Load label translations from model attribute labels (#68)

* Load label translations from model attributes

Rebased from
 - 22cd96b Add check for empty data
 - 0110c6d Improve label handling
 - de23a7a Load label translations from model attributes

* gh-68 Add support for dataProvider / improve detection of labels by models

Author: Radon8472

CHANGELOG.md

@@ -2,6 +2,14 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## next release
+### Added
+- Support for bootstrap 4 (autodetect required bootstrap version)
+- Add `dataProvider` property to `DataTable`
+  - if set, property `data` is auto filled with models from dataProvider
+  - if models are found either in `dataProvider` or in `data`, column labels are loaded from
+    `Model::attributes()`
+
 ## v1.1.1
 ### Added
 - Add `extraColumns` property to `DataTable`, `DataTableColumn`, `DataTableAction`

README.md

@@ -20,6 +20,18 @@ to the require section of your `composer.json` file.
 
 ## Basic Usage
 
+```php
+<?= \nullref\datatable\DataTable::widget([
+    'dataProvider' => $dataProvider,
+    'columns' => [
+        'id',
+        'name',
+        'email'
+    ],
+]) ?>
+```
+
+For backwards compatibility the old usage via `data` is still supported
 ```php
 <?= \nullref\datatable\DataTable::widget([
     'data' => $dataProvider->getModels(),
@@ -31,6 +43,8 @@ to the require section of your `composer.json` file.
 ]) ?>
 ```
 
+
+
 ## DataTable options
 Also you can use all [Datatables options](https://datatables.net/reference/option/)
 

src/DataTable.php

@@ -8,7 +8,11 @@
 namespace nullref\datatable;
 
 use nullref\datatable\assets\DataTableAsset;
+use yii\base\Model;
 use yii\base\Widget;
+use yii\data\ActiveDataProvider;
+use yii\data\ArrayDataProvider;
+use yii\db\ActiveQueryInterface;
 use yii\helpers\ArrayHelper;
 use yii\helpers\Html;
 use yii\helpers\Inflector;
@@ -104,26 +108,44 @@ class DataTable extends Widget
     public $globalVariable = false;
     protected $_options = [];
 
+    /**
+     * @var \yii\data\DataProviderInterface the data provider for the view.
+     */
+    protected $_dataProvider;
+
     protected $_extraColumns = [];
 
+    /**
+     * @throws \yii\base\InvalidConfigException
+     * @throws \Exception if ArrayHelper::getValue()
+     */
     public function init()
     {
         parent::init();
+        if ($this->data === null) {
+            $this->data = is_null($this->_dataProvider) ? [] : $this->_dataProvider->getModels();
+        }
         DataTableAsset::register($this->getView());
         $this->initColumns();
         $this->initData();
     }
 
+    /**
+     * @throws \yii\base\InvalidConfigException
+     */
     protected function initColumns()
     {
         $this->_extraColumns = $this->extraColumns;
         if (isset($this->_options['columns'])) {
+            $demoObject = $this->getModel();
             foreach ($this->_options['columns'] as $key => $value) {
                 if (!is_array($value)) {
                     $value = [
                         'class' => DataTableColumn::class,
                         'attribute' => $value,
-                        'label' => Inflector::camel2words($value)
+                        'label' => $demoObject instanceof \yii\base\Model
+                             ? $demoObject->getAttributeLabel($value)
+                             : Inflector::camel2words($value)
                     ];
                 }
                 if (isset($value['type'])) {
@@ -147,6 +169,35 @@ protected function initColumns()
 
     }
 
+    /**
+     * Detect a model class from `dataProvider` or `data` attributes
+     *
+     * @see \yii\grid\DataColumn::getHeaderCellLabel()
+     *
+     * return Model|null    NULL is returned when only property $data is defined, and is either empty or first entry is not of type model
+     */
+    protected function getModel()
+    {
+        $provider = $this->_dataProvider;
+        if ($provider instanceof ActiveDataProvider && $provider->query instanceof ActiveQueryInterface) {
+            /* @var $modelClass Model */
+            $modelClass = $provider->query->modelClass;
+            $model = $modelClass::instance();
+        } elseif ($provider instanceof ArrayDataProvider && $provider->modelClass !== null) {
+            /* @var $modelClass Model */
+            $modelClass = $provider->modelClass;
+            $model = $modelClass::instance();
+        } else {
+            $models = $this->data;
+            //$model = (count($models)) ? $models[0] : null;
+            $model = reset($models);
+        }
+        return $model instanceof Model ? $model : null;
+    }
+
+    /**
+     * @throws \Exception if ArrayHelper::getValue() throws
+     */
     private function initData()
     {
         $this->_extraColumns = array_unique($this->_extraColumns);
@@ -242,11 +293,17 @@ protected function getParams()
 
     public function __get($name)
     {
+        if ($name == 'dataProvider') {
+            return $this->_dataProvider;
+        }
         return isset($this->_options[$name]) ? $this->_options[$name] : null;
     }
 
     public function __set($name, $value)
     {
+        if ($name == 'dataProvider') {
+            return $this->_dataProvider = $value;
+        }
         return $this->_options[$name] = $value;
     }
 

src/DataTableColumn.php

@@ -79,7 +79,7 @@ public function init()
             throw new InvalidConfigException("Either 'data' or 'render' properties must be specified.");
         }
 
-        if ($this->title === null) {
+        if ($this->title === null && !is_null($this->attribute)) {
             $this->title = Inflector::camel2words($this->attribute);
         }