dependency < ApplicationRecord
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# touch to make sure todo caches for predecessor and successor are invalidated
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belongs_to :predecessor, :foreign_key => 'predecessor_id', :class_name => 'Todo', :touch => true
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belongs_to :successor, :foreign_key => 'successor_id', :class_name => 'Todo', :touch => true
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validate :check_circular_dependencies
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def check_circular_dependencies
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unless predecessor.nil? or successor.nil?
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errors.add("Depends on:", "Adding '#{successor.specification}' would create a circular dependency") if successor.is_successor?(predecessor)
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end
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end
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end
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