module Ancestry::MaterializedPathPg
Public Instance Methods
update_descendants_with_new_ancestry()
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Update descendants with new ancestry (after update)
# File lib/ancestry/materialized_path_pg.rb, line 4 def update_descendants_with_new_ancestry # If enabled and node is existing and ancestry was updated and the new ancestry is sane ... if !ancestry_callbacks_disabled? && !new_record? && ancestry_changed? && sane_ancestor_ids? ancestry_column = ancestry_base_class.ancestry_column old_ancestry = generate_ancestry( path_ids_before_last_save ) new_ancestry = generate_ancestry( path_ids ) update_clause = [ "#{ancestry_column} = regexp_replace(#{ancestry_column}, '^#{Regexp.escape(old_ancestry)}', '#{new_ancestry}')" ] if ancestry_base_class.respond_to?(:depth_cache_column) && respond_to?(ancestry_base_class.depth_cache_column) depth_cache_column = ancestry_base_class.depth_cache_column.to_s update_clause << "#{depth_cache_column} = length(regexp_replace(regexp_replace(ancestry, '^#{Regexp.escape(old_ancestry)}', '#{new_ancestry}'), '[^#{ancestry_base_class.ancestry_delimiter}]', '', 'g')) #{ancestry_base_class.ancestry_format == :materialized_path2 ? '-' : '+'} 1" end unscoped_descendants_before_save.update_all update_clause.join(', ') end end