Resolving the AttributeError in Django Admin

You're correct in your assessment. The error occurs because you've renamed a field from company_name to company (and changed its type from CharField to ForeignKey), but there are still references to the old field name in your code.

The Issue

The error message clearly indicates that your Contact model's __str__ method is trying to access the company_name attribute, which no longer exists:

AttributeError at /admin/website/contact/
'Contact' object has no attribute 'company_name'

Solution

You need to update your __str__ method in the Contact model. Since you've changed from a direct CharField to a ForeignKey relationship, you'll need to adjust how you reference the company information.

Here's how you might update your __str__ method:

PYTHONCopied
def __str__(self):
    # If you want to display the company name
    company_display = self.company.name if self.company else "No Company"
    
    # Assuming you have other fields like first_name and last_name
    return f"{self.first_name} {self.last_name} - {company_display}"

Make sure to adjust the field names according to your actual model structure. The key point is to replace any references to self.company_name with the appropriate attribute of the company ForeignKey.

Additional Considerations

1. Check for other references to company_name in your codebase, such as:

   • Admin configurations
   • Forms
   • Views
   • Templates

2. If you've made this change in a production environment, you might need to create and run a data migration to preserve the company information from the old field to the new relationship.

3. After making these changes, restart your development server to ensure all changes take effect.

This should resolve the AttributeError you're encountering in the Django admin panel.