Coding⏱️ 2 min read📅 2026-06-03

How to Fix: Create Django model or update if exists

Retrieve existing person object by identifier if exists, otherwise create a new one.

Quick Answer: Use the get() method with a query set to retrieve an existing person object, or create a new one if it doesn't exist.

📋 Table of Contents

  1. 🔧 Proven Troubleshooting Steps
  2. 💡 Conclusion

To fix the issue of creating a model object or updating if it exists, you need to use Django's built-in methods for accessing and manipulating models.

🔧 Proven Troubleshooting Steps

Method 1: Using get_object_or_create()

  1. Step 1: Create a new instance of the Person model using the get_object_or_create() method, passing in the identifier as an argument.

Example Code:

person = Person.objects.get_object_or_create(identifier='12345')

This will create a new instance of the Person model if it does not exist, or return the existing one.

Method 2: Using select_for_update() and get_object_or_create()

  1. Step 1: Use the select_for_update() method to lock the instance for update, then use get_object_or_create() to create or retrieve the instance.

Example Code:

person = Person.objects.select_for_update().get_object_or_create(identifier='12345')

This will create a new instance of the Person model if it does not exist, or return the existing one while locking the instance for update.

💡 Conclusion

By using these methods, you can efficiently create and retrieve model objects in Django.

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