From 06d5ba176eb1d661f15e9ee5dc203f19eb0ae45c Mon Sep 17 00:00:00 2001
From: Jason Varga <jason@pixelfear.com>
Date: Thu, 8 Dec 2022 17:37:49 -0500
Subject: [PATCH 1/2] Ensure there's hidden field for the checkboxes fieldtype

---
 resources/views/extend/forms/fields/checkboxes.antlers.html | 1 +
 tests/Tags/Concerns/RendersFormsTest.php                    | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/resources/views/extend/forms/fields/checkboxes.antlers.html b/resources/views/extend/forms/fields/checkboxes.antlers.html
index 909a9e76ccf..d709da4eadf 100644
--- a/resources/views/extend/forms/fields/checkboxes.antlers.html
+++ b/resources/views/extend/forms/fields/checkboxes.antlers.html
@@ -1,3 +1,4 @@
+<input type="hidden" name="{{ handle }}[]">
 {{ foreach:options as="option|label" }}
     <label>
         <input
diff --git a/tests/Tags/Concerns/RendersFormsTest.php b/tests/Tags/Concerns/RendersFormsTest.php
index 0354ee8c9cc..07633dc0b86 100644
--- a/tests/Tags/Concerns/RendersFormsTest.php
+++ b/tests/Tags/Concerns/RendersFormsTest.php
@@ -354,6 +354,8 @@ public function renders_checkboxes_fields($value, $default, $old, $expected)
             ],
         ]);
 
+        $this->assertStringContainsString('<input type="hidden" name="test[]">', $rendered['field']);
+
         if ($expected) {
             $unexpected = array_diff(array_keys($options), $expected);
             foreach ($expected as $e) {
@@ -379,18 +381,22 @@ public function renderMultipleSelectProvider()
             'no value, no default, missing' => ['value' => null, 'default' => null, 'old' => self::MISSING, 'expectedValue' => null],
             'no value, no default, selected' => ['value' => null, 'default' => null, 'old' => ['alfa'], 'expectedValue' => ['alfa']],
             'no value, no default, selected multiple' => ['value' => null, 'default' => null, 'old' => ['alfa', 'bravo'], 'expectedValue' => ['alfa', 'bravo']],
+            'no value, no default, selected none' => ['value' => null, 'default' => null, 'old' => [], 'expectedValue' => []],
 
             'value, no default, missing' => ['value' => ['alfa'], 'default' => null, 'old' => self::MISSING, 'expectedValue' => ['alfa']],
             'value, no default, selected' => ['value' => ['alfa'], 'default' => null, 'old' => ['bravo'], 'expectedValue' => ['bravo']],
             'value, no default, selected multiple' => ['value' => ['alfa'], 'default' => null, 'old' => ['bravo', 'charlie'], 'expectedValue' => ['bravo', 'charlie']],
+            'value, no default, selected none' => ['value' => ['alfa'], 'default' => null, 'old' => [], 'expectedValue' => []],
 
             'no value, default, missing' => ['value' => null, 'default' => ['alfa'], 'old' => self::MISSING, 'expectedValue' => ['alfa']],
             'no value, default, selected' => ['value' => null, 'default' => ['alfa'], 'old' => ['bravo'], 'expectedValue' => ['bravo']],
             'no value, default, selected multiple' => ['value' => null, 'default' => ['alfa'], 'old' => ['bravo', 'charlie'], 'expectedValue' => ['bravo', 'charlie']],
+            'no value, default, selected none' => ['value' => null, 'default' => ['alfa'], 'old' => [], 'expectedValue' => []],
 
             'value, default, missing' => ['value' => ['alfa'], 'default' => ['bravo'], 'old' => self::MISSING, 'expectedValue' => ['alfa']],
             'value, default, selected' => ['value' => ['alfa'], 'default' => ['bravo'], 'old' => ['charlie'], 'expectedValue' => ['charlie']],
             'value, default, selected multiple' => ['value' => ['alfa'], 'default' => ['bravo'], 'old' => ['charlie', 'delta'], 'expectedValue' => ['charlie', 'delta']],
+            'value, default, selected none' => ['value' => ['alfa'], 'default' => ['bravo'], 'old' => [], 'expectedValue' => []],
         ];
     }
 }

From 7305e86dc9ff6d8a88a7bb99ac09ec2f6f9c6288 Mon Sep 17 00:00:00 2001
From: Jason Varga <jason@pixelfear.com>
Date: Thu, 8 Dec 2022 17:38:03 -0500
Subject: [PATCH 2/2] Add equivalent test for toggle while we're at it

---
 tests/Tags/Concerns/RendersFormsTest.php | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tests/Tags/Concerns/RendersFormsTest.php b/tests/Tags/Concerns/RendersFormsTest.php
index 07633dc0b86..979faef57f6 100644
--- a/tests/Tags/Concerns/RendersFormsTest.php
+++ b/tests/Tags/Concerns/RendersFormsTest.php
@@ -186,6 +186,7 @@ public function renders_toggles($value, $default, $old, $expected)
         $rendered = $this->createField('toggle', $value, $default, $old);
 
         $this->assertSame($expected, (bool) $rendered['value']);
+        $this->assertStringContainsString('<input type="hidden" name="test" value="0">', $rendered['field']);
 
         if ($expected) {
             $this->assertStringContainsString('checked', $rendered['field']);