Module: CollectiveIdea::Acts::NestedSet::Model::Prunable
- Defined in:
- lib/awesome_nested_set/model/prunable.rb
Instance Method Summary collapse
-
#destroy_descendants ⇒ Object
Prunes a branch off of the tree, shifting all of the elements on the right back to the left so the counts still work.
- #destroy_or_delete_descendants ⇒ Object
- #diff ⇒ Object
- #update_siblings(direction) ⇒ Object
- #update_siblings_for_remaining_nodes ⇒ Object
Instance Method Details
#destroy_descendants ⇒ Object
Prunes a branch off of the tree, shifting all of the elements on the right back to the left so the counts still work.
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# File 'lib/awesome_nested_set/model/prunable.rb', line 9 def destroy_descendants return if right.nil? || left.nil? || skip_before_destroy in_tenacious_transaction do # Rescue from +ActiveRecord::RecordNotFound+ error as there may be a case # that an +object+ has already been destroyed by its parent, but objects that are # in memory are not aware about this. begin reload_nested_set rescue ActiveRecord::RecordNotFound self.skip_before_destroy = true return true end # select the rows in the model that extend past the deletion point and apply a lock nested_set_scope.right_of(left).select(primary_id).lock(true) return false unless destroy_or_delete_descendants # update lefts and rights for remaining nodes update_siblings_for_remaining_nodes # Reload is needed because children may have updated their parent (self) during deletion. reload # Don't allow multiple calls to destroy to corrupt the set self.skip_before_destroy = true end end |
#destroy_or_delete_descendants ⇒ Object
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# File 'lib/awesome_nested_set/model/prunable.rb', line 38 def destroy_or_delete_descendants if [:dependent] == :destroy descendants.each do |model| model.skip_before_destroy = true model.destroy end elsif [:dependent] == :restrict_with_exception raise ActiveRecord::DeleteRestrictionError.new(:children) unless leaf? return true elsif [:dependent] == :restrict_with_error unless leaf? record = self.class.human_attribute_name(:children).downcase errors.add(:base, :"restrict_dependent_destroy.#{Rails::VERSION::MAJOR < 5 ? 'many' : 'has_many'}", record: record) return false end return true elsif [:dependent] == :nullify descendants.update_all(parent_column_name => nil) else descendants.delete_all end end |
#diff ⇒ Object
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# File 'lib/awesome_nested_set/model/prunable.rb', line 74 def diff right - left + 1 end |
#update_siblings(direction) ⇒ Object
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# File 'lib/awesome_nested_set/model/prunable.rb', line 66 def update_siblings(direction) full_column_name = send("quoted_#{direction}_column_full_name") column_name = send("quoted_#{direction}_column_name") nested_set_scope.where(["#{full_column_name} > ?", right]). update_all(["#{column_name} = (#{column_name} - ?)", diff]) end |
#update_siblings_for_remaining_nodes ⇒ Object
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# File 'lib/awesome_nested_set/model/prunable.rb', line 61 def update_siblings_for_remaining_nodes update_siblings(:left) update_siblings(:right) end |