fix(teams): Better error message for invalid team slug

Author: macqueen

src/sentry/api/endpoints/organization_teams.py

@@ -4,6 +4,7 @@
 
 from django.db import IntegrityError, transaction
 from django.db.models import Q
+from django.utils.translation import ugettext_lazy as _
 from rest_framework import serializers, status
 from rest_framework.response import Response
 
@@ -46,7 +47,15 @@ def __init__(self):
 
 class TeamSerializer(serializers.Serializer):
     name = serializers.CharField(max_length=64, required=False)
-    slug = serializers.RegexField(r'^[a-z0-9_\-]+$', max_length=50, required=False)
+    slug = serializers.RegexField(
+        r'^[a-z0-9_\-]+$',
+        max_length=50,
+        required=False,
+        error_messages={
+            'invalid': _('Enter a valid slug consisting of lowercase letters, '
+                         'numbers, underscores or hyphens.'),
+        },
+    )
 
     def validate(self, attrs):
         if not (attrs.get('name') or attrs.get('slug')):
@@ -109,8 +118,8 @@ def post(self, request, organization):
 
         :pparam string organization_slug: the slug of the organization the
                                           team should be created for.
-        :param string name: the name of the organization.
-        :param string slug: the optional slug for this organization.  If
+        :param string name: the optional name of the team.
+        :param string slug: the optional slug for this team.  If
                             not provided it will be auto generated from the
                             name.
         :auth: required

src/sentry/static/sentry/app/components/createTeam/createTeamForm.jsx

@@ -44,7 +44,7 @@ export default class CreateTeamForm extends React.Component {
               name="slug"
               label={t('Team Slug')}
               placeholder={t('e.g. operations, web-frontend, desktop')}
-              help={t('May contain letters, numbers, dashes and underscores.')}
+              help={t('May contain lowercase letters, numbers, dashes and underscores.')}
               required
               flexibleControlStateSize
               inline={false}