Changed _pluck get validation

Author: dekelev

lib/common/_pluck.js

@@ -20,10 +20,9 @@ function _pluckItem (item, fieldNames) {
   const plucked = {};
 
   fieldNames.forEach(fieldName => {
-    const valueNotByDot = item[fieldName];
-    const value = valueNotByDot !== undefined ? valueNotByDot : getByDot(item, fieldName);
+    const value = fieldName in item ? item[fieldName] : getByDot(item, fieldName);
     if (value !== undefined) { // prevent setByDot creating nested empty objects
-      if (valueNotByDot !== undefined) { plucked[fieldName] = value; } else { setByDot(plucked, fieldName, value); }
+      if (fieldName in item) { plucked[fieldName] = value; } else { setByDot(plucked, fieldName, value); }
     }
   });