django_swapper_swappable_model_definition_and_runtime_loading.py

1import swapper
2from django.db import models
3
4# 1. Define the base/abstract model in your library (e.g., 'myapp/models.py')
5class BasePost(models.Model):
6    title = models.CharField(max_length=255)
7    body = models.TextField()
8
9    class Meta:
10        abstract = True
11
12# 2. Define the default implementation
13class Post(BasePost):
14    class Meta:
15        # Use swapper to mark this model as swappable
16        # This tells Django this model can be replaced via settings
17        swappable = swapper.swappable_setting('myapp', 'Post')
18
19# 3. How to use the model in your code (e.g., in a View or Manager)
20# This will return either the default 'myapp.Post' or the custom class
21# defined by the user in settings.MYAPP_POST_MODEL
22PostModel = swapper.load_model("myapp", "Post")
23
24# Example usage of the loaded model
25def get_all_posts():
26    return PostModel.objects.all()