优化 options 逻辑

scss/components/form/_tree.scss

@@ -229,12 +229,12 @@
 
 
     &-item &-item>&-itemLabel,
-    &-item>&-placeholder {
+    &-item &-item>&-placeholder {
         padding-left: $Tree-indent;
     }
 
     &-item &-item &-item>&-itemLabel,
-    &-item &-item>&-placeholder {
+    &-item &-item &-item>&-placeholder {
         padding-left: $Tree-indent * 2;
     }
 

src/components/Tree.tsx

@@ -540,7 +540,8 @@ export class TreeSelector extends React.Component<
         />
       ) : null;
 
-      const isLeaf = !item.children || !item.children.length;
+      const isLeaf =
+        (!item.children || !item.children.length) && !item.placeholder;
 
       return (
         <li
@@ -646,8 +647,12 @@ export class TreeSelector extends React.Component<
               ) : null}
               {childrenItems}
             </ul>
-          ) : !childrenItems && item.placeholder ? (
-            <div className={cx('Tree-placeholder')}>{item.placeholder}</div>
+          ) : !childrenItems && item.placeholder && unfolded[item[valueField]] ? (
+            <ul className={cx('Tree-sublist')}>
+              <li className={cx('Tree-item')}>
+                <div className={cx('Tree-placeholder')}>{item.placeholder}</div>
+              </li>
+            </ul>
           ) : null}
         </li>
       );

src/renderers/Form/Options.tsx

@@ -540,6 +540,7 @@ export function registerOptionsControl(config: OptionsConfig) {
 
           if (!payload.ok) {
             env.notify('error', payload.msg || '新增失败，请仔细检查');
+            result = null;
           } else {
             result = payload.data || result;
           }
@@ -642,6 +643,7 @@ export function registerOptionsControl(config: OptionsConfig) {
 
           if (!payload.ok) {
             env.notify('error', payload.msg || '保存失败，请仔细检查');
+            result = null;
           } else {
             result = payload.data || result;
           }