Tried to update field with a model instance, <SimpleLazyObject:<<>>. Use a value comp-CodePudding

I am trying to over ride the save method in my model to store the currently loged in user. I am using the django-current user to get the authenticated user. I wrote this code

from django_currentuser.middleware import (
    get_current_user, get_current_authenticated_user)

from django_currentuser.db.models import CurrentUserField

 uploaded_by = models.CharField(max_length=255, blank=True, null=True, editable=False)

 def save(self, *args, **kwargs):

     user = get_current_authenticated_user()

     self.uploaded_by = user

     super(Citation, self).save(*args, **kwargs)

But I am getting this error

Tried to update field professional.Citation.uploaded_by with a model instance, <SimpleLazyObject: <CustomUser: [email protected]>>. Use a value compatible with CharField.

What should I do? I want to store the currently logged in user in the model save method and also keep this field non editable.

I am getting this error only when the field is being updated. It is working fine wile saving for the first time

CodePudding user response：

Your are getting this error because you are trying to save user object in an char field. Your uploaded_by filed is an CharField. You can save only string value in this fields.

try this and hope this will solved your problems:

 from django.contrib.auth.models import User #import user model
 # add user ForeignKey fields in your model
 user = models.ForeignKey(User,on_delete=models.CASCADE) 
 uploaded_by = models.CharField(max_length=255, blank=True, null=True, editable=False)
   

    def save(self, *args, **kwargs):
    
         user = self.user.username

         if not self.uploaded_by:
             self.uploaded_by = user
    
         super(Citation, self).save(*args, **kwargs)

CodePudding user response：

This is how I overcame the error

def save(self, *args, **kwargs):

        current_user = get_current_authenticated_user()
        
        user =CustomUser.objects.get(email = current_user)

        self.uploaded_by = user.email

        super(Citation, self).save(*args, **kwargs)

Here I am getting the user before directly saving it using get_current_authenticated_user() and then I am storing the user name (in my case email).