How can I pass a User model into a form field (django)?
基本上，我需要使用用户的密码散列来通过自定义模型字段加密一些数据。看看我在这里使用的代码片段：django加密。
我试过这个：
1 2 3 4 5 6 7 8 9 10 | class MyClass(models.Model): owner = models.ForeignKey(User) product_id = EncryptedCharField(max_length=255, user_field=owner) ................................................................................. def formfield(self, **kwargs): defaults = {'max_length': self.max_length, 'user_field': self.user_field} defaults.update(kwargs) return super(EncryptedCharField, self).formfield(**defaults)) |
但是当我尝试使用用户字段时，我会得到一个foreignkey实例(当然！)：
1 2 | user_field = kwargs.get('user_field') cipher = user_field.password[:32] |
号
感谢您的帮助！
可能是这样的-重写save()方法，您可以在其中调用encrypt方法。
对于decrypt，可以使用signal post_init，因此每次从数据库实例化模型时，都会自动解密product_id字段。
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 | class MyClass(models.Model): user_field = models.ForeignKey(User) product_id = EncryptedCharField() ...other fields... def save(self): self.product_id._encrypt(product_id, self.user_field) super(MyClass,self).save() def decrypt(self): if self.product_id != None: user = self.user_field self.product_id._decrypt(user=user) def post_init_handler(sender_class, model_instance): if isinstance(model_instance, MyClass): model_instance.decrypt() from django.core.signals import post_init post_init_connect.connect(post_init_handler) obj = MyClass(user_field=request.user) #post_init will be fired but your decrypt method will have #nothing to decrypt, so it won't garble your input #you'll either have to remember not to pass value of crypted fields #with the constructor, or enforce it with either pre_init method #or carefully overriding __init__() method - #which is not recommended officially #decrypt will do real decryption work when you load object form the database obj.product_id = 'blah' obj.save() #field will be encrypted |
也许有一种更优雅的"Python"方式