Method: StewEucen::Acts::FertileForest::Table::Reconstructers#prune

Defined in:
lib/fertile_forest/modules/reconstructers.rb

#prune(base_obj, with_top = false) ⇒ Boolean

Prune subtree nodes.

Parameters:

  • base_obj (Entity|Integer) —

    Top node to prune.

  • with_top (Boolean) (defaults to: false) —

    Include base node in return query.

Returns:

  • (Boolean) —

    true: Success.

  • (Boolean) —

    false: Failure.



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# File 'lib/fertile_forest/modules/reconstructers.rb', line 573

def prune(base_obj, with_top = false)
  transaction do
    aim_node = ff_resolve_nodes(base_obj, true)       # refresh
    raise ActiveRecord::Rollback if aim_node.blank?   # nil as dubious

    aim_queue = aim_node.ff_queue
    aim_depth = aim_node.ff_depth
    aim_grove = aim_node.ff_grove

    # boundry queue (can be nil)
    aim_boundary_queue = ff_get_boundary_queue(aim_node)

    # for soft delete
    # can not use subquery for same table in UPDATE
    # Mysql2::Error: You can't specify target table 'categories' for update in FROM clause:
    prune_query = ff_subtree_scope(aim_node, with_top, false)

    # soft delete
    if has_soft_delete?
      delete_key = @_ff_soft_delete
      res = prune_query.update_all("#{delete_key} = #{ff_options[:delete_value]}")
    elsif enable_grove_delete?
      grove_key = @_ff_grove
      res = prune_query.update_all("#{grove_key} = #{grove_key} * -1")
    else
      res = prune_query.delete_all
    end

    res
  end   # tansaction end
end