[5.x] Support multiple defaults for checkboxes fieldtype (#12021)

Co-authored-by: Jason Varga <[email protected]>

Author: godismyjudge95

src/Fieldtypes/Checkboxes.php

@@ -40,7 +40,7 @@ protected function configFieldItems(): array
                     'default' => [
                         'display' => __('Default Value'),
                         'instructions' => __('statamic::messages.fields_default_instructions'),
-                        'type' => 'text',
+                        'type' => 'taggable',
                     ],
                 ],
             ],

src/Fieldtypes/Taggable.php

@@ -4,6 +4,7 @@
 
 use Statamic\Facades\GraphQL;
 use Statamic\Fields\Fieldtype;
+use Statamic\Support\Arr;
 
 class Taggable extends Fieldtype
 {
@@ -38,7 +39,7 @@ public function preload()
 
     public function preProcess($data)
     {
-        return ($data) ? $data : [];
+        return Arr::wrap($data);
     }
 
     public function toGqlType()

tests/Fieldtypes/TaggableTest.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace Fieldtypes;
+
+use PHPUnit\Framework\Attributes\Test;
+use Statamic\Fields\Field;
+use Statamic\Fieldtypes\Taggable;
+use Tests\TestCase;
+
+class TaggableTest extends TestCase
+{
+    #[Test]
+    public function it_pre_processes()
+    {
+        $this->assertEquals(['foo'], $this->field()->preProcess('foo'));
+        $this->assertEquals(['foo'], $this->field()->preProcess(['foo']));
+        $this->assertEquals(['foo', 'bar'], $this->field()->preProcess(['foo', 'bar']));
+        $this->assertEquals([], $this->field()->preProcess(null));
+    }
+
+    private function field($config = [])
+    {
+        $ft = new Taggable;
+
+        return $ft->setField(new Field('test', array_merge($config, ['type' => $ft->handle()])));
+    }
+}