插件显示 HasCustomFields::NotPreloadedError

代码:

field = 'video_url'
register_post_custom_field_type(field, :string)
register_topic_custom_field_type(field, :string)
add_preloaded_topic_list_custom_field(field)

add_to_serializer(:topic_list_item, field.to_sym) { object.custom_fields[field] }

add_to_serializer(:topic_view, field.to_sym) { object.topic.custom_fields[field] }

add_to_serializer(:search_topic_list_item, field.to_sym) { object.custom_fields[field] }

我在插件中添加了一段代码,用于在搜索列表中返回自定义字段,但发生了一个异常。添加的代码是:

add_to_serializer(:search_topic_list_item, field.to_sym) { object.custom_fields[field] }

错误:

HasCustomFields::NotPreloadedError (Attempted to access the non preloaded custom field 'video_url' on the 'Topic' class. This is disallowed to prevent N+1 queries.) app/models/concerns/has_cus

有人遇到过这个问题吗?非常感谢您的帮助。