Django模型继承和limit_choices_to

时间:2009-07-07 16:15:21

标签: django inheritance model admin limits

有谁能告诉我如何限制我在以下代码中继承的Page模型的选择?

class CaseStudy(Page):
    """ 
    An entry in a fancy picture flow widget for a case study page
    """
    image = models.ForeignKey(Image, limit_choices_to={'is_active': True, 'category__code':'RP'})

    def __unicode__(self):
        return u"%s" % self.title

django管理员成功限制了下拉列表中的图像选择,但我想限制页面模型中的字段(“父页面字段”),即:

class Page(models.Model):
    parent              = models.ForeignKey('self', blank=True, null=True, related_name='children')

1 个答案:

答案 0 :(得分:0)

我设法解决了这个问题 - 通过覆盖管理模型表单。我意识到这可能会收紧,但认为它可能会被用于那里的人。这是admin.py

的摘录
class CaseStudyForm(forms.ModelForm):
    def __init__(self, *args, **kwargs):
        super(CaseStudyForm, self).__init__(*args, **kwargs)

        recent_project_page = Page.objects.get(title="Recent Projects")        
        parent_widget = self.fields['parent'].widget
        choices = []
        for key, value in parent_widget.choices:
            if key in [recent_project_page.id,]:
                choices.append((key, value))
        parent_widget.choices = choices


class CaseStudyAdmin(admin.ModelAdmin):
    form = CaseStudyForm

admin.site.register(CaseStudy, CaseStudyAdmin)