Depend on a serializer context variable no_truncate

to decide whether to turn off the ANSI control sequence-aware
truncation, instead of needing inappropriate awareness of the details
of the view that invoked the serializer.  This will also allow us to
have views that can more flexibly turn off the truncation under other
circumstances.

awx/api/serializers.py

@@ -3852,12 +3852,12 @@ class JobEventSerializer(BaseSerializer):
 
     def to_representation(self, obj):
         data = super(JobEventSerializer, self).to_representation(obj)
-        # Show full stdout for event detail view, truncate only for list view.
-        if hasattr(self.context.get('view', None), 'retrieve'):
-            return data
         # Show full stdout for playbook_on_* events.
         if obj and obj.event.startswith('playbook_on'):
             return data
+        # If the view logic says to not trunctate (request was to the detail view or a param was used)
+        if self.context.get('no_truncate', False):
+            return data
         max_bytes = settings.EVENT_STDOUT_MAX_BYTES_DISPLAY
         if 'stdout' in data:
             data['stdout'] = truncate_stdout(data['stdout'], max_bytes)
@@ -3957,8 +3957,8 @@ class AdHocCommandEventSerializer(BaseSerializer):
 
     def to_representation(self, obj):
         data = super(AdHocCommandEventSerializer, self).to_representation(obj)
-        # Show full stdout for event detail view, truncate only for list view.
-        if hasattr(self.context.get('view', None), 'retrieve'):
+        # If the view logic says to not trunctate (request was to the detail view or a param was used)
+        if self.context.get('no_truncate', False):
             return data
         max_bytes = settings.EVENT_STDOUT_MAX_BYTES_DISPLAY
         if 'stdout' in data:

awx/api/views/__init__.py

@@ -3774,6 +3774,11 @@ class JobEventDetail(RetrieveAPIView):
     model = models.JobEvent
     serializer_class = serializers.JobEventSerializer
 
+    def get_serializer_context(self):
+        context = super().get_serializer_context()
+        context.update(no_truncate=True)
+        return context
+
 
 class JobEventChildrenList(SubListAPIView):
 
@@ -4008,6 +4013,11 @@ class AdHocCommandEventDetail(RetrieveAPIView):
     model = models.AdHocCommandEvent
     serializer_class = serializers.AdHocCommandEventSerializer
 
+    def get_serializer_context(self):
+        context = super().get_serializer_context()
+        context.update(no_truncate=True)
+        return context
+
 
 class BaseAdHocCommandEventsList(SubListAPIView):