From 251812f4265588a91a07370920c06ac885ba5ada Mon Sep 17 00:00:00 2001
From: Oleg Poludnenko <ua.oleg@gmail.com>
Date: Tue, 7 Jun 2016 13:17:53 +0300
Subject: [PATCH 1/2] Pass $form to the attribute

---
 framework/assets/yii.activeForm.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/framework/assets/yii.activeForm.js b/framework/assets/yii.activeForm.js
index 4ce37e7eb8..38f54d1438 100644
--- a/framework/assets/yii.activeForm.js
+++ b/framework/assets/yii.activeForm.js
@@ -302,6 +302,7 @@
 
             // client-side validation
             $.each(data.attributes, function () {
+                this.$form = $form;
                 if (!$(this.input).is(":disabled")) {
                     this.cancelled = false;
                     // perform validation only if the form is being submitted or if an attribute is pending validation

From b9eb09b8b5fa93c8bfd6a740931fbe4ca7d00367 Mon Sep 17 00:00:00 2001
From: Oleg Poludnenko <ua.oleg@gmail.com>
Date: Tue, 7 Jun 2016 13:22:55 +0300
Subject: [PATCH 2/2] Set attribute $form as a scope for selector

---
 framework/assets/yii.validation.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/framework/assets/yii.validation.js b/framework/assets/yii.validation.js
index c2df26f90f..06a006c872 100644
--- a/framework/assets/yii.validation.js
+++ b/framework/assets/yii.validation.js
@@ -383,7 +383,7 @@ yii.validation = (function ($) {
             return [];
         }
 
-        var files = $(attribute.input).get(0).files;
+        var files = $(attribute.input, attribute.$form).get(0).files;
         if (!files) {
             messages.push(options.message);
             return [];