diff --git a/service/grails-app/views/internalCombinationPiece/_internalCombinationPiece.gson b/service/grails-app/views/internalCombinationPiece/_internalCombinationPiece.gson
index 2fb6aa9..6161190 100644
--- a/service/grails-app/views/internalCombinationPiece/_internalCombinationPiece.gson
+++ b/service/grails-app/views/internalCombinationPiece/_internalCombinationPiece.gson
@@ -8,4 +8,6 @@ def should_expand = [
 ]
 
 @Field InternalCombinationPiece internalCombinationPiece
-json g.render(internalCombinationPiece, [excludes: ['owner'], expand: should_expand])
+json g.render(internalCombinationPiece, [excludes: ['owner'], expand: should_expand]){
+  'class' internalCombinationPiece.class.name
+}
diff --git a/service/grails-app/views/internalOmissionPiece/_internalOmissionPiece.gson b/service/grails-app/views/internalOmissionPiece/_internalOmissionPiece.gson
index fc8e82b..90826e1 100644
--- a/service/grails-app/views/internalOmissionPiece/_internalOmissionPiece.gson
+++ b/service/grails-app/views/internalOmissionPiece/_internalOmissionPiece.gson
@@ -7,4 +7,6 @@ def should_expand = [
 ]
 
 @Field InternalOmissionPiece internalOmissionPiece
-json g.render(internalOmissionPiece, [expand: should_expand])
+json g.render(internalOmissionPiece, [excludes: ['owner'], expand: should_expand]){
+  'class' internalOmissionPiece.class.name
+}
diff --git a/service/grails-app/views/internalPiece/_internalPiece.gson b/service/grails-app/views/internalPiece/_internalPiece.gson
index bddac57..0fb9d84 100644
--- a/service/grails-app/views/internalPiece/_internalPiece.gson
+++ b/service/grails-app/views/internalPiece/_internalPiece.gson
@@ -1,8 +1,23 @@
 import groovy.transform.*
 import org.olf.internalPiece.InternalPiece
 import groovy.transform.Field
+import org.grails.orm.hibernate.cfg.GrailsHibernateUtil
 
 def should_expand = ['receivingPieces', 'templateMetadata']
 
 @Field InternalPiece internalPiece
-json g.render(internalPiece, [expand: should_expand])
+internalPiece = GrailsHibernateUtil.unwrapIfProxy(internalPiece) as InternalPiece
+
+switch(internalPiece.class.name){
+  case 'org.olf.internalPiece.InternalOmissionPiece':
+    json g.render (template: '/internalOmissionPiece/internalOmissionPiece', model: [internalOmissionPiece: binding.variables.internalPiece])
+    break;
+  case 'org.olf.internalPiece.InternalRecurrencePiece':
+    json g.render (template: '/internalRecurrencePiece/internalRecurrencePiece', model: [internalRecurrencePiece: binding.variables.internalPiece])
+    break;
+  case 'org.olf.internalPiece.InternalCombinationPiece':
+    json g.render (template: '/internalCombinationPiece/internalCombinationPiece', model: [internalCombinationPiece: binding.variables.internalPiece])
+    break;
+  default:
+    throw new RuntimeException("Unexpected internalPiece class ${internalPiece.class.name}")
+}
diff --git a/service/grails-app/views/internalRecurrencePiece/_internalRecurrencePiece.gson b/service/grails-app/views/internalRecurrencePiece/_internalRecurrencePiece.gson
index 4b0a6d8..60446ca 100644
--- a/service/grails-app/views/internalRecurrencePiece/_internalRecurrencePiece.gson
+++ b/service/grails-app/views/internalRecurrencePiece/_internalRecurrencePiece.gson
@@ -7,4 +7,6 @@ def should_expand = [
 ]
 
 @Field InternalRecurrencePiece internalRecurrencePiece
-json g.render(internalRecurrencePiece, [excludes: ['owner'], expand: should_expand])
+json g.render(internalRecurrencePiece, [excludes: ['owner'], expand: should_expand]){
+  'class' internalRecurrencePiece.class.name
+}