feat: Set default html_template_name in EmailBackend

nopassword/backends/email.py

@@ -1,13 +1,14 @@
 # -*- coding: utf-8 -*-
 from django.core.mail import EmailMultiAlternatives
+from django.template.exceptions import TemplateDoesNotExist
 from django.template.loader import render_to_string
 
 from nopassword.backends.base import NoPasswordBackend
 
 
 class EmailBackend(NoPasswordBackend):
     template_name = 'registration/login_code_request_email.txt'
-    html_template_name = None
+    html_template_name = 'registration/login_code_request_email.html'
     subject_template_name = 'registration/login_code_request_subject.txt'
     from_email = None
 
@@ -20,8 +21,10 @@ def send_login_code(self, code, context, **kwargs):
 
         email_message = EmailMultiAlternatives(subject, body, self.from_email, [to_email])
 
-        if self.html_template_name is not None:
+        try:
             html_email = render_to_string(self.html_template_name, context)
             email_message.attach_alternative(html_email, 'text/html')
+        except TemplateDoesNotExist:
+            pass
 
         email_message.send()

tests/test_backends.py

@@ -63,7 +63,8 @@ def test_email_backend(self):
         self.assertEqual(0, len(message.alternatives))
 
     def test_html_template_name(self):
-        self.backend.html_template_name = 'registration/login_code_request_email.html'
+        # We don't have an existing html template, so we just use the txt template
+        self.backend.html_template_name = 'registration/login_code_request_email.txt'
         self.backend.send_login_code(self.code, {'url': 'https://example.com'})
         self.assertEqual(1, len(mail.outbox))
         message = mail.outbox[0]