Add empty option for group field

app/Form/Fields/GroupField.php

@@ -16,6 +16,8 @@ class GroupField extends Field
     public bool $required;
     public ?string $parentField = null;
     public ?int $parentGroup = null;
+    public bool $hasEmptyOption;
+    public string $emptyOptionValue;
 
     public static function name(): string
     {
@@ -28,6 +30,8 @@ class GroupField extends Field
             ['key' => 'required', 'default' => true, 'rules' => ['required' => 'present|boolean'], 'label' => 'Erforderlich'],
             ['key' => 'parent_field', 'default' => null, 'rules' => ['parent_field' => 'present|nullable|string'], 'label' => 'Übergeordnetes Feld'],
             ['key' => 'parent_group', 'default' => null, 'rules' => ['parent_group' => ['present', 'nullable', Rule::in(Group::pluck('id')->toArray())]], 'label' => 'Übergeordnete Gruppierung'],
+            ['key' => 'has_empty_option', 'default' => false, 'rules' => ['has_empty_option' => ['present', 'boolean']], 'label' => 'Leere Option erlauben'],
+            ['key' => 'empty_option_value', 'default' => '', 'rules' => ['empty_option_value' => ['present', 'string']], 'label' => 'Leere Option'],
         ];
     }
 
@@ -42,6 +46,8 @@ class GroupField extends Field
             'required' => $faker->boolean(),
             'parent_field' => null,
             'parent_group' => null,
+            'has_empty_option' => $faker->boolean(),
+            'empty_option_value' => '',
         ];
     }
 
@@ -56,11 +62,11 @@ class GroupField extends Field
         $rules[] = 'integer';
 
         if ($this->parentGroup) {
-            $rules[] = Rule::in(Group::find($this->parentGroup)->children()->pluck('id'));
+            $rules[] = Rule::in(Group::find($this->parentGroup)->children()->pluck('id')->push(-1));
         }
 
         if ($this->parentField && request()->input($this->parentField)) {
-            $rules[] = Rule::in(Group::find(request()->input($this->parentField))->children()->pluck('id'));
+            $rules[] = Rule::in(Group::find(request()->input($this->parentField))->children()->pluck('id')->push(-1));
         }
 
         return [$this->key => $rules];
@@ -84,7 +90,7 @@ class GroupField extends Field
 
     public function getPresenter(): Presenter
     {
-        return app(GroupPresenter::class);
+        return app(GroupPresenter::class)->field($this);
     }
 
     /**

app/Form/Presenters/GroupPresenter.php

@@ -2,17 +2,30 @@
 
 namespace App\Form\Presenters;
 
+use App\Form\Fields\GroupField;
 use App\Group;
-use Carbon\Carbon;
 
 class GroupPresenter extends Presenter
 {
 
+    private GroupField $field;
+
+    public function field(GroupField $field): self
+    {
+        $this->field = $field;
+
+        return $this;
+    }
+
     /**
      * @param ?int $value
      */
     public function present($value): string
     {
+        if ($value === -1) {
+            return $this->field->emptyOptionValue;
+        }
+
         if (!$value) {
             return '';
         }

packages/adrema-form

@@ -1 +1 @@
-Subproject commit 31b03b69ed3d57888cd82d1bfedcd0cb2b9cdc3c
+Subproject commit 42a2f6cb08cdac743fe7c06c719ddf536bb58244

resources/js/views/formtemplate/GroupField.vue

@@ -8,6 +8,24 @@
         inline
         @update:modelValue="$emit('update:modelValue', {...modelValue, required: $event})"
     ></f-switch>
+    <f-switch
+        id="has_empty_option"
+        v-model="modelValue.has_empty_option"
+        label="Leere Option erlauben"
+        size="sm"
+        name="has_empty_option"
+        inline
+        @update:modelValue="$emit('update:modelValue', {...modelValue, has_empty_option: $event})"
+    ></f-switch>
+    <f-text
+        v-if="modelValue.has_empty_option"
+        id="empty_option_value"
+        v-model="modelValue.empty_option_value"
+        label="Wert der leeren Option"
+        size="sm"
+        name="empty_option_value"
+        @update:modelValue="$emit('update:modelValue', {...modelValue, empty_option_value: $event})"
+    ></f-text>
     <f-select
         id="parent_field"
         :options="fieldOptions"