reload_schema_from_cache

# File activerecord/lib/active_record/model_schema.rb, line 498
        def reload_schema_from_cache
          @arel_table = nil
          @column_names = nil
          @symbol_column_to_string_name_hash = nil
          @attribute_types = nil
          @content_columns = nil
          @default_attributes = nil
          @column_defaults = nil
          @inheritance_column = nil unless defined?(@explicit_inheritance_column) && @explicit_inheritance_column
          @attributes_builder = nil
          @columns = nil
          @columns_hash = nil
          @schema_loaded = false
          @attribute_names = nil
          @yaml_encoder = nil
          direct_descendants.each do |descendant|
            descendant.send(:reload_schema_from_cache)
          end
        end