Question

我正在使用第三方Django应用程序，即django-geo。其中一个模型，即LocationType，没有__unicode__方法，我想添加它。请参阅下面的当前第三方模型声明：

class LocationType(models.Model):
"""Type of the location (city, village, place, locality, neighbourhood, etc.)
This is not intended to contain anything inside it.
"""
uuid = UUIDField(auto=True, blank=False, version=1, help_text=_('unique id'), default="")
description = models.CharField(unique=True, max_length=100)
objects = LocationTypeManager()

class Meta:
    verbose_name_plural = _('Location Types')
    verbose_name = _('Location Type')
    app_label = 'geo'

def natural_key(self):
    return (self.uuid.hex, )

如您所见，上面的类没有__unicode__方法。

以下是我想要添加到我的应用程序的自定义代码：

LocationType.__unicode__ = lambda location_type: location_type.description

在普通的Django应用程序中，我将在哪里添加上面的猴子补丁代码？是在任何应用程序中，或者我可能需要创建另一个应用程序来容纳重写代码？

Answer 1

将proxy = True添加到您的班级（https://docs.djangoproject.com/en/dev/topics/db/models/#multi-table-inheritance）

class LocationType(models.Model):
"""Type of the location (city, village, place, locality, neighbourhood, etc.)
This is not intended to contain anything inside it.
"""
uuid = UUIDField(auto=True, blank=False, version=1, help_text=_('unique id'), default="")
description = models.CharField(unique=True, max_length=100)
objects = LocationTypeManager()

class Meta:
    verbose_name_plural = _('Location Types')
    verbose_name = _('Location Type')
    app_label = 'geo'

def natural_key(self):
    return (self.uuid.hex, )

class MyLocationType(LocationType):
    class Meta:
        proxy = True

    def __unicode__(self):
      return 'whatever'

如何在django中覆盖第三方库

1 个答案: