Issue #2833061 by tangozulu, coreykck, tanc: Exception: The host entity cannot...

Issue #2833061 by tangozulu, coreykck, tanc: Exception: The host entity cannot be changed. in FieldCollectionItemEntity->updateHostEntity()

field_collection.entity.inc

@@ -234,7 +234,15 @@ class FieldCollectionItemEntity extends Entity {
     list($recieved_id) = entity_extract_ids($this->hostEntityType, $entity);
 
     if ($this->isInUse() && !empty($this->hostEntityId)) {
-      $current_id = $this->hostEntityId;
+      if (is_array($this->hostEntityId)) {
+        $current_id = in_array(
+          $recieved_id,
+          $this->hostEntityId
+        ) ? $recieved_id : FALSE;
+      }
+      else {
+        $current_id = $this->hostEntityId;
+      }
     }
     else {
       $current_host = entity_revision_load($this->hostEntityType, $this->hostEntityRevisionId);
@@ -334,7 +342,7 @@ class FieldCollectionItemEntity extends Entity {
 
           if ($this->isInUse()) {
             $data_array_keys = array_keys($data);
-            $this->hostEntityId = $data ? end($data_array_keys) : FALSE;
+            $this->hostEntityId = $data ? $data_array_keys : FALSE;
             $this->hostEntityRevisionId = FALSE;
           }
           // If we are querying for revisions, we get the revision ID.