From d6eccc2087c74a755f7f68a9b0f6508e8f6a88d3 Mon Sep 17 00:00:00 2001
From: gzbender <gzbender74@gmail.com>
Date: Thu, 9 Aug 2018 15:54:42 +0500
Subject: [PATCH] lil-600, case insensitive auth backend

---
 apps/auth/backend.py | 21 +++++++++++++++++++++
 project/settings.py  |  1 +
 2 files changed, 22 insertions(+)
 create mode 100644 apps/auth/backend.py

diff --git a/apps/auth/backend.py b/apps/auth/backend.py
new file mode 100644
index 00000000..125f411a
--- /dev/null
+++ b/apps/auth/backend.py
@@ -0,0 +1,21 @@
+from django.contrib.auth.backends import ModelBackend
+from django.contrib.auth import get_user_model
+
+User = get_user_model()
+
+
+class CaseInsensitiveModelBackend(ModelBackend):
+
+    def authenticate(self, username=None, password=None):
+        try:
+            user = User.objects.get(**{f'{User.USERNAME_FIELD}__iexact': username})
+            if user.check_password(password):
+                return user
+        except User.DoesNotExist:
+            return None
+
+    def get_user(self, user_id):
+        try:
+            return User.objects.get(pk=user_id)
+        except User.DoesNotExist:
+            return None
diff --git a/project/settings.py b/project/settings.py
index 1aecdb8c..646c94ed 100644
--- a/project/settings.py
+++ b/project/settings.py
@@ -142,6 +142,7 @@ AUTH_PASSWORD_VALIDATORS = [
 
 AUTH_USER_MODEL = 'user.User'
 
+AUTHENTICATION_BACKENDS = ['apps.auth.backend.CaseInsensitiveModelBackend']
 
 # Internationalization
 # https://docs.djangoproject.com/en/2.0/topics/i18n/