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因此,我想将属性添加到类似于另一个模型的属性的模型中,该模型包含可翻译的字段。

我的模型:

class MyModel(models.Model):
    ... fields ...

class MyModelTranslation(models.Model):
    ... the fields I want on MyModel ...
    name = models.CharField()
    city = models.CharField()
    language = models.CharField()
    mymodel = models.ForeignKey(MyModel)

所以我写了以下__init__

class MyModel(models.Model):

    ...

    def __init__(self, *args, **kwargs):
        super(Model, self).__init__(*args, **kwargs)
        # get_translation gets the object, that holds the translation fields for the
        # current active language
        trans = lambda c: c.get_translation()

        setattr(self.__class__, 'translation', property(trans))

        fget = lambda c: getattr(trans(c), 'name')
        fset = lambda c, v: setattr(trans(c), 'name', v)
        setattr(self.__class__, 'name', property(fget, fset))

        fget = lambda c: getattr(trans(c), 'city')
        fset = lambda c, v: setattr(trans(c), 'city', v)
        setattr(self.__class__, 'city', property(fget, fset))

这完美地工作。然后当我打电话时mymodel.name,我得到mymodeltranslation.name了活动语言。也可以设置此值。

由于我希望动态生成它以便可以在 mixin 中使用它,因此我将它添加到 for 循环中,如下所示:

   def __init__(self, *args, **kwargs):
        super(Model, self).__init__(*args, **kwargs)
        trans = lambda c: c.get_translation()
        setattr(self.__class__, 'translation', property(trans))

        # returns all fields of the translation model
        trans_fields = [field.name for field in [
            related for related in self._meta.get_all_related_objects()
            if "translation" in related.name
        ][0].model._meta.fields]

        # should then assign all those fields dynamically
        for name in trans_fields:
            if not name == 'id' and not name == 'mymodel':
                fget = lambda c: getattr(trans(c), name)
                fset = lambda c, v: setattr(trans(c), name, v)
                setattr(self.__class__, name, property(fget, fset))

所以我想,好吧,因为这个name值类似于我以前手动添加的字段的名称,所以它应该在每次运行 for 循环时添加property一个名称为 的值。name但事实并非如此。当我调用mymodel.name它时,它会返回模型实例(基本上就是这样self)。当我在 forloop 中而不是全部手动执行时,我不知道有什么不同。

有任何想法吗?

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