knowledge tree & chapter tree - query condition check

src/views/accurateTeaching/library/index.vue

@@ -736,6 +736,7 @@ export default {
           // gradeid:301
         };
         this.deptOptions = [];
+        if (!Ajax.gradeId) return
         this.treeLoading = true;
         treeList(Ajax)
           .then((response) => {
@@ -760,6 +761,7 @@ export default {
           pharseId: this.queryParams.pharseId,
         };
         this.KnowledgeOptions = [];
+        if (!Ajax.subjectId) return
         this.treeLoading = true;
         knowledgeTree(Ajax)
           .then((response) => {