uni-app头像上传（完善个人信息功能），后端NodeJs+MySQL

<template>
  <view class="page-main">
    <view class="upload">
      <text>头像：</text>
      <!-- <view class="box" @click="chooseUploads">
        <image class="box-img" src="../../static/index/jia.png"></image>
      </view> -->
      <view class="box" @click="upload">
        <image class="box-img" :src="avatar" mode=""></image>
      </view>
    </view>
    <view class="user-info">
      <view class="form">
        <uni-forms ref="form" :modelValue="formData" label-position="left">
          <!-- :rules="rules" name="iphone"name="password"   avatar-->
          <uni-forms-item label="姓名：" label-width="20px">
            <input class="input" type="text" value="" v-model="formData.Susername" placeholder="请输入姓名" />
          </uni-forms-item>
          <uni-forms-item label="性别：" label-width="0px">
            <input class="input" type="text" value="" v-model="formData.Ssex" placeholder="请输入性别" />
          </uni-forms-item>
          <uni-forms-item label="年龄：" label-width="0px">
            <input class="input" type="text" value="" v-model="formData.Sage" placeholder="请输入年龄" />
          </uni-forms-item>
          <uni-forms-item label="个人简介：" label-width="0px">
            <textarea class="input-textarea" type="textarea" value="" v-model="formData.direction"
              placeholder="请输入" />
          </uni-forms-item>
        </uni-forms>
        <button class="loginBtn" type="primary" @click="submit"><text class="btnValue">提交</text></button>
      </view>
    </view>
  </view>
</template>
<script>
  export default {
    data() {
      return {
         iconcheck:0, //头像是否改变
        avatar:"", //默认头像
        formData: {
          direction: '',
          Sage: '',
          Ssex: '',
          Susername: '',
        },
      }
    },
    methods: {
      upload(){
        uni.chooseImage({
          count:1,
          success: (res)=>{
            this.avatar=res.tempFilePaths[0]
          }
        })
      },
      submit(){
        console.log(this.avatar)
        var _this = this;
        uni.uploadFile({
            url: 'http://47.107.93.173:3000/avatar', //仅为示例，并非真实接口地址。
          filePath: _this.avatar,
          name: 'avatar',
            formData: {
            'direction':_this.formData.direction,
            'Sage':_this.formData.Sage,
            'Ssex':_this.formData.Ssex,
            'Susername':_this.formData.Susername,
            },
            success: (res) => {
                console.log(res);
            }
        });
      }
    }
  }
</script>

exports.avatar = (req,res)=>{
    const avatar ={
        avatar:req.file.filename
    }
    const info = req.body;
    Object.assign(info,avatar)
    let sql = 'update users  set avatar=?,Ssex=?,Sage=?,direction=? where Susername=?;';
    let data = [info.avatar,info.Ssex,info.Sage,info.direction,info.Susername]
    db.base(sql,data,(result) => {
        if(result.affectedRows >= 1){
           res.send({
               flag:1,
               data:data
           })
        }else{
            return res.send({flag:2});
        }
    })
    }