python - 如何在 django 模板中获取引用属性

Question

我在 Google 应用引擎上使用 aep

class Link():
     bag  = db.Referencepropery(Bag) #bag have name, id and other property
     name = db.Stringpropery


object_query = Link.all();
p = paginator( object_query)
object_list = p.page(1);
prefetch_references( object_list.object_list, 'bag')

render_to_response(...,{'object_list':object_list.object_list},...)


#template
{% for object in object_list%}
 {{object.bag.id}} <!--failed to get any value, why???/-->
{% end %}

Answer 1

您的代码有几个问题:

• 您的模型类需要扩展 db.Model
• 您的属性需要调用构造函数，而不仅仅是引用它
• StringProperty 不是引用，因此“prefetch_reference(objectlist, 'name')”没有任何意义。

下面这个更有意义:

class Link(db.Model):
     bag = db.ReferenceProperty(Bag) #bag have name, id and other property
     name = db.StringPropery()

def view():
     objectlist = get_object_list(.....)
     prefetch_reference(objectlist,'name')