From 3d1743db3255191dc5a9f6fa0a0acdac23846685 Mon Sep 17 00:00:00 2001
From: Justin Kahn <justindavidkahn@gmail.com>
Date: Fri, 19 Jul 2019 18:36:03 +0800
Subject: [PATCH] fix(Field): falsy values in contructor: fix #897

---
 src/field/index.js         |  4 ++--
 test/field/options-spec.js | 11 +++++++++++
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/src/field/index.js b/src/field/index.js
index d5fdb0659b..ec68c2d90d 100644
--- a/src/field/index.js
+++ b/src/field/index.js
@@ -107,8 +107,8 @@ class Field {
             defaultValue = originalProps[defaultValueName];
         } else if (parseName) {
             defaultValue = getIn(this.values, name);
-        } else {
-            defaultValue = (this.values && this.values[name]) || undefined;
+        } else if (this.values && typeof this.values[name] !== 'undefined') {
+            defaultValue = this.values[name];
         }
 
         Object.assign(field, {
diff --git a/test/field/options-spec.js b/test/field/options-spec.js
index dbb19dccdc..4e25ed2762 100644
--- a/test/field/options-spec.js
+++ b/test/field/options-spec.js
@@ -197,6 +197,17 @@ describe('options', () => {
             assert.equal(field.getValue('input'), inputValue);
         });
 
+        it('should set default field input values when given falsy `values` in constructor', function() {
+            const inputValue = 0;
+            const field = new Field(this, {
+                values: {
+                    input: inputValue
+                },
+            });
+            field.init('input');
+            assert.equal(field.getValue('input'), inputValue);
+        });
+
         it('should set default field input values when given `values` and `parseName` = true in constructor', function() {
             const inputValue = 'my value';
             const field = new Field(this, {