Add custom validator for multiple emails in a single text field. Change the widget of the email fields in the mailer app to avoid browser side email validation. Closes GitLab issue #530. Thanks to Mark Maglana @relaxdiego for the report.

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

mayan/apps/mailer/validators.py

@@ -0,0 +1,18 @@
+from __future__ import unicode_literals
+
+from django.core import validators
+from django.utils.translation import ugettext_lazy as _
+
+from .utils import split_recipient_list
+
+
+def validate_email_multiple(value):
+    recipient_list = split_recipient_list(recipients=[value])
+
+    for recipient in recipient_list:
+        validate_email = validators.EmailValidator(
+            message=_('%(email)s is not a valid email address.') % {
+                'email': recipient
+            }
+        )
+        validate_email(value=recipient)