Module: Knitsearch::HasManyThroughTargetDependent

Extended by:
ActiveSupport::Concern
Defined in:
lib/knitsearch/has_many_through_target_dependent.rb

Instance Method Summary collapse

Instance Method Details

#knitsearch_refresh_through_parents_from_target ⇒ Object 



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# File 'lib/knitsearch/has_many_through_target_dependent.rb', line 17

def knitsearch_refresh_through_parents_from_target
  dependents = Knitsearch.has_many_through_target_dependents[self.class]
  return unless dependents

  dependents.each do |dependent|
    join_class = dependent[:join_class]
    parent_class = dependent[:parent_class]
    parent_fk = dependent[:parent_fk]
    target_fk = dependent[:target_fk]
    parent_assoc = dependent[:parent_assoc]
    shadow_map = dependent[:columns]
    source_columns = dependent[:source_columns]

    # Guard: only refresh if any indexed source column actually changed
    changed_indexed_columns = saved_changes.keys.map(&:to_sym) & source_columns.map(&:to_sym)
    return if changed_indexed_columns.empty?

    # Find all parent IDs that have this target through any join row
    parent_ids = join_class.where(target_fk => id).pluck(parent_fk).uniq

    # Refresh each affected parent
    parent_ids.each do |parent_id|
      parent = parent_class.find_by(id: parent_id)
      next unless parent

      # Recompute shadow columns for this parent
      updates = {}
      shadow_map.each do |shadow_col, source_col|
        values = parent.send(parent_assoc).pluck(source_col).compact.map(&:to_s)
        updates[shadow_col] = values.any? ? values.join(" ") : nil
      end

      parent.update_columns(updates)
    end
  end
end