updated apps.lyric.views for simpler login authentication and error messaging; .tests.test_views have new test method to assert either authentication condition has properly occurred

src/apps/lyric/tests/test_views.py

@@ -70,3 +70,14 @@ class LoginViewTest(TestCase):
         user = auth.get_user(self.client)
         self.assertEqual(user.is_authenticated, True)
         self.assertEqual(user.email, "discoman@example.com")
+
+    def test_shows_login_error_if_token_invalid(self):
+        response = self.client.get("/apps/lyric/login?token=invalid-token", follow=True)
+        user = auth.get_user(self.client)
+        self.assertEqual(user.is_authenticated, False)
+        message = list(response.context["messages"])[0]
+        self.assertEqual(
+            message.message,
+            "Invalid login link!—please request a new one",
+        )
+        self.assertEqual(message.tags, "error")

src/apps/lyric/views.py

@@ -1,10 +1,8 @@
 from django.contrib import auth, messages
-from django.core.exceptions import ValidationError
 from django.core.mail import send_mail
 from django.shortcuts import redirect
 from django.urls import reverse
-from .models import Token, User
-from ..dashboard.forms import ItemForm
+from .models import Token
 
 def send_login_email(request):
     email = request.POST["email"]
@@ -27,12 +25,10 @@ def send_login_email(request):
 
 def login(request):
     uid = request.GET.get("token")
-    if not uid:
-        return redirect("/")
-    
     user = auth.authenticate(request, uid=uid)
     if user is not None:
         user.backend = "apps.lyric.authentication.PasswordlessAuthenticationBackend"
         auth.login(request, user)
-        
+    else:
+        messages.error(request, "Invalid login link!—please request a new one")    
     return redirect("/")