Django管理员字段验证返回错误不会在应用程序中引发异常

Question

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.

我试图使用以下代码,但它没有用

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？

PS正在使用django 1.4和django-hvad进行翻译,这就是为什么我从TranslatableAdmin继承

问候

Answer 1

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()

使用管理表单中的任何验证:

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)