50 lines
1.3 KiB
Ruby
50 lines
1.3 KiB
Ruby
# frozen_string_literal: true
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class IssueLink < ApplicationRecord
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include FromUnion
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belongs_to :source, class_name: 'Issue'
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belongs_to :target, class_name: 'Issue'
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validates :source, presence: true
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validates :target, presence: true
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validates :source, uniqueness: { scope: :target_id, message: 'is already related' }
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validate :check_self_relation
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validate :check_opposite_relation
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scope :for_source_issue, ->(issue) { where(source_id: issue.id) }
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scope :for_target_issue, ->(issue) { where(target_id: issue.id) }
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TYPE_RELATES_TO = 'relates_to'
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TYPE_BLOCKS = 'blocks'
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# we don't store is_blocked_by in the db but need it for displaying the relation
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# from the target (used in IssueLink.inverse_link_type)
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TYPE_IS_BLOCKED_BY = 'is_blocked_by'
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enum link_type: { TYPE_RELATES_TO => 0, TYPE_BLOCKS => 1 }
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def self.inverse_link_type(type)
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type
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end
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private
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def check_self_relation
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return unless source && target
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if source == target
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errors.add(:source, 'cannot be related to itself')
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end
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end
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def check_opposite_relation
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return unless source && target
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if IssueLink.find_by(source: target, target: source)
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errors.add(:source, 'is already related to this issue')
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end
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end
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end
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IssueLink.prepend_mod_with('IssueLink')
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