采购需求单需求部门改为必填

src/views/purchase/PurchaseDemandList/add.vue

@@ -30,7 +30,7 @@
         </el-col>
 
         <el-col :span="1.5">
-          <el-form-item label="需求部门">
+          <el-form-item label="需求部门" prop="demandDept" :rules="{ required: true, message: '请选择需求部门', trigger: 'blur' }">
             <el-select clearable v-model="basicForm.demandDept" size="mini" :disabled="sonDisable" @focus="chooseOrg('DEPT_PARAM', true, '需求部门')" style="width: 200px">
               <el-option
                 v-for="item in deptOptions"