Add regexp validation of Schedule.name

- Legacy-Id: 17388

ietf/meeting/models.py

@@ -1,4 +1,4 @@
-# Copyright The IETF Trust 2007-2019, All Rights Reserved
+# Copyright The IETF Trust 2007-2020, All Rights Reserved
 # -*- coding: utf-8 -*-
 from __future__ import absolute_import, print_function, unicode_literals
 
@@ -14,7 +14,7 @@ import string
 
 import debug                            # pyflakes:ignore
 
-from django.core.validators import MinValueValidator
+from django.core.validators import MinValueValidator, RegexValidator
 from django.db import models
 from django.db.models import Max
 from django.conf import settings
@@ -611,7 +611,7 @@ class Schedule(models.Model):
     schedule, others may copy it
     """
     meeting  = ForeignKey(Meeting, null=True, related_name='schedule_set')
-    name     = models.CharField(max_length=16, blank=False)
+    name     = models.CharField(max_length=16, blank=False, help_text="Letters, numbers and -:_ allowed.", validators=[RegexValidator(r'^[A-Za-z0-9-:_]*$')])
     owner    = ForeignKey(Person)
     visible  = models.BooleanField(default=True, help_text="Make this agenda available to those who know about it.")
     public   = models.BooleanField(default=True, help_text="Make this agenda publically available.")