getContent use empty string "" value only for required fields

gadget_json_generated_form_child.js

@@ -980,6 +980,7 @@
 
   function getFormValuesAsJSONDict(g) {
     var multi_level_dict = {"": {}},
+      count_of_values = 0,
       scope,
       options = g.props,
       array,
@@ -998,6 +999,7 @@
         if (ii === key_list.length - 1) {
           if (value !== undefined) {
             d[kk] = value;
+            count_of_values += 1;
           } else {
             return d[kk];
           }
@@ -1019,6 +1021,9 @@
           return gadget.getContent();
         })
         .push(function (jdict) {
+          if (jdict === undefined) {
+            return;
+          }
           convertOnMultiLevel(multi_level_dict, path, jdict);
         });
     }
@@ -1032,6 +1037,9 @@
           return gadget.getContent();
         })
         .push(function (jdict) {
+          if (jdict === undefined) {
+            return;
+          }
           var arr = convertOnMultiLevel(multi_level_dict, parent_path);
           if (!(arr instanceof Array)) {
             arr = [];
@@ -1077,7 +1085,7 @@
         var json_dict = {},
           k;
         g.props.inputs.forEach(function (input) {
-          if (input.name === "" || input.value !== "") {
+          if (input.required || input.value !== "") {
             if (input.type === 'number') {
               json_dict[input.name] = parseInt(input.value, 10);
             } else if (input.value === "true") {
@@ -1100,6 +1108,9 @@
             convertOnMultiLevel(multi_level_dict, k, json_dict[k]);
           }
         }
+        if (count_of_values === 0) {
+          return;
+        }
         return multi_level_dict[""];
       });
   }