Fixed fallback editor used for any unsupported but JSON-compatible fields

xblockutils/public/studio_edit.js

@@ -23,6 +23,13 @@ function StudioEditableXBlockMixin(runtime, element) {
                     return parseInt(val, 10);
                 if (type == "float")
                     return parseFloat(val);
+                if (type == "generic") {
+                    val = val.trim();
+                    if (val === "")
+                        val = null;
+                    else
+                        val = JSON.parse(val); // TODO: handle parse errors
+                }
                 return val;
             }
         });
@@ -33,7 +40,7 @@ function StudioEditableXBlockMixin(runtime, element) {
         };
         $field.bind("change input paste", fieldChanged);
         $resetButton.click(function() {
-            $field.val($wrapper.data('default'));
+            $field.val($wrapper.attr('data-default')); // Use attr instead of data to force treating the default value as a string
             $wrapper.removeClass('is-set');
             $resetButton.removeClass('active').addClass('inactive');
         });

xblockutils/studio_editable.py

@@ -10,6 +10,7 @@ StudioEditableXBlockMixin to your XBlock.
 
 # Imports ###########################################################
 
+import json
 import logging
 
 from xblock.core import XBlock
@@ -106,6 +107,10 @@ class StudioEditableXBlockMixin(object):
                 break
         if "type" not in info:
             raise NotImplementedError("StudioEditableXBlockMixin currently only supports fields derived from JSONField")
+        if info["type"] == "generic":
+            # Convert value to JSON string if we're treating this field generically:
+            info["value"] = json.dumps(info["value"])
+            info["default"] = json.dumps(info["default"])
         if field.values and not isinstance(field, Boolean):
             info['has_values'] = True
             # This field has only a limited number of pre-defined options.