add contract controller(s) changes

backend/controllers/ContractController.php

@@ -60,11 +60,13 @@ class ContractController extends Controller {
 				'dataProvider' => $dataProvider 
 		] );
 	}
-	/**
-	 * Lists all Contract models.
-	 * 
-	 * @return mixed
-	 */
+
+    /**
+     * Lists all Contract models.
+     *
+     * @return mixed
+     * @throws NotFoundHttpException
+     */
 	public function actionIndexCustomer($id) {
 		$model = Customer::findOne ( $id );
 		
@@ -82,13 +84,14 @@ class ContractController extends Controller {
 				'dataProvider' => $dataProvider 
 		] );
 	}
-	
-	/**
-	 * Displays a single Contract model.
-	 * 
-	 * @param integer $id        	
-	 * @return mixed
-	 */
+
+    /**
+     * Displays a single Contract model.
+     *
+     * @param integer $id
+     * @return mixed
+     * @throws NotFoundHttpException
+     */
 	public function actionView($id) {
 		return $this->render ( 'view', [ 
 				'model' => $this->findModel ( $id ) 
@@ -115,14 +118,15 @@ class ContractController extends Controller {
 			] );
 		}
 	}
-	
-	/**
-	 * Updates an existing Contract model.
-	 * If update is successful, the browser will be redirected to the 'view' page.
-	 * 
-	 * @param integer $id        	
-	 * @return mixed
-	 */
+
+    /**
+     * Updates an existing Contract model.
+     * If update is successful, the browser will be redirected to the 'view' page.
+     *
+     * @param integer $id
+     * @return mixed
+     * @throws NotFoundHttpException
+     */
 	public function actionUpdate($id) {
 		$model = $this->findModel ( $id );
 		
@@ -217,7 +221,13 @@ class ContractController extends Controller {
 				'index' 
 		] );
 	}
-	public function actionDetails($id) {
+
+    /**
+     * @param $id
+     * @return string
+     * @throws NotFoundHttpException
+     */
+    public function actionDetails($id) {
 		$contract = Contract::findOne ( $id );
 		// ticket_installment_request