过滤没有学段的班级

TEAMModelOS/ClientApp/src/view/student-account/ClassMgt.vue

@@ -625,7 +625,7 @@ export default {
             this.curClassIndex = 0
             this.filterYear = 'all'
             if (this.filterPeriod) {
-                this.classListShow = this.classList.filter(item => item.periodId == this.filterPeriod || !item.periodId)
+                this.classListShow = this.classList.filter(item => item.periodId == this.filterPeriod)
             } else {
                 this.classListShow = [...this.classList]
             }