Merge branch 'develop' of https://github.com/octobercms/october into develop

modules/backend/classes/FormField.php

@@ -467,6 +467,7 @@ class FormField
         $triggerField = array_get($this->trigger, 'field');
         $triggerCondition = array_get($this->trigger, 'condition');
         $triggerForm = $this->arrayName;
+        $triggerMulti = '';
 
         // Apply these to container
         if (in_array($triggerAction, ['hide', 'show']) && $position != 'container') {
@@ -486,11 +487,18 @@ class FormField
             $triggerForm = HtmlHelper::reduceNameHierarchy($triggerForm, $triggerFieldParentLevel);
         }
 
+        // Preserve multi field types
+        if (Str::endsWith($triggerField, '[]')) {
+            $triggerField = substr($triggerField, 0, -2);
+            $triggerMulti = '[]';
+        }
+
+        // Final compilation
         if ($this->arrayName) {
-            $fullTriggerField = $triggerForm.'['.implode('][', HtmlHelper::nameToArray($triggerField)).']';
+            $fullTriggerField = $triggerForm.'['.implode('][', HtmlHelper::nameToArray($triggerField)).']'.$triggerMulti;
         }
         else {
-            $fullTriggerField = $triggerField;
+            $fullTriggerField = $triggerField.$triggerMulti;
         }
 
         $newAttributes = [

tests/unit/backend/widgets/FormTest.php

@@ -0,0 +1,41 @@
+<?php
+
+use Backend\Widgets\Form;
+use Illuminate\Database\Eloquent\Model;
+
+class FormTestModel extends Model
+{
+
+}
+
+class FormTest extends TestCase
+{
+    public function testCheckboxlistTrigger()
+    {
+        $form = new Form(null, [
+            'model' => new FormTestModel,
+            'arrayName' => 'array',
+            'fields' => [
+                'trigger' => [
+                    'type' => 'checkboxlist',
+                    'options' => [
+                        '1' => 'Value One'
+                    ]
+                ],
+                'triggered' => [
+                    'type' => 'text',
+                    'trigger' => [
+                        'field' => 'trigger[]',
+                        'action' => 'show',
+                        'condition' => 'value[1]'
+                    ]
+                ]
+            ]
+        ]);
+
+        $form->render();
+
+        $attributes = $form->getField('triggered')->getAttributes('container', false);
+        $this->assertEquals('[name="array[trigger][]"]', array_get($attributes, 'data-trigger'));
+    }
+}