修改

src/components/school/student/stulist.vue

@@ -41,7 +41,7 @@
       <template v-slot:body-cell-AssistList="props">
         <q-td :props="props">
           <template v-for="(item,index) in  props.row.AssistList">
-            {{item.AssistName}}
+            {{item.AssistName}}<span :key="index" v-if="index!=props.row.AssistList.length-1">,</span>
           </template>
         </q-td>
       </template>