Django：list_display() 外键

Question

现在我可以在使用 Click_Data 模型时使用 list_display() 来显示列词和click_times。代码如下：

# models.py
class Click_Data(models.Model):
    word = models.CharField(max_length=255)
    click_times = models.IntegerField(default=0)

    class Meta:
        ordering = ('word',)

    def __unicode__(self):
        return self.word  

# admin.py
    class Click_DataAdmin(admin.ModelAdmin):
        fieldsets = [
            ('Word',    {'fields': ['word']}),
            ('Number',  {'fields': ['click_times']}),
        ]
        list_display = ('word', 'click_times')

但是我不知道在使用User_Data 模型（如下）时如何使用 list_display( ) 来显示列词和click_times。

# models.py
class User_Data(models.Model):
    user = models.ForeignKey(User)
    click_data = models.ForeignKey(Click_Data)

    class Meta:
        ordering = ('user',)

    def __unicode__(self):
        return unicode(self.user)

# admin.py
class User_DataAdmin(admin.ModelAdmin):
    fieldsets = [
        ('User',    {'fields': ['user']}),
        ('Word',    {'fields': ['click_data']}),
    ]
    list_display = ('user', 'click_data')

我想说明的不仅是“字”中'click_data'也“click_times”，我怎么能做到这一点？

Answer 1

尝试这个：

class User_DataAdmin(admin.ModelAdmin):
    ...
    list_display = (..., 'get_click_times', 'get_word')

    def get_click_times(self, obj):
        return obj.click_data.click_times

    get_click_times.short_description = 'Click Times'

    def get_word(self, obj):
        return obj.click_data.word

    get_word.short_description = 'Word'