Question

我正在尝试创建一个自定义窗口小部件，以便与zope.schema.Dict字段一起使用。密钥将自动从用户列表中提取，值将是选择词汇之一。我大部分或多或少都在工作，但我的问题是在保存表单时。我正在使用plone.app.registry.browser.controlpanel.RegistryEditForm视图，架构包含有问题的Dict字段。我收到以下错误：

Traceback (innermost last):
  Module ZPublisher.Publish, line 60, in publish
  Module ZPublisher.mapply, line 77, in mapply
  Module ZPublisher.Publish, line 46, in call_object
  Module plone.z3cform.layout, line 70, in __call__
  Module plone.z3cform.layout, line 54, in update
  Module plone.z3cform.fieldsets.extensible, line 59, in update
  Module plone.z3cform.patch, line 30, in GroupForm_update
  Module z3c.form.group, line 138, in update
  Module z3c.form.action, line 99, in execute
  Module z3c.form.button, line 315, in __call__
  Module z3c.form.button, line 170, in __call__
  Module plone.app.registry.browser.controlpanel, line 55, in handleSave
  Module z3c.form.group, line 92, in extractData
  Module z3c.form.form, line 145, in extractData
  Module z3c.form.field, line 301, in extract
  Module zope.component.hooks, line 104, in adapter_hook
  Module z3c.form.converter, line 79, in FieldWidgetDataConverter
  Module zope.component._api, line 120, in queryMultiAdapter
  Module zope.component.registry, line 238, in queryMultiAdapter
  Module zope.interface.adapter, line 532, in queryMultiAdapter
  Module z3c.form.converter, line 71, in __init__
TypeError: Field ``mypackage_dict`` of type ``Dict`` must provide ``IFromUnicode``.

我尝试创建转换器，但我显然做错了。

小部件代码：

class MyPackageWidget(Widget):
    implementsOnly(IMyPackageWidget)

    klass = u'mypackage-widget'
    input_template = ViewPageTemplateFile("input.pt")

    def render(self):
        if self.mode == INPUT_MODE:
            return self.input_template()

    def users(self):
        utility = getUtility(IMyPackageUtility)
        frequencies = utility.frequencies()
        for usr in plone.api.user.get_users():
            user_id = usr.getId()
            yield {'id': user_id,
                   'myvalue': frequencies.get(user_id),
                   'name': usr.getProperty('fullname') or user_id}

    def extract(self, default=NO_VALUE):
        field_key = self.name + '.'
        myvalues = {}
        for key in self.request.keys():
            if key.startswith(field_key):
                user_id = safe_unicode(key[len(field_key):])
                value = self.request.get(key)
                myvalues[user_id] = value
        return myvalues

    def options(self):
        for term in frequencies._terms:
            yield {'value': term.value,
                   'content': term.title}


@adapter(IDict, IFormLayer)
@implementer(IFieldWidget)
def MyPackageFieldWidget(field, request):
    """ IFieldWidget factory for MyPackageWidget
    """
    return FieldWidget(field, MyPackageWidget(request))


class MyPackageDataConverter(BaseDataConverter):
    """Convert between the context and the widget"""

    adapts(IDict, IMyPackageWidget)

    def toWidgetValue(self, value):
        return value

    def toFieldValue(self, value):
        return value

转换器实际上还没有做任何事情。我不知道它还需要做什么，但是我在这些方法中加入了一个堆栈跟踪，它从来就没有被击中过。我确实验证了提取代码将数据格式化为有意义的东西，并且应该满足我定义的字段。

zcml：

  <class class=".widgets.MyPackageWidget">
    <require
        permission="zope.Public"
        interface="my.package.interfaces.widget.IMyPackageWidget"
        />
  </class>

  <adapter
        factory=".widgets.MyPackageDataConverter"
        />

  <adapter
      factory=".widgets.MyPackageFieldWidget"
      provides="z3c.form.interfaces.IFieldWidget"
      for="zope.schema.interfaces.IDict
           zope.schema.interfaces.IField
           my.package.interfaces.widget.IWidgetsLayer"
      />

  <z3c:widgetTemplate
      mode="input"
      widget="my.package.interfaces.widget.IMyPackageWidget"
      layer="my.package.interfaces.widget.IWidgetsLayer"
      template="input.pt"
      />

</configure>

摘自plone.supermodel.model.Schema架构

form.widget(member_frequencies=MyPackageFieldWidget)
mypackage_dict = schema.Dict(
    title=_(u"Member/subscription"),
    key_type=schema.TextLine(),
    value_type=schema.Choice(source=setting_options),
)

如果我创建了一个plone.directives.form.SchemaForm，我获取数据的值[＆＃39; mypackage_dict＆＃39;]看起来很好，我可以将它保存到注册表中。我希望能够使用controlpanel.RegistryEditForm类进行更多自动化，但是，如果我能理解它想要转换的内容。

Plone 4.2

用于dict字段的{z} c形式小部件

0 个答案: