plone - Plone 灵巧关系列表的动态源

Question

我有一个 Plone (4.2) 形式。我想要一个特定领域的动态来源。架构的相关部分:

from plone.directives import form
from z3c.relationfield.schema import RelationList, RelationChoice
from five import grok
from plone.formwidget.contenttree import ObjPathSourceBinder


@grok.provider(ISourceContextBinder)
def availableAttachments(context)
    return ObjPathSourceBinder()


class IEmailFormSchema(form.Schema):

    attachments = RelationList(
        title = _(u'Attachments'),
        description = _(u'Select and upload attachments.'),
        default = [],
        value_type = RelationChoice(
                    title =_(u"attachment"),
                    default = [],
                    # source = ObjPathSourceBinder() # this works
                    source = availableAttachments),  # should do the same, but doesn't

        required = False
    )

这将导致:

ValueError: Invalid clone vocabulary

我尝试了 plone dexterity developer manual 中描述的每个变体.与装饰器结合的方法 source RelationChoice 的属性(见上文)和一个命名的 Vocabulary 类都具有相同的结果。

Answer 1

我应该调用 ObjPathSourceBinder，而不是寻求帮助。目的。此代码按预期工作:

@grok.provider(IContextSourceBinder)
def availableAttachments(context):

    path = '/'.join(context.getTmp_folder().getPhysicalPath())
    query = { "portal_type" : ("File","Image"),
              "path": {'query' :path } 
             }

    return ObjPathSourceBinder(navigation_tree_query = query).__call__(context) 

结合我的问题中的架构代码。