In Django applications, it’s common to perform CRUD (Create, Read, Update, Delete) operations on models. Sometimes, you may need to store model names as strings in a database table and dynamically use these names for various operations. This can be particularly useful for creating flexible and dynamic applications.

Step-by-Step Guide

1. Store Model Names in a Database Table

First, let's create a model to store the names of other models as strings.

from django.db import models

class ModelRegistry(models.Model):
    model_name = models.CharField(max_length=255)

    def __str__(self):
        return self.model_name

This ModelRegistry model will store the names of your other models.

2. Retrieve and Use the Model Dynamically

To dynamically retrieve a model class from its name stored as a string, we can use Django’s apps module.

from django.apps import apps

def get_model_instance(model_name):
    try:
        model = apps.get_model('your_app_name', model_name)
        return model
    except LookupError:
        return None