Django Admin实现上传图片校验功能
Django 为未来的开发人员提供了许多功能:一个成熟的标准库,一个活跃的用户社区,以及 Python 语言的所有好处。虽然其他 Web 框架也声称能提供同样的内容,但 Django 的独特之处在于它内置了管理应用程序 —— admin。
admin 提供了开箱即用的高级 Create-Read-Update-Delete (CRUD) 功能,减少了重复工作所需的时间。这是许多 Web 应用程序的关键所在,程序员可以在开发时快速浏览他们的数据库模型;非技术最终用户可以在部署时使用 admin 添加和编辑站点内容。
我的 models里有个ImageField字段,用来保存用户头像,希望通过Django Admin上传时校验头像大小,如果太大就报错,并且不保存。
网上有不少方法,有的通过第三方软件实现,有的通过自己写form验证,我觉得太复杂了,本身的要求也不高,只想要最简单的方法。
下面的方法是通过覆盖 admin.ModelAdmin 的 save_model()来校验图片大小,如果图片大于20K,就报错并且不保存:
from django.contrib import messages class YourModeAdmin(admin.ModelAdmin): ... def save_model(self, request, obj, form, change): #不保存大图片 if obj.picture and obj.picture.size > 20480: messages.set_level(request, messages.ERROR) messages.error(request, 'The picture\'s too large. It\'s supposed smaller than 20K.') else: obj.save()
最后show一下实现好的django网站,感谢 andrew liu 的在线教程:
以上内容给大家介绍了Django Admin实现上传图片校验功能的相关知识,希望对大家以上帮助!

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