yii2 Restful API Start with rest api

Example

We have a table that includes of countries so we create a model that called countrylist model

<?php

namespace app\models;

use Yii;

/**
 * This is the model class for table "countrylist".
 *
 * @property integer $id
 * @property string $iso
 * @property string $name
 * @property string $nicename
 * @property string $iso3
 * @property integer $numcode
 * @property integer $phonecode
 */
class Countrylist extends \yii\db\ActiveRecord
{
    /**
     * @inheritdoc
     */
    public static function tableName()
    {
        return 'countrylist';
    }

    /**
     * @inheritdoc
     */
    public function rules()
    {
        return [
            [['iso', 'name', 'nicename', 'phonecode'], 'required'],
            [['numcode', 'phonecode'], 'integer'],
            [['iso'], 'string', 'max' => 2],
            [['name', 'nicename'], 'string', 'max' => 80],
            [['iso3'], 'string', 'max' => 3]
        ];
    }

    /**
     * @inheritdoc
     */
    public function attributeLabels()
    {
        return [
            'id' => 'ID',
            'iso' => 'Iso',
            'name' => 'Name',
            'nicename' => 'Nicename',
            'iso3' => 'Iso3',
            'numcode' => 'Numcode',
            'phonecode' => 'Phonecode',
        ];
    }
}

and I create rest webservice for that, we create a controller for restapi and set modelClass variable for our model.

 <?php
    namespace app\controllers;
    use yii\rest\ActiveController;
    use Yii;
    class CountrylistController extends ActiveController
    {
      public $modelClass='app\models\Countrylist';
    }
?>

for using restapi we need pretty urls and
we add this rule for pretty url

'urlManager' => [
   'class' => 'yii\web\UrlManager',
   'enablePrettyUrl' => true,
   'showScriptName' => false,
   'rules' => [
       ['class'=>'yii\rest\UrlRule','controller'=>'countrylist']
       ],
    ],

after that we access to can test our rest api as an example

http://localhost/countrylist gives us list of counties.