set default extra field values on initialisation

Author: ryanjohndunne

userdefinedfields/fields.py

@@ -11,10 +11,19 @@
 
 class ExtraFieldsJSONField(JSONField):
     def __init__(self, *args, **kwargs):
-        kwargs["default"] = dict
+        kwargs["default"] = self.get_default
         kwargs["blank"] = True
         super().__init__(*args, **kwargs)
 
+    def get_default(self):
+        ct = ContentType.objects.get_for_model(self.model)
+        relevant_fields = dict(
+            ExtraField.objects.filter(content_type=ct, default__isnull=False)
+            .exclude(default="")
+            .values_list("name", "default")
+        )
+        return relevant_fields
+
     def _get_EXTRAFIELD_fieldlist(self, obj, field, use_cache=False):
 
         # grab the relevant extrafields for this content type