From 9ade8131a3d89035c872cb987d1df6fa15cdd8d7 Mon Sep 17 00:00:00 2001
From: Steve Boyd <emteknetnz@gmail.com>
Date: Thu, 2 May 2024 12:02:28 +1200
Subject: [PATCH] FIX Handle getting HasOneRelationFieldInterface passed as an
 array

---
 src/Forms/RequiredFields.php           |  7 +++++-
 src/Forms/SearchableDropdownField.php  |  3 ++-
 tests/php/Forms/RequiredFieldsTest.php | 33 +++++++++++++++++---------
 3 files changed, 30 insertions(+), 13 deletions(-)

diff --git a/src/Forms/RequiredFields.php b/src/Forms/RequiredFields.php
index 918a32a1121..3f0e055c0b7 100644
--- a/src/Forms/RequiredFields.php
+++ b/src/Forms/RequiredFields.php
@@ -113,7 +113,12 @@ public function php($data)
                 if ($formField instanceof FileField && isset($value['error']) && $value['error']) {
                     $error = true;
                 } else {
-                    $error = (count($value ?? [])) ? false : true;
+                    if (is_a($formField, HasOneRelationFieldInterface::class) && isset($value['value'])) {
+                        $stringValue = (string) $value['value'];
+                        $error = in_array($stringValue, ['0', '']);
+                    } else {
+                        $error = (count($value ?? [])) ? false : true;
+                    }
                 }
             } else {
                 $stringValue = (string) $value;
diff --git a/src/Forms/SearchableDropdownField.php b/src/Forms/SearchableDropdownField.php
index 901a88739ec..6d01feb8237 100644
--- a/src/Forms/SearchableDropdownField.php
+++ b/src/Forms/SearchableDropdownField.php
@@ -5,8 +5,9 @@
 use SilverStripe\Dev\Deprecation;
 use SilverStripe\Forms\DropdownField;
 use SilverStripe\ORM\DataList;
+use SilverStripe\Forms\HasOneRelationFieldInterface;
 
-class SearchableDropdownField extends DropdownField
+class SearchableDropdownField extends DropdownField implements HasOneRelationFieldInterface
 {
     use SearchableDropdownTrait;
     
diff --git a/tests/php/Forms/RequiredFieldsTest.php b/tests/php/Forms/RequiredFieldsTest.php
index 7da79eda213..afc0468513d 100644
--- a/tests/php/Forms/RequiredFieldsTest.php
+++ b/tests/php/Forms/RequiredFieldsTest.php
@@ -5,6 +5,7 @@
 use SilverStripe\Dev\SapphireTest;
 use SilverStripe\Forms\RequiredFields;
 use SilverStripe\Forms\Form;
+use SilverStripe\Forms\SearchableDropdownField;
 use SilverStripe\Forms\TreeDropdownField;
 use SilverStripe\Security\Group;
 
@@ -289,17 +290,27 @@ public function testFieldIsRequired()
         );
     }
 
-    public function testTreedropFieldValidation()
+    public function testHasOneRelationFieldInterfaceValidation()
     {
-        $form = new Form();
-        $field = new TreeDropdownField('TestField', 'TestField', Group::class);
-        $form->Fields()->push($field);
-        $validator = new RequiredFields('TestField');
-        $validator->setForm($form);
-        // blank string and '0' are fail required field validation
-        $this->assertFalse($validator->php(['TestField' => '']));
-        $this->assertFalse($validator->php(['TestField' => '0']));
-        // '1' passes required field validation
-        $this->assertTrue($validator->php(['TestField' => '1']));
+        $fieldClasses = [TreeDropdownField::class, SearchableDropdownField::class];
+        $suffixes = ['', 'ID'];
+        foreach ($fieldClasses as $fieldClass) {
+            foreach ($suffixes as $suffix) {
+                $form = new Form();
+                $param = $fieldClass === TreeDropdownField::class ? Group::class : Group::get();
+                $field = new $fieldClass('TestField' . $suffix, 'TestField', $param);
+                $form->Fields()->push($field);
+                $validator = new RequiredFields('TestField');
+                $validator->setForm($form);
+                // blank string and 0 and '0' and array with value of 0 fail required field validation
+                $this->assertFalse($validator->php(['TestField' => '']));
+                $this->assertFalse($validator->php(['TestField' => 0]));
+                $this->assertFalse($validator->php(['TestField' => '0']));
+                $this->assertFalse($validator->php(['TestField' => ['value' => 0]]));
+                $this->assertFalse($validator->php(['TestField' => ['value' => '0']]));
+                // '1' passes required field validation
+                $this->assertTrue($validator->php(['TestField' => '1']));
+            }
+        }
     }
 }