diff --git a/crnk-core/src/main/java/io/crnk/core/boot/CrnkBoot.java b/crnk-core/src/main/java/io/crnk/core/boot/CrnkBoot.java
index 7b1ff3c97..a35f069d5 100644
--- a/crnk-core/src/main/java/io/crnk/core/boot/CrnkBoot.java
+++ b/crnk-core/src/main/java/io/crnk/core/boot/CrnkBoot.java
@@ -240,6 +240,7 @@ private List<String> toSimpleNames(List<?> implementations) {
 	private void setupRepositories(ResourceRegistryPart rootPart) {
 		for (RegistryEntry entry : moduleRegistry.getRegistryEntries()) {
 			rootPart.addEntry(entry);
+			entry.getResourceInformation().initNesting();
 		}
 	}
 
diff --git a/crnk-core/src/main/java/io/crnk/core/engine/information/resource/ResourceInformation.java b/crnk-core/src/main/java/io/crnk/core/engine/information/resource/ResourceInformation.java
index ec8e78d55..0353bc59b 100644
--- a/crnk-core/src/main/java/io/crnk/core/engine/information/resource/ResourceInformation.java
+++ b/crnk-core/src/main/java/io/crnk/core/engine/information/resource/ResourceInformation.java
@@ -273,6 +273,9 @@ private boolean setupManyNesting() {
                         parentAttribute.getName(), implementationClass);
 
                 ((ResourceFieldImpl) parentField).setIdField(parentAttribute.getName(), parentAttribute.getImplementationClass(), parentIdAccessor);
+                if(null == ((ResourceFieldImpl)parentField).getOppositeName() && shouldBeNested()) {
+					((ResourceFieldImpl)parentField).setOppositeName(resourcePath);
+				}
             }
 
             return true;
diff --git a/crnk-core/src/main/java/io/crnk/core/engine/internal/dispatcher/controller/FieldResourcePost.java b/crnk-core/src/main/java/io/crnk/core/engine/internal/dispatcher/controller/FieldResourcePost.java
index b1912c4fb..2ebe8dda4 100644
--- a/crnk-core/src/main/java/io/crnk/core/engine/internal/dispatcher/controller/FieldResourcePost.java
+++ b/crnk-core/src/main/java/io/crnk/core/engine/internal/dispatcher/controller/FieldResourcePost.java
@@ -56,7 +56,6 @@ public Result<Response> handleAsync(JsonPath jsonPath, QueryAdapter queryAdapter
 		RegistryEntry bodyRegistryEntry = resourceRegistry.getEntry(resourceBody.getType());
 		ResourceInformation bodyResourceInformation = bodyRegistryEntry.getResourceInformation();
 
-
 		Serializable id = jsonPath.getId();
 		ResourceField relationshipField = fieldPath.getField();
 
@@ -69,13 +68,13 @@ public Result<Response> handleAsync(JsonPath jsonPath, QueryAdapter queryAdapter
 		DocumentMapper documentMapper = context.getDocumentMapper();
 
 		QueryContext queryContext = queryAdapter.getQueryContext();
-		Object entity = buildNewResource(relationshipRegistryEntry, resourceBody, relationshipResourceType);
+		Object entity = buildNewResource(bodyRegistryEntry, resourceBody, relationshipResourceType);
 
-		setId(resourceBody, entity, relationshipResourceInformation);
+		setId(resourceBody, entity, bodyResourceInformation);
 		setType(resourceBody, entity);
-		setAttributes(resourceBody, entity, relationshipResourceInformation, queryContext);
-		setMeta(resourceBody, entity, relationshipResourceInformation);
-		setLinks(resourceBody, entity, relationshipResourceInformation);
+		setAttributes(resourceBody, entity, bodyResourceInformation, queryContext);
+		setMeta(resourceBody, entity, bodyResourceInformation);
+		setLinks(resourceBody, entity, bodyResourceInformation);
 
 		Result<JsonApiResponse> createdResource = setRelationsAsync(entity, bodyRegistryEntry, resourceBody, queryAdapter, false)
 				.merge(it -> resourceRepository.create(entity, queryAdapter));
diff --git a/crnk-core/src/main/java/io/crnk/core/engine/internal/dispatcher/controller/ResourceUpsert.java b/crnk-core/src/main/java/io/crnk/core/engine/internal/dispatcher/controller/ResourceUpsert.java
index 41865e53e..2a8606317 100644
--- a/crnk-core/src/main/java/io/crnk/core/engine/internal/dispatcher/controller/ResourceUpsert.java
+++ b/crnk-core/src/main/java/io/crnk/core/engine/internal/dispatcher/controller/ResourceUpsert.java
@@ -210,12 +210,10 @@ protected boolean checkAccess() {
 
 
 	Object buildNewResource(RegistryEntry registryEntry, Resource dataBody, String resourceName) {
+		RegistryEntry relationshipRegistryEntry = context.getResourceRegistry().getEntry(resourceName);
+		
 		PreconditionUtil.verify(dataBody != null, "No data field in the body.");
-		PreconditionUtil.verify(resourceName.equals(dataBody.getType()),
-				"Inconsistent type definition between path and body: body type: " +
-						"%s, request type: %s",
-				dataBody.getType(),
-				resourceName);
+		verifyTypes(HttpMethod.POST, relationshipRegistryEntry, registryEntry);
 
 		ResourceInstanceBuilder<Object> instanceBuilder = registryEntry.getResourceInformation().getInstanceBuilder();
 		Object entity = instanceBuilder.buildResource(dataBody);