Small update to cope with empty attributes not to persist n DynamoDB

cloud/lambda-jsonapi-test.js

@@ -169,7 +169,9 @@ function generateRowId(subid) {
       };
       // Adding attributes as column in dynamoDb
       for (var prop in attrs) {
-          content[prop] = attrs[prop];
+          if (attrs[prop] != null && attrs[prop].length>0)
+            // Empty field cannot be persisted
+             content[prop] = attrs[prop];
       }
       // Dealing with relationships if any
       if (relations){

cloud/lambda/lambda-jsonapi.js

@@ -160,7 +160,9 @@ function generateRowId(subid) {
       };
       // Adding attributes as column in dynamoDb
       for (var prop in attrs) {
-          content[prop] = attrs[prop];
+        if (attrs[prop] != null && attrs[prop].length>0)
+            // Empty field cannot be persisted
+            content[prop] = attrs[prop];
       }
       // Dealing with relationships if any
       if (relations){