Merge pull request #991 from stockr-labs/feature/email-backends-generators

Fixed #20194 -- Adds generators support for email backends that do not support it.

django/core/mail/backends/console.py

@@ -16,6 +16,7 @@ class EmailBackend(BaseEmailBackend):
         """Write all messages to the stream in a thread-safe way."""
         if not email_messages:
             return
+        msg_count = 0
         with self._lock:
             try:
                 stream_created = self.open()
@@ -24,9 +25,10 @@ class EmailBackend(BaseEmailBackend):
                     self.stream.write('-' * 79)
                     self.stream.write('\n')
                     self.stream.flush()  # flush after each message
+                    msg_count += 1
                 if stream_created:
                     self.close()
             except:
                 if not self.fail_silently:
                     raise
-        return len(email_messages)
+        return msg_count

django/core/mail/backends/dummy.py

@@ -6,4 +6,4 @@ from django.core.mail.backends.base import BaseEmailBackend
 
 class EmailBackend(BaseEmailBackend):
     def send_messages(self, email_messages):
-        return len(email_messages)
+        return len(list(email_messages))

django/core/mail/backends/locmem.py

@@ -20,7 +20,9 @@ class EmailBackend(BaseEmailBackend):
 
     def send_messages(self, messages):
         """Redirect messages to the dummy outbox"""
+        msg_count = 0
         for message in messages:  # .message() triggers header validation
             message.message()
+            msg_count += 1
         mail.outbox.extend(messages)
-        return len(messages)
+        return msg_count