我正在尝试使用 z3c.forms 开发一个新的小部件，并且我已经到了可以进行功能测试的地步。
不幸的是，当我使用表单设置测试时，当调用 updateWidgets 时会为 IWidgets 接口引发 ComponentLookupError，它应该只是从 z3c.form.field 中查找 FieldWidgets
我猜我没有在测试设置中正确注册 z3c.form，但我不知道如何修复它。
这是测试代码：
import unittest2 as unittest
import zope.interface
import zope.schema
from z3c.schema.optchoice import OptionalChoice
from zope.app.testing import setup as ztc_setup
from z3c.form.testing import TestRequest
from zope.schema.vocabulary import SimpleVocabulary, SimpleTerm
from zope.traversing.adapters import DefaultTraversable
from z3c.form import form, field
from widget import OptChoiceWidget, OptChoiceWidgetCustomTokenFactoryFactory
sample_terms = SimpleVocabulary([
SimpleTerm(value="first", title="First"),
SimpleTerm(value="second", title="Second")
])
class ISchema(zope.interface.Interface):
test_name = OptionalChoice(
title= u"This is a title",
values=sample_terms,
value_type=zope.schema.TextLine(),
)
class SampleForm(form.BaseForm):
widgets = [OptChoiceWidget]
fields = field.Fields(ISchema)
fields['test_name'].widgetFactory = OptChoiceWidgetCustomTokenFactoryFactory(('other', "Other"))
ignoreContext = True
class TestFunctionalForm(unittest.TestCase):
def setUp(self):
#plone.z3cform/tests.py
component.provideAdapter(DefaultTraversable, [None])
self.context = ztc_setup.placefulSetUp(True)
def tearDown(self):
ztc_setup.placefulTearDown()
def test_add_form(self):
sample_form = SampleForm(self.context, TestRequest())
data = sample_form.update()
错误信息：
ERROR: test_add_form (z3cwidgetoptchoice.tests.TestFunctionalForm)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/home/alex/git/z3c.widget.optchoice/z3cwidgetoptchoice/tests.py", line 174, in test_add_form
data = sample_form.update()
File "/home/alex/.virtualenvs/optchoice/lib/python2.6/site-packages/z3c.form-2.9.1-py2.6.egg/z3c/form/form.py", line 150, in update
self.updateWidgets()
File "/home/alex/.virtualenvs/optchoice/lib/python2.6/site-packages/z3c.form-2.9.1-py2.6.egg/z3c/form/form.py", line 127, in updateWidgets
(self, self.request, self.getContent()), interfaces.IWidgets)
File "/home/alex/.virtualenvs/optchoice/lib/python2.6/site-packages/zope.component-4.0.1-py2.6.egg/zope/component/_api.py", line 112, in getMultiAdapter
raise ComponentLookupError(objects, interface, name)
ComponentLookupError: ((<z3cwidgetoptchoice.tests.SampleForm object at 0x462d990>, <z3c.form.testing.TestRequest instance URL=http://127.0.0.1>, <zope.site.folder.Folder object at 0x3f070c8>), <InterfaceClass z3c.form.interfaces.IWidgets>, u'')
这是我在堆栈跟踪中戳：
test_add_form (z3cwidgetoptchoice.tests.TestFunctionalForm) ... > /home/alex/.virtualenvs/optchoice/lib/python2.6/site-packages/zope.component-4.0.1-py2.6.egg/zope/component/_api.py(112)getMultiAdapter()
-> raise ComponentLookupError(objects, interface, name)
(Pdb) up
> /home/alex/.virtualenvs/optchoice/lib/python2.6/site-packages/z3c.form-2.9.1-py2.6.egg/z3c/form/form.py(127)updateWidgets()
-> (self, self.request, self.getContent()), interfaces.IWidgets)
(Pdb) self
<z3cwidgetoptchoice.tests.SampleForm object at 0x462d990>
(Pdb) self.request
<z3c.form.testing.TestRequest instance URL=http://127.0.0.1>
(Pdb) self.getContent()
<zope.site.folder.Folder object at 0x3f070c8>
(Pdb) list
122 return self.context
123
124 def updateWidgets(self, prefix=None):
125 '''See interfaces.IForm'''
126 self.widgets = zope.component.getMultiAdapter(
127 -> (self, self.request, self.getContent()), interfaces.IWidgets)
128 if prefix is not None:
129 self.widgets.prefix = prefix
130 self.widgets.mode = self.mode
131 self.widgets.ignoreContext = self.ignoreContext
132 self.widgets.ignoreRequest = self.ignoreRequest
(Pdb) c
ERROR
更新：
我还尝试在实例化 Sample 表单之前显式注册接口，但这并没有帮助，并且 ComponentLookupError 再次引发。
from z3c.form import form, field, interfaces
zope.interface.classImplementsOnly(field.FieldWidgets,
interfaces.IWidgets)