From f41404931107cecc59696b3fac40667f69aef4df Mon Sep 17 00:00:00 2001
From: baiyaaaaa <bigpet1991@gmail.com>
Date: Fri, 23 Dec 2016 00:49:45 +0800
Subject: [PATCH] fix form async validate bug (#1936)

---
 packages/form/src/form.vue | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/packages/form/src/form.vue b/packages/form/src/form.vue
index b00634e44..b3f75605d 100644
--- a/packages/form/src/form.vue
+++ b/packages/form/src/form.vue
@@ -54,12 +54,13 @@
       },
       validate(callback) {
         let valid = true;
+        let count = 0;
         this.fields.forEach((field, index) => {
           field.validate('', errors => {
             if (errors) {
               valid = false;
             }
-            if (typeof callback === 'function' && index === this.fields.length - 1) {
+            if (typeof callback === 'function' && ++count === this.fields.length) {
               callback(valid);
             }
           });