fix

app/service/course/option.js

@@ -49,7 +49,7 @@ class OptionService extends Service {
             const node = data[i];
             if (node.parent_id == rootId) {
                 const newNode = {};
-                if (node.parent_id !== 0) ret.push({ id: 0, name: '全部', value: '' });
+                // if (node.parent_id == 0) newNode._child.push({ id: 0, name: '全部', value: '' });
                 newNode.id = node.id;
                 newNode.name = node.name;
                 newNode.tips = node.tips;
@@ -58,6 +58,7 @@ class OptionService extends Service {
                 newNode.level = node.level;
                 newNode.value = node.id;
                 newNode._child = this.getTrees(data, node.id);
+                if (newNode._child.length !== 0) newNode._child.unshift({ id: 0, name: '全部', value: '' });
                 ret.push(newNode);
             }
         }