Django管理员字段验证返回错误不会在应用程序中引发异常

时间:2012-09-23 08:59:41

标签: django django-admin django-hvad django-nani

我有一个Django模型,它有一个图像的上传字段,我试图在存储之前验证图像字段以检查图像大小,并返回优雅的错误消息供用户纠正。

我尝试使用以下代码,但它不起作用

admin.py

class BonanzaAdmin(TranslatableAdmin):
    list_display = ['get_bonanza_name', 'user_profile', 'publish_date', 'created_by', 'created_at', 'all_translations']

    def clean_image(self):

        image = self.cleaned_data.get('image')
        if not image:
            raise forms.ValidationError("No image!")
        else:
            w, h = get_image_dimensions(image)
            if w != 1170:
                raise forms.ValidationError("The image is %i pixel wide. It's supposed to be 1170px" % w)
            if h != 500:
                raise forms.ValidationError("The image is %i pixel high. It's supposed to be 500px" % h)
        return image 


    def save_model(self, request, obj, form, change):
        if not change:
            obj.created_by = request.user
        obj.save()

整个clean_image()没有被调用,我也尝试将名称反转为image_clean(),但也没有用。无论如何,我试图将验证移到save_model

class BonanzaAdmin(TranslatableAdmin):
    list_display = ['get_bonanza_name', 'user_profile', 'publish_date', 'created_by', 'created_at', 'all_translations']


    def save_model(self, request, obj, form, change):
        image = obj.image
        if not image:
            raise forms.ValidationError("No image!")
        else:
            w, h = get_image_dimensions(image)
            if w != 1170:
                raise forms.ValidationError("The image is %i pixel wide. It's supposed to be 1170px" % w)
            if h != 500:
                raise forms.ValidationError("The image is %i pixel high. It's supposed to be 500px" % h)
        if not change:
            obj.created_by = request.user
        obj.save()

现在第二段代码工作正常,它通过验证过程,但它没有显示简单的错误消息。相反,它会引发异常!如何让它显示错误,以便用户纠正并重试?

P.S使用django 1.4和django-hvad进行翻译,这就是为什么我要继承TranslatableAdmin

此致

2 个答案:

答案 0 :(得分:8)

正如 demalexx 所说,您应该使用其他表单来验证您的模型。

class Bonanza(models.Model):
    user_profile = models.CharField(max_length = 128)
    publish_date = models.DateField()

在您的管理表单中使用任何验证:

class BonanzaAdminForm(forms.ModelForm):
    class Meta:
        model = Bonanza
    def clean(self):
        # Validation goes here :)
        raise forms.ValidationError("TEST EXCEPTION!")

简单的自动生成管理员:

class BonanzaAdmin(admin.ModelAdmin):
    form = BonanzaAdminForm

admin.site.register(Bonanza, BonanzaAdmin)

答案 1 :(得分:1)

您继承了ModelAdmin,但它没有验证方法。相反,您应该覆盖form属性以提供自定义表单并向该表单添加验证方法。在admin:https://docs.djangoproject.com/en/1.4/ref/contrib/admin/#adding-custom-validation-to-the-admin

中有关于自定义验证的文档