标签: 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() …