misc: add support for live block conditions in workflow forms (#86798)

wcs/forms/common.py

@@ -916,11 +916,13 @@ class FormStatusPage(Directory, FormTemplateMixin):
                                 yield (widget.field, block_row, field_widget.field, field_widget)
                             block_row += 1
 
+        # get dictionary with blocks data, from workflow form, or defaults to formdata
+        blocks_formdata_data = getattr(form, 'blocks_formdata_data', formdata.data)
         for block, block_row, field, widget in get_all_field_widgets(form):
             t0 = time.time()
             if block:
                 try:
-                    block_data = formdata.data.get(block.id)['data'][block_row]
+                    block_data = blocks_formdata_data.get(block.id)['data'][block_row]
                 except (IndexError, TypeError):
                     block_data = {}
 

wcs/wf/form.py

@@ -326,6 +326,16 @@ class FormWorkflowStatusItem(WorkflowStatusItem):
 
         self.formdef.set_live_condition_sources(form, self.formdef.fields)
 
+        if (
+            formdata.evolution
+            and formdata.evolution[-1].parts
+            and isinstance(formdata.evolution[-1].parts[-1], WorkflowFormEvolutionPart)
+            and formdata.evolution[-1].parts[-1].live
+        ):
+            # attach live evaluated data to form object, to be used in live_process_fields
+            # for block conditions.
+            form.blocks_formdata_data = formdata.evolution[-1].parts[-1].data
+
         if form.is_submitted():
             # skip prefilling part when form is being submitted
             return
@@ -355,6 +365,7 @@ class FormWorkflowStatusItem(WorkflowStatusItem):
             formdata.evolution[-1].add_part(
                 WorkflowFormEvolutionPart(self, formdef_data, live=bool(not submit))
             )
+            form.formdata_data = formdef_data
 
     def submit_form(self, form, formdata, user, evo):
         if not self.formdef: