Fix get form state (#236)

Author: vsakkasld

pyproject.toml

@@ -28,7 +28,7 @@ exclude = ["tests*", "docs*"]
 
 [project]
 name = "wagtailstreamforms"
-version = "5.2.0"
+version = "5.2.1"
 description = ""
 authors = [{ name = "Lab Digital BV", email = "info@labdigital.nl" }]
 dependencies = [

wagtailstreamforms/blocks.py

@@ -27,7 +27,11 @@ def widget(self):
         return WagtailStreamFormsChooser()
 
     def get_form_state(self, value: dict):
-        return self.widget.get_value_data(value)
+        try:
+            prep_value = self.get_prep_value(value)
+            return self.widget.get_value_data(prep_value)
+        except Exception:
+            return self.widget.get_value_data(value)
 
 
 class WagtailFormBlock(blocks.StructBlock):