formdata: add access to a form_last_update_datetime variable (#47293)

tests/test_formdata.py

@@ -148,6 +148,7 @@ def test_just_created(pub):
     assert substvars.get('form_receipt_date')
     assert substvars.get('form_receipt_time')
     assert substvars.get('form_receipt_datetime')
+    assert substvars.get('form_last_update_datetime')
     assert substvars.get('form_evolution')
 
 
@@ -651,6 +652,7 @@ def test_lazy_formdata(pub, variable_test_data):
     lazy_formdata = LazyFormData(formdata)
     assert lazy_formdata.receipt_date == time.strftime('%Y-%m-%d', formdata.receipt_time)
     assert lazy_formdata.receipt_time == time.strftime('%H:%M', formdata.receipt_time)
+    assert lazy_formdata.last_update_datetime.timetuple()[:6] == formdata.last_update_time[:6]
     assert lazy_formdata.internal_id == formdata.id
     assert lazy_formdata.name == 'foobarlazy'
     assert lazy_formdata.display_name == 'foobarlazy #%s' % formdata.get_display_id()

wcs/formdata.py

@@ -720,6 +720,8 @@ class FormData(StorableObject):
                 # both normal formdata (where receipt_time is a time.struct_time)
                 # and sql.AnyFormData where it's already a datetime object.
                 d['form_receipt_datetime'] = make_datetime(self.receipt_time)
+            if self.last_update_time:
+                d['form_last_update_datetime'] = make_datetime(self.last_update_time)
             if self.formdef.workflow.criticality_levels:
                 try:
                     level = self.get_criticality_level_object()

wcs/variables.py

@@ -323,6 +323,11 @@ class LazyFormData(LazyFormDef):
     def receipt_datetime(self):
         return make_datetime(self._formdata.receipt_time) if self._formdata.receipt_time else None
 
+    @property
+    def last_update_datetime(self):
+        last_update_time = self._formdata.last_update_time
+        return make_datetime(last_update_time) if last_update_time else None
+
     @property
     def status(self):
         return self._formdata.get_status_label()