fix: do not set relationships if no includes found

lib/deserializer-utils.js

@@ -114,7 +114,8 @@ module.exports = function (jsonapi, data, opts) {
               return extractIncludes(relationshipData, ancestry);
             }))
             .then(function (includes) {
-              if (includes) { dest[keyForAttribute(key)] = includes; }
+              var filteredIncludes = includes.filter(item => Boolean(item));
+              if (filteredIncludes.length) { dest[keyForAttribute(key)] = filteredIncludes; }
             });
         } else {
           return extractIncludes(relationship.data, ancestry)
@@ -134,19 +135,24 @@ module.exports = function (jsonapi, data, opts) {
         var valueForRelationship = getValueForRelationship(relationshipData,
           included);
 
-        if (valueForRelationship && isFunction(valueForRelationship.then)) {
+        if (!valueForRelationship) {
+            return null
+        }
+
+        if (isFunction(valueForRelationship.then)) {
           return valueForRelationship.then(function (value) {
               if (relationshipData.meta) {
                   value.meta = relationshipData.meta
               }
             return value;
           });
-        } else {
-            if (relationshipData.meta) {
-                valueForRelationship.meta = relationshipData.meta
-            }
-          return valueForRelationship;
         }
+
+        if (relationshipData.meta) {
+            valueForRelationship.meta = relationshipData.meta
+        }
+
+        return valueForRelationship;
       });
   }
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@freshfx/jsonapi-serializer",
-  "version": "3.7.0",
+  "version": "3.7.1",
   "description": "A Node.js framework agnostic library for serializing your data to JSON API",
   "main": "index.js",
   "scripts": {