From 35687c3d04a0b94979223fb6b747e6184895a0bd Mon Sep 17 00:00:00 2001
From: Trotyl Yu <trotyl@qq.com>
Date: Mon, 11 Dec 2017 16:07:25 +0800
Subject: [PATCH] fix(module:rate): ensure value to be number (#728)

---
 src/components/rate/nz-rate.component.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/components/rate/nz-rate.component.ts b/src/components/rate/nz-rate.component.ts
index de0dd78186..e897586b62 100644
--- a/src/components/rate/nz-rate.component.ts
+++ b/src/components/rate/nz-rate.component.ts
@@ -160,8 +160,8 @@ export class NzRateComponent implements OnInit, ControlValueAccessor {
     };
   }
 
-  writeValue(value: number): void {
-    this.nzValue = value;
+  writeValue(value: number | null): void {
+    this.nzValue = value || 0;
   }
 
   registerOnChange(fn: (_: number) => void): void {