我创建了两种敏捷类型:lab_equipment.py、class_activity.py。class_activity 类型包含以下与 lab_activity 类型的关系:
类活动.py:
class IClassActivity(form.Schema, IImageScaleTraversable):
[...]
dexteritytextindexer.searchable('apparatus')
apparatus = RelationList(
title=_(u"Apparatus"),
description=_(u"Choose equipment used in this activity"),
value_type=RelationChoice(
source=ObjPathSourceBinder(
object_provides=ILabEquipment.__identifier__,
navigation_tree_query= {'path': {'query':'/Plone/ug-demos/equipment'}},
),
),
)
[...]
现在我需要从 lab_equipment 页面模板中的 class_activity 类型中列出相关成员。
有没有办法将 RelationList 从 class_activity 类型反向引用到 lab_activity 类型,然后将此列表显示到页面模板中?