correctly return empty json_documents

jsonform/gadget_json_generated_form_child.js

@@ -1411,7 +1411,7 @@
           if (input.hasAttribute('data-origin-value')) {
             json_dict[input.name] = JSON.parse(input.getAttribute('data-origin-value'));
           } else {
-            if (input.required || input.value !== "") {
+            if (input.value !== "") {
               var type = input.getAttribute('data-json-type');
               if (input.tagName === "SELECT" && input.value) {
                 // selection used for enums
@@ -1445,10 +1445,18 @@
         }
         if (count_of_values === 0) {
           switch (g.props.type) {
+          case "string":
+            return "";
+          case "number":
+            return null;
+          case "boolean":
+            return null;
+          case "array":
+            return [];
           case "object":
             return {};
           default:
-            return null;
+            return;
           }
         }
         return multi_level_dict[""];
@@ -1635,7 +1643,7 @@
         property_name = g.element.getAttribute('data-json-property-name'),
         schema = options.schema,
         root;
-      g.props.change = false;
+      g.props.changed = false;
       g.props.saveOrigValue = options.saveOrigValue;
       g.props.inputs = [];
       g.props.add_buttons = [];
@@ -1661,9 +1669,8 @@
         options.type = guessSchemaType(schema);
       }
       // used for empty document generation
-      g.props.type = getDocumentType(options.document) ||
-                     (schema && typeof schema.type === "string" && schema.type) ||
-                     options.type;
+      g.props.type = (schema && typeof schema.type === "string" && schema.type) ||
+                     options.type || getDocumentType(options.document);
       while (root.firstChild) {
         root.removeChild(root.firstChild);
       }