🐛 [#4884] Ensure that no form variables are created for soft required…

… errors

The soft required errors component should have the same behaviour like
the content component, as it holds no submission values and is purely
client-side behaviour.

Formio itself excludes the content component when looping over a
configuration with eachComponent, so we need to add this same logic
to our own code since Formio is not aware of our custom component
semantics.

In the backend, we extend the behaviour for content components to the
softRequiredErrors component to ensure no variables are created in
the database either.

src/openforms/forms/models/form_variable.py

@@ -60,7 +60,7 @@ def create_for_formstep(self, form_step: "FormStep") -> list["FormVariable"]:
         ):
             if (
                 is_layout_component(component)
-                or component["type"] == "content"
+                or component["type"] in ("content", "softRequiredErrors")
                 or component["key"] in existing_form_variables_keys
                 or component_in_editgrid(form_definition_configuration, component)
             ):

src/openforms/js/components/admin/form_design/variables/utils.js

@@ -60,6 +60,9 @@ const makeNewVariableFromComponent = (component, formDefinition) => {
 const shouldNotUpdateVariables = (newComponent, oldComponent, mutationType, stepConfiguration) => {
   // Issue #1695: content components are not considered layout components
   if (newComponent.type === 'content') return true;
+  // Issue #4884 - soft required errors are pretty much the same as content components,
+  // with additional special client-side behaviour
+  if (newComponent.type === 'softRequiredErrors') return true;
 
   const isLayout = FormioUtils.isLayoutComponent(newComponent);
 
@@ -84,9 +87,10 @@ const shouldNotUpdateVariables = (newComponent, oldComponent, mutationType, step
 const getFormVariables = (formDefinition, configuration) => {
   const newFormVariables = [];
 
-  FormioUtils.eachComponent(configuration.components, component =>
-    newFormVariables.push(makeNewVariableFromComponent(component, formDefinition))
-  );
+  FormioUtils.eachComponent(configuration.components, component => {
+    if (component.type === 'softRequiredErrors') return;
+    newFormVariables.push(makeNewVariableFromComponent(component, formDefinition));
+  });
   return newFormVariables;
 };