Fix issue when string list settings field is null. Resolves #3683.

awx/conf/fields.py

@@ -20,8 +20,14 @@ logger = logging.getLogger('awx.conf.fields')
 
 
 class StringListField(ListField):
+
     child = CharField()
 
+    def to_representation(self, value):
+        if value is None and self.allow_null:
+            return None
+        return super(StringListField, self).to_representation(value)
+
 
 class URLField(CharField):
 

awx/settings/defaults.py

@@ -473,9 +473,6 @@ SOCIAL_AUTH_SAML_TECHNICAL_CONTACT = {}
 SOCIAL_AUTH_SAML_SUPPORT_CONTACT = {}
 SOCIAL_AUTH_SAML_ENABLED_IDPS = {}
 
-SOCIAL_AUTH_ORGANIZATION_MAP = {}
-SOCIAL_AUTH_TEAM_MAP = {}
-
 # Any ANSIBLE_* settings will be passed to the subprocess environment by the
 # celery task.
 

awx/sso/conf.py

@@ -126,7 +126,8 @@ register(
 register(
     'SOCIAL_AUTH_ORGANIZATION_MAP',
     field_class=fields.SocialOrganizationMapField,
-    default={},
+    allow_null=True,
+    default=None,
     label=_('Social Auth Organization Map'),
     help_text=SOCIAL_AUTH_ORGANIZATION_MAP_HELP_TEXT,
     category=_('Authentication'),
@@ -137,7 +138,8 @@ register(
 register(
     'SOCIAL_AUTH_TEAM_MAP',
     field_class=fields.SocialTeamMapField,
-    default={},
+    allow_null=True,
+    default=None,
     label=_('Social Auth Team Map'),
     help_text=SOCIAL_AUTH_TEAM_MAP_HELP_TEXT,
     category=_('Authentication'),