feat: added user_solo

projects/settings.py

@@ -51,6 +51,7 @@ INSTALLED_APPS = [
     'allauth.socialaccount',
     'recipes',
     'neapolitan',
+    'user_solo',
 ]
 
 MIDDLEWARE = [

user_solo/README.md

@@ -0,0 +1,22 @@
+# django-user-solo
+
+Proof of concept `UserSingletonModel` that creates an singleton instance for each user.
+
+Inspired by [django-solo](https://github.com/lazybird/django-solo) ❤️
+
+```python
+from user_solo.models import UserSingletonModel
+
+class Preference(UserSingletonModel):
+    flag = models.BooleanField(default=True)
+
+# All users will have .preference
+user = User.objects.get(...)
+user.preference # get_or_create
+```
+
+### TODO
+
+- Settings
+- Caching
+- Signals (create when user created)

user_solo/apps.py

@@ -0,0 +1,6 @@
+from django.apps import AppConfig
+
+
+class UserSoloConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'user_solo'

user_solo/models.py

@@ -0,0 +1,21 @@
+from django.conf import settings
+from django.core.exceptions import ObjectDoesNotExist
+from django.db import models
+from django.db.models.fields.related_descriptors import ReverseOneToOneDescriptor
+from django.db.models.fields.related import OneToOneField
+
+class UserSingletonDescriptor(ReverseOneToOneDescriptor):
+    def __get__(self, user, cls=None):
+        try:
+            return super().__get__(user, cls)
+        except ObjectDoesNotExist:
+            return self.related.related_model.objects.create(user=user)
+
+class UserSingletonField(OneToOneField):
+    related_accessor_class = UserSingletonDescriptor
+
+class UserSingletonModel(models.Model):
+    user = UserSingletonField(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
+
+    class Meta:
+        abstract = True