python - Plone-为什么我收到 WrongContainedType 错误？

Question

我有一个名为 IReportSettings 的接口(interface)，用于具有元组的注册表项，该元组存储使用接口(interface) IUserSetting 的 PersistantObjects，该接口(interface)由名为 UserSetting 的对象类型实现。 IUserSetting 和 UserSetting 的工厂适配器通过 registerFactoryAdapter 注册。当我尝试使用 UserSettings 元组设置注册表项的 IReportSettings 时，出现错误:

WrongContainedType: ([WrongContainedType([WrongType('uname', <type 'unicode'>,'user_name')],'')],'value')

这是我的一些代码:

class PersistentObject(PersistentField, schema.Object):
    pass

class IUserSetting(Interface):
    user_name = schema.TextLine(title=u"User",
                                required=True,
                                default=u"",
                   )

    field_a= schema.List(title=u"Field A",
                      value_type=schema.Choice(vocabulary=u'my.product.vocabularies.SomeVocabulary'),
                      required=False,
                      default=None
           )

    field_b = schema.TextLine(title=u"Field B",
                              required=False,
                              default = u"",
              )
    .
    .

class UserSetting(object):
    implements(IUserSetting)

    def __init__(self, user_name=u'', field_a=None, field_b=u'', ..):
        self.user_name = user_name
        self.field_a = field_a
        if field_a=None:
            self.field_a = []
        self.field_b = field_b
        ..

registerFactoryAdapter(IUserSetting, UserSetting)

class IReportSettings
    settings = schema.Tuple(
        title=u"User settings for a Report",
        value_type=PersistentObject(
                IUserSetting,
                title=u"User Setting",
                description=u"a Report Setting"
            ),
        required=False,
        default=(),
        missing_value=(),
    )

在表单类中:

def saveUI(self, data):
    user_name = api.user.get_current().id
    field_a = data['field_a']
    field_b = data['field_b']
    .
    .
    registry_util = queryUtility(IRegistry)
    user_settings = registry_util.forInterface(IReportSettings,check=False)
    already_exists = False
    #Iterate through user_settings.settings and check if a setting for the user already exists, update if it exists or add new if it doesn't exist

    if already_exists == False:
        #Add new UserSetting - Example Data
        new_setting = UserSetting(user_name=user_name, field_a= field_a, field_b=field_b)
        user_settings.settings += (new_setting,)

new_setting 是我打印时的正确类型。我传递的哪些数据可能是错误的？

在我的registry.xml 文件中，我添加了:

<records interface="my.package.user_settings.IReportSettings" purge="False"/>

另外，我的代码基于这篇文章: http://blog.redturtle.it/plone.app.registry-how-to-use-it-and-love-it

Answer 1

我是这篇文章的作者，但我认为您的问题与此无关。

存储在user_name中的数据必须是unicode，但调用api.user.get_current().id将(可能)返回一个8位字符串。

所以尝试将行更改为:

user_name = api.user.get_current().id.decode('utf-8')