Issue #3029: Implement ActiveForm and ActiveField

extensions/bootstrap/ActiveForm.php

+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\bootstrap;
+
+use yii\helpers\ArrayHelper;
+use yii\helpers\Html;
+use yii\base\InvalidConfigException;
+use Yii;
+
+/**
+ * A Bootstrap 3 enhanced version of [[yii\widgets\ActiveForm]].
+ *
+ * This class mainly adds the [[layout]] property to choose a Bootstrap 3 form layout.
+ * So for example to render a horizontal form you would:
+ *
+ * ```php
+ * use yii\bootstrap\ActiveForm;
+ *
+ * $form = ActiveForm::begin(['layout' => 'horizontal'])
+ *  ```
+ *
+ * This will set default values for the [[yii\bootstrap\ActiveField|ActiveField]]
+ * to render horizontal form fields. In particular the [[yii\bootstrap\ActiveField::template|template]]
+ * is set to `{label} {beginWrapper} {input} {error} {endWrapper} {hint}` and the
+ * [[yii\bootstrap\ActiveField::horizontalCssClasses|horizontalCssClasses]] are set to:
+ *
+ * ```php
+ * [
+ *     'offset' => 'col-sm-offset-3',
+ *     'label' => 'col-sm-3',
+ *     'wrapper' => 'col-sm-6',
+ *     'error' => '',
+ *     'hint' => 'col-sm-3',
+ * ]
+ * ```
+ *
+ * To get a different column layout in horizontal mode you can modify those options
+ * through [[fieldConfig]]:
+ *
+ *
+ * ```php
+ * $form = ActiveForm::begin([
+ *     'layout' => 'horizontal',
+ *     'fieldConfig' => [
+ *         'template' => "{label}\n{beginWrapper}\n{input}\n{hint}\n{error}\n{endWrapper}",
+ *         'horizontalCssClasses' => [
+ *             'label' => 'col-sm-4',
+ *             'offset' => 'col-sm-offset-4',
+ *             'wrapper' => 'col-sm-8',
+ *             'error' => '',
+ *             'hint' => '',
+ *         ],
+ *     ],
+ * ]);
+ * ```
+ *
+ * @see \yii\bootstrap\ActiveField for details on the [[fieldConfig]] options
+ * @see http://getbootstrap.com/css/#forms
+ *
+ * @author Michael Härtl <haertl.mike@gmail.com>
+ * @since 2.0
+ */
+class ActiveForm extends \yii\widgets\ActiveForm
+{
+    /**
+     * @var array HTML attributes for the form tag. Default is `['role' => 'form']`.
+     */
+    public $options = ['role' => 'form'];
+
+    /**
+     * @var string the form layout. Either 'standard' (default), 'horizontal' or 'inline'.
+     * By chosing a layout, an appropriate default field configuration is applied. This will
+     * render the form fields with slightly different markup for each layout. You can
+     * override these defaults through [[fieldConfig]].
+     * @see \yii\bootstrap\ActiveField for details on Bootstrap 3 field configuration
+     */
+    public $layout = 'standard';
+
+    /**
+     * @inheritDoc
+     */
+    public function init()
+    {
+        if (!in_array($this->layout, ['standard','horizontal','inline'])) {
+            throw new InvalidConfigException('Invalid layout type: '.$this->layout);
+        }
+
+        if ($this->layout!=='standard') {
+            Html::addCssClass($this->options, 'form-'.$this->layout);
+        }
+        if (!isset($this->fieldConfig['class'])) {
+            $this->fieldConfig['class'] = ActiveField::className();
+        }
+        return parent::init();
+    }
+}

extensions/bootstrap/CHANGELOG.md

@@ -4,6 +4,7 @@ Yii Framework 2 bootstrap extension Change Log
 2.0.0 beta under development
 ----------------------------
 
+- Enh #3029: Added `ActiveForm` and `ActiveField` (mikehaertl)
 - Bug #2361: `yii\bootstrap\NavBar::brandUrl` should default to the home URL of application (qiangxue)
 - Enh #1474: Added option to make NavBar 100% width (cebe)
 - Enh #1552: It is now possible to use multiple bootstrap NavBar in a single page (Alex-Code)