bring back meta choice options lost in upgrade

* status and launch_type OPTIONS choices were lost in the django + drf
upgrade. This brings them back.

awx/api/metadata.py

@@ -4,6 +4,7 @@
 # Django
 from django.core.exceptions import PermissionDenied
 from django.http import Http404
+from django.utils.encoding import force_text
 
 # Django REST Framework
 from rest_framework import exceptions
@@ -17,8 +18,28 @@ from awx.main.models import InventorySource
 
 class Metadata(metadata.SimpleMetadata):
 
+    # DRF 3.3 doesn't render choices for read-only fields
+    #
+    # We want to render choices for read-only fields
+    #
+    # Note: This works in conjuction with logic in serializers.py that sets
+    # field property editable=True before calling DRF build_standard_field()
+    # Note: Consider expanding this rendering for more than just choices fields
+    def _render_read_only_choices(self, field, field_info):
+        if field_info.get('read_only') and hasattr(field, 'choices'):
+            field_info['choices'] = [
+                {
+                    'value': choice_value,
+                    'display_name': force_text(choice_name, strings_only=True)
+                }
+                for choice_value, choice_name in field.choices.items()
+            ]
+        return field_info
+
     def get_field_info(self, field):
         field_info = super(Metadata, self).get_field_info(field)
+        if hasattr(field, 'choices') and field.choices:
+            field_info = self._render_read_only_choices(field, field_info)
 
         # Indicate if a field has a default value.
         # FIXME: Still isn't showing all default values?

awx/api/serializers.py

@@ -331,7 +331,22 @@ class BaseSerializer(serializers.ModelSerializer):
             return obj.active
 
     def build_standard_field(self, field_name, model_field):
+
+        # DRF 3.3 serializers.py::build_standard_field() -> utils/field_mapping.py::get_field_kwargs() short circuits
+        # when a Model's editable field is set to False. The short circuit skips choice rendering.
+        #
+        # This logic is to force rendering choice's on an uneditable field.
+        # Note: Consider expanding this rendering for more than just choices fields
+        # Note: This logic works in conjuction with 
+        if hasattr(model_field, 'choices') and model_field.choices:
+            was_editable = model_field.editable
+            model_field.editable = True
+
         field_class, field_kwargs = super(BaseSerializer, self).build_standard_field(field_name, model_field)
+        if hasattr(model_field, 'choices') and model_field.choices:
+            model_field.editable = was_editable
+            if was_editable is False:
+                field_kwargs['read_only'] = True
 
         # Update help text for common fields.
         opts = self.Meta.model._meta.concrete_model._meta

awx/main/tests/functional/api/test_unified_jobs_view.py

@@ -0,0 +1,17 @@
+import pytest
+
+from awx.main.models import UnifiedJob
+from django.core.urlresolvers import reverse
+
+@pytest.mark.django_db
+def test_options_fields_choices(instance, options, user):
+
+    url = reverse('api:unified_job_list')
+    response = options(url, None, user('admin', True))
+
+    assert 'launch_type' in response.data['actions']['GET']
+    assert 'choice' == response.data['actions']['GET']['launch_type']['type']
+    assert UnifiedJob.LAUNCH_TYPE_CHOICES == response.data['actions']['GET']['launch_type']['choices']
+    assert 'choice' == response.data['actions']['GET']['status']['type']
+    assert UnifiedJob.STATUS_CHOICES == response.data['actions']['GET']['status']['choices']
+