how to make a query for not none value in django

To make a query for a not none value in Django, you can use the isnull field lookup along with the exclude() method. Here are the steps to achieve this:

  1. Start by importing the necessary modules and models in your Django project:
from django.db.models import Q
from .models import YourModel
  1. Define your query using the exclude() method and the isnull field lookup. For example, if you want to retrieve all objects from the YourModel model where the some_field is not None, you can write:
query = YourModel.objects.exclude(some_field__isnull=True)
  1. Optionally, you can chain additional filters to your query if needed. For instance, if you want to retrieve the objects where some_field is not None and another_field is equal to a specific value, you can add another condition using the Q object:
query = query.filter(Q(another_field="specific_value"))
  1. Finally, you can execute the query and retrieve the results by calling the all() method on the query. For example:
results = query.all()

This will return a queryset containing all the objects that meet the specified conditions.

Remember to replace YourModel with the actual name of your Django model, and some_field and another_field with the respective field names in your model. Also, adjust the conditions according to your specific requirements.

I hope this explanation helps! Let me know if you have any further questions.