From d57a940b650e27b8b492ca04e916fb42a9c901ac Mon Sep 17 00:00:00 2001
From: Sergei Maertens <sergei@maykinmedia.nl>
Date: Thu, 14 Mar 2024 17:01:49 +0100
Subject: [PATCH 1/2] :sparkles: [#3977] Add submission context to formio data
 serializer

So that the plugin validators can run in the context of the provided
submission and not crash.
---
 src/openforms/submissions/api/validation.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/openforms/submissions/api/validation.py b/src/openforms/submissions/api/validation.py
index 3c5775e625..5e53c64c61 100644
--- a/src/openforms/submissions/api/validation.py
+++ b/src/openforms/submissions/api/validation.py
@@ -57,7 +57,11 @@ def validate(self, attrs: dict):
             assert step.form_step
             components = step.form_step.form_definition.configuration["components"]
 
-            step_data_serializer = build_serializer(components, data=data)
+            step_data_serializer = build_serializer(
+                components,
+                data=data,
+                context={"submission": submission},
+            )
             if not step_data_serializer.is_valid():
                 errors = step_data_serializer.errors
 

From b4ccdb26e91121f221909ce833b1e4ad24618c6a Mon Sep 17 00:00:00 2001
From: Sergei Maertens <sergei@maykinmedia.nl>
Date: Fri, 15 Mar 2024 15:51:09 +0100
Subject: [PATCH 2/2] :white_check_mark: [#3977] Add end-to-end test for
 textfield plugin validation

This ensures that the plugin validators are correctly wired up.
---
 src/openforms/tests/e2e/test_input_validation.py | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/openforms/tests/e2e/test_input_validation.py b/src/openforms/tests/e2e/test_input_validation.py
index 2f83e5f85c..2e13f708b6 100644
--- a/src/openforms/tests/e2e/test_input_validation.py
+++ b/src/openforms/tests/e2e/test_input_validation.py
@@ -80,6 +80,22 @@ def test_regex_house_number_addition(self):
             expected_ui_error="Huisnummertoevoeging mag enkel alfanumerieke karaketers zijn.",
         )
 
+    def test_kvk_number_validation_plugin(self):
+        component: Component = {
+            "type": "textfield",
+            "key": "chamberOfCommerce",
+            "label": "KVK nummer",
+            "validate": {
+                "plugins": ["kvk-kvkNumber"],
+            },
+        }
+
+        self.assertValidationIsAligned(
+            component,
+            ui_input="aaaa",  # deliberate to trigger the non-network validation
+            expected_ui_error="Waarde moet numeriek zijn.",
+        )
+
 
 class SingleEmailTests(ValidationsTestCase):
     def test_required_field(self):