Merge pull request #250 from lljj-x/fix/issues-245

fix(lib): 修复null值 不能重新赋值问题

Author: lljj-x

packages/lib/vue2/vue2-core/src/fields/combiningSchemas/SelectLinkageField/index.js

@@ -159,7 +159,7 @@ export default {
                     }
                 });
             } else {
-                setPathVal(this.rootFormData, this.curNodePath, newOptionData || curFormData);
+                setPathVal(this.rootFormData, this.curNodePath, newOptionData === undefined ? curFormData : newOptionData);
             }
 
             // 可添加一个配置通知外部这里变更

packages/lib/vue3/vue3-core/src/fields/combiningSchemas/SelectLinkageField/index.js

@@ -153,7 +153,7 @@ export default {
                     }
                 });
             } else {
-                setPathVal(props.rootFormData, props.curNodePath, newOptionData || curFormData);
+                setPathVal(props.rootFormData, props.curNodePath, newOptionData === undefined ? curFormData : newOptionData);
             }
         });