Show warning when trying to send email to zero recipients

2 files changed, 6 insertions, 0 deletions

diff --git a/pgcommitfest/commitfest/templatetags/commitfest.py b/pgcommitfest/commitfest/templatetags/commitfest.py
index ae5af0c..07b5ea4 100644
--- a/pgcommitfest/commitfest/templatetags/commitfest.py
+++ b/pgcommitfest/commitfest/templatetags/commitfest.py
@@ -24,6 +24,8 @@ def field_class(value, arg):
 def alertmap(value):
 	if value == 'error':
 		return 'alert-danger'
+	elif value == 'warning':
+		return 'alert-warning'
 	elif value == 'success':
 		return 'alert-success'
 	else:
diff --git a/pgcommitfest/commitfest/views.py b/pgcommitfest/commitfest/views.py
index 2556cc3..f34fd54 100644
--- a/pgcommitfest/commitfest/views.py
+++ b/pgcommitfest/commitfest/views.py
@@ -456,6 +456,10 @@ def send_email(request, cfid):
 	else:
 		reviewers = []
 
+	if len(authors)==0 and len(reviewers)==0:
+		messages.add_message(request, messages.WARNING, "No recipients specified, cannot send email")
+		return HttpResponseRedirect('..')
+
 	messages.add_message(request, messages.INFO, "Email will be sent from: %s" % request.user.email)
 	def _user_and_mail(u):
 		return "%s %s (%s)" % (u.first_name, u.last_name, u.email)