vue 怎么将表单的值（字符串和数组格式）传给后台

前几天使用vue-element-admin框架开发了一个简单的后台管理系统，在开发的过程之中也遇到了一些功能，以及对饿了么框架的使用遇到的一些问题，如何解决问题，记录一下。

资料相关

vue-element-admin

推荐指数：star:55k
Github 地址：https://github.com/PanJiaChen/vue-element-admin
Demo体验：https://panjiachen.github.io/vue-element-admin/#/dashboard

今天记录一个功能，提交表单的数据给后端，提交表单时候的请求参数差不多是这样子的，其中有单选框，下选框，（下拉框可以选择一个值，也可以选择多个值），以字符串数组的格式提交。

请求报文如下


{"questionContent":"题目1","correctAnswer":"正确答案","otherAnswer1":"错误答案1","otherAnswer2":"错误答案2","otherAnswer3":"错误答案3","userGrades":["kinderGarten","firstGrade","threeGrade","sixGrade"],"questionCategory":"简单"}

具体提交格式需要注意：
1：input输入框提交类型为字符串
2：radio只能单选，每次只能提交一个，类型为字符串
3：下拉框（年级）为数组，当选择一个option或者多个option的时候，格式都为字符串数组形式。

点击按钮，会出现一个弹框，在弹框里面有form表单，填写表单数据，再次点击确定的时候，调用一下保存的接口，将填写的数据提交给后端。

示例代码

<template>
  <div class="tab-container">
    <el-button
      class="filter-item"
      style="margin-left: 10px;"
      type="primary"
      icon="el-icon-edit"
      @click="handleCreate"
    >添加</el-button>
    <el-dialog :visible.sync="dialogFormVisible">
      <el-form
        :model="questionForm"
        ref="dataForm"
        label-position="left"
        label-width="90px"
        style="width: 400px; margin-left:50px;"
      >
        <el-form-item label="题目" prop="questionContent">
          <el-input type="textarea" :rows="2" v-model="questionForm.questionContent"></el-input>
        </el-form-item>
        <el-form-item label="分类">
          <el-radio-group v-model="questionForm.questionCategory" style="margin-right:12px;">
            <el-radio v-for="(radio, index) in subjectList" :key="index" :label="radio">{{radio}}</el-radio>
          </el-radio-group>
        </el-form-item>
        <el-form-item label="正确答案" prop="correctAnswer">
          <el-input v-model="questionForm.correctAnswer" />
        </el-form-item>
        <el-form-item label="其他答案1" prop="otherAnswer1">
          <el-input v-model="questionForm.otherAnswer1" />
        </el-form-item>
        <el-form-item label="其他答案2" prop="otherAnswer2">
          <el-input v-model="questionForm.otherAnswer2" />
        </el-form-item>
        <el-form-item label="其他答案3" prop="otherAnswer3">
          <el-input v-model="questionForm.otherAnswer3" />
        </el-form-item>
        <el-form-item label="所属年级">
          <el-select
            v-model="questionForm.userGrades"
            class="filter-item"
            placeholder="选择年级"
            multiple
          >
            <el-option
              v-for="item in tabMapOptions"
              :key="item.key"
              :label="item.label"
              :value="item.key"
            />
          </el-select>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogFormVisible = false">取消</el-button>
        <el-button type="primary" @click=" createData() ">确定</el-button>
      </div>
    </el-dialog>
  </div>
</template>
<script>
//调用接口
import { saveSubject } from "@/api/content";
export default {
  data() {
    return {
      subjectList: ["黄金", "白银", "钻石"],
      input: "",
      tabMapOptions: [
        { label: "幼儿园", key: "kinderGarten" },
        { label: "一年级", key: "firstGrade" },
        { label: "二年级", key: "secondGrade" },
        { label: "三年级", key: "threeGrade" },
        { label: "四年级", key: "fourthGrade" },
        { label: "五年级", key: "fifthGrade" },
        { label: "六年级", key: "sixGrade" },
        { label: "小学以上", key: "gradeSchool" },
      ],

      questionForm: {
        questionContent: "",
        correctAnswer: "",
        otherAnswer1: "",
        otherAnswer2: "",
        otherAnswer3: "",
        userGrades: [],
        questionCategory: "",
      },
      dialogFormVisible: false,
    };
  },
  methods: {
    handleCreate() {
      this.questionForm = {
        questionContent: "",
        correctAnswer: "",
        otherAnswer1: "",
        otherAnswer2: "",
        otherAnswer3: "",
        userGrades: [],
        questionCategory: "",
      };
      this.dialogFormVisible = true;
    },
    //添加增加题目
    async createData() {
      let form = null;
      form = this.questionForm;
      const params = form;
      const res = await saveSubject(params);
      console.log(res);
      if (res.code === "0000") {
        this.$message({
          type: "info",
          message: "保存成功",
        });
        this.dialogFormVisible = false;
        this.getQuerySubjectList();
        return;
      }
      this.$message({
        type: "error",
        message: "保存失败",
      });
    },
  },
};
</script>
<style scoped>
.tab-container {
  margin: 30px;
}
</style>

查看请求报文：

提交成功