ReferenceField 导致 AttributeError: 'function'对象没有属性“__of__”在自定义内容类型中

Question

我创建了一个具有 ReferenceField 的自定义内容类型。当我将 allowed_types 设置为默认内容类型（例如文档或文件夹）时，我在保存或重新索引时不会遇到任何问题。但是，当我将 allowed_types 设置为另一个自定义内容类型时，我收到一个非常奇怪的错误。看来我可以在 ReferenceField 中设置 UID，并且 base_view 不会中断，但我无法保存或重新索引该对象。

使用： 克隆人4.0.1 佐普 2.12.11 Python 2.6.5（r265：79063，2010 年 11 月 21 日，11:58:21）[GCC 4.2.1（Apple Inc. build 5664）]

有什么想法吗？

atapi.ReferenceField(
    'issue_source',
    storage=atapi.AnnotationStorage(),
    widget=atapi.ReferenceWidget(
        label=_(u"Issue Source"),
        description=_(u"Please select the source document to which this issue corresponds."),
    ),
    required=True,
    relationship='issue_issue_source',
    allowed_types=('Source Document'), # specify portal type names here ('Example Type',)
    multiValued=False,            #One to One relationship
),

在 ipzope 中：

>>> issue
<Issue at /Plone/Members/test_user2/test-issue>
>>> issue.isReferenceable
1
>>> source_document
<SourceDocument at /Plone/test-folder/test-doc>
>>> issue.setIssue_source(source_document.UID())
>>> issue.getIssue_source()
<SourceDocument at /Plone/test-folder/test-doc>
>>> source_document
<SourceDocument at /Plone/test-folder/test-doc>
>>> issue.reindexObject()
> /Applications/Plone/plone-site/eggs/Products.CMFDynamicViewFTI-4.0-py2.6.egg/Products/CMFDynamicViewFTI/browserdefault.py(77)__call__()
     76         context = aq_inner(self)
---> 77         template = template.__of__(context)
     78         return template(context, context.REQUEST)
ipdb> quit
------------------------------------------------------------
Traceback (most recent call last):
  File "<ipython console>", line 1, in <module>
  File "/Applications/Plone/plone-site/eggs/Products.Archetypes-1.6.3-py2.6.egg/Products/Archetypes/CatalogMultiplex.py", line 123, in reindexObject
    c.catalog_object(self, url, idxs=lst)
  File "/Applications/Plone/plone-site/eggs/Plone-4.0.1-py2.6.egg/Products/CMFPlone/CatalogTool.py", line 287, in catalog_object
    update_metadata, pghandler=pghandler)
  File "/Applications/Plone/plone-site/eggs/Products.PDBDebugMode-1.3.1-py2.6.egg/Products/PDBDebugMode/zcatalog.py", line 20, in catalog_object
    update_metadata=update_metadata, pghandler=pghandler)
  File "/Applications/Plone/plone-site/eggs/Zope2-2.12.11-py2.6-macosx-10.4-x86_64.egg/Products/ZCatalog/ZCatalog.py", line 529, in catalog_object
    update_metadata=update_metadata)
  File "/Applications/Plone/plone-site/eggs/Zope2-2.12.11-py2.6-macosx-10.4-x86_64.egg/Products/ZCatalog/Catalog.py", line 348, in catalogObject
    self.updateMetadata(object, uid)
  File "/Applications/Plone/plone-site/eggs/Zope2-2.12.11-py2.6-macosx-10.4-x86_64.egg/Products/ZCatalog/Catalog.py", line 278, in updateMetadata
    newDataRecord = self.recordify(object)
  File "/Applications/Plone/plone-site/eggs/Zope2-2.12.11-py2.6-macosx-10.4-x86_64.egg/Products/ZCatalog/Catalog.py", line 417, in recordify
    if(attr is not MV and safe_callable(attr)): attr=attr()
  File "/Applications/Plone/plone-site/eggs/Products.CMFDynamicViewFTI-4.0-py2.6.egg/Products/CMFDynamicViewFTI/browserdefault.py", line 77, in __call__
    template = template.__of__(context)
AttributeError: 'function' object has no attribute '__of__'

当我通过网络单击“保存”时，我收到略有不同的错误消息：

2011-08-09 15:19:16 ERROR Zope.SiteErrorLog 1312895956.510.252592718824 http://127.0.0.1:8080/Plone/Members/test_user2/test-doc/atct_edit
Traceback (innermost last):
  Module ZPublisher.Publish, line 127, in publish
  Module ZPublisher.mapply, line 77, in mapply
  Module Products.PDBDebugMode.runcall, line 70, in pdb_runcall
  Module ZPublisher.Publish, line 47, in call_object
  Module Products.CMFFormController.FSControllerPageTemplate, line 91, in __call__
  Module Products.CMFFormController.BaseControllerPageTemplate, line 28, in _call
  Module Products.CMFFormController.ControllerBase, line 231, in getNext
  Module Products.CMFFormController.Actions.TraverseTo, line 38, in __call__
  Module ZPublisher.mapply, line 77, in mapply
  Module ZPublisher.Publish, line 47, in call_object
  Module Products.CMFFormController.FSControllerPythonScript, line 107, in __call__
  Module Products.CMFFormController.ControllerBase, line 231, in getNext
  Module Products.CMFFormController.Actions.TraverseTo, line 38, in __call__
  Module ZPublisher.mapply, line 77, in mapply
  Module ZPublisher.Publish, line 47, in call_object
  Module Products.CMFFormController.FSControllerPythonScript, line 105, in __call__
  Module Products.CMFFormController.Script, line 145, in __call__
  Module Products.CMFCore.FSPythonScript, line 130, in __call__
  Module Shared.DC.Scripts.Bindings, line 324, in __call__
  Module Shared.DC.Scripts.Bindings, line 361, in _bindAndExec
  Module Products.PythonScripts.PythonScript, line 344, in _exec
  Module script, line 1, in content_edit
   - <FSControllerPythonScript at /Plone/content_edit used for /Plone/Members/test_user2/test-doc>
   - Line 1
  Module Products.CMFCore.FSPythonScript, line 130, in __call__
  Module Shared.DC.Scripts.Bindings, line 324, in __call__
  Module Shared.DC.Scripts.Bindings, line 361, in _bindAndExec
  Module Products.PythonScripts.PythonScript, line 344, in _exec
  Module script, line 13, in content_edit_impl
   - <FSPythonScript at /Plone/content_edit_impl used for /Plone/Members/test_user2/test-doc>
   - Line 13
  Module Products.Archetypes.BaseObject, line 658, in processForm
  Module Products.Archetypes.BaseObject, line 650, in _processForm
   - __traceback_info__: (<Issue at /Plone/Members/test_user2/test-doc>, <Field nextPreviousEnabled(boolean:rw)>, <bound method Issue.setNextPreviousEnabled of <Issue at /Plone/Members/test_user2/test-doc>>)
  Module Products.Archetypes.CatalogMultiplex, line 123, in reindexObject
  Module Products.CMFPlone.CatalogTool, line 287, in catalog_object
  Module Products.PDBDebugMode.zcatalog, line 20, in catalog_object
  Module Products.ZCatalog.ZCatalog, line 529, in catalog_object
  Module Products.ZCatalog.Catalog, line 348, in catalogObject
  Module Products.ZCatalog.Catalog, line 278, in updateMetadata
  Module Products.ZCatalog.Catalog, line 417, in recordify
  Module Products.CMFDynamicViewFTI.browserdefault, line 77, in __call__
AttributeError: 'function' object has no attribute '__of__'
> /Applications/Plone/plone-site/eggs/Products.CMFDynamicViewFTI-4.0-py2.6.egg/Products/CMFDynamicViewFTI/browserdefault.py(77)__call__()
     76         context = aq_inner(self)
---> 77         template = template.__of__(context)
     78         return template(context, context.REQUEST)

Answer 1

这看起来确实很奇怪，一些提示：

将元组传递到 allowed_types 而不是字符串：

allowed_types=('Source Document', ),

确保您没有 id 与目录索引 id 匹配的内容项。另请确保您没有对 getIssue_source 建立索引，但如果需要，请使用 getRawIssue_source。引用字段返回真实内容对象，因此使用普通访问器会将真实内容对象存储在目录中。这会在以后带来很多惊喜和问题。原始访问器返回一个 uuid 或 uuid 列表，您可以在目录查询中使用它们，例如：

query = {'UID': uids}
brains = catalog(query)