表单内联多个文件上传组件

使用antdv的upload组件时发现个怪异的问题，上传文件状态每次改变后都会触发change事件，所以上传成功、失败、删除都会触发，而怪异的就是删除后触发change，见下图

就算返回是空的，但只要出发了change，change都会默认返回如下结构的对象：

{
  file: { /* ... */ },
  fileList: [ /* ... */ ]
}

也因为如此，每次表单提交的时候就算没有附件也不会去校验，所以放弃了upload组件的change事件，采用表单的options.getValueFromEvent（因为我这里有多个上传组件，所以多穿了一个key）

<a-upload
  name="file"
  v-decorator="[
    'registerCertificatePath',
    {
      rules: [
        { required: true, message: '请上传公司注册信息证书！' }
      ],
      getValueFromEvent: e =>
        handleChange(e, 'registerCertificatePath')
    }
  ]"
  :file-list="registerCertificatePathList"
  :customRequest="file => uploadFile(file, 'registerCertificate')"
>
  <a-button><a-icon type="upload" />上传</a-button>
</a-upload>

定义两个方法，重置表单组件setFileList和组件的change回调handleChange（注意这里不是upload的change）

setFileList(fileKey) {
  // 根据filekey值清空指定的上传文件列表
  this[`${fileKey}List`] = [];
  // 清除对应的表单组件值
  this.lastForm.setFieldsValue({ [fileKey]: "" });
},
handleChange({ file, fileList }, key) {
  if (file.status === "removed" || file.status === "error") {
    // 当这两种状态时调用setFileList方法
    this.setFileList(key);
    return "";
  }
  // 给对应的上传组件文件列表赋值
  this[`${key}List`] = fileList;
  // 赋值给对应表单
  return file;
}

以下是上传的代码

uploadRequest(param)
 .then(({ success, message, data }) => {
   if (success) {
     const { fileName, filePath } = data;
     this.fileData[`${fileKey}Path`] = filePath;
     this.fileData[`${fileKey}Name`] = fileName;
     this.$message.success(message);
     // 上传成功将状态设置为 done
     file.onSuccess();
   } else {
     this.$message.warning(message);
     // 上传成功将状态设置为 error
     file.onError();
   }
 })
 .catch(error => {
   this.$message.error("上传失败！");
   console.log("上传失败：", error);
   // 上传成功将状态设置为 error
   file.onError();
 });

完整代码：

<template>
  <div class="last">
    <a-form
      :form="lastForm"
      :label-col="{ span: 10 }"
      :wrapper-col="{ span: 14 }"
      @submit="lastSubmit"
    >
      <a-row>
        <a-col :span="8">
          <a-form-item label="公司注册信息证书">
            <a-upload
              name="file"
              v-decorator="[
                'registerCertificatePath',
                {
                  rules: [
                    { required: true, message: '请上传公司注册信息证书！' }
                  ],
                  getValueFromEvent: e =>
                    handleChange(e, 'registerCertificatePath')
                }
              ]"
              :file-list="registerCertificatePathList"
              :customRequest="file => uploadFile(file, 'registerCertificate')"
            >
              <a-button><a-icon type="upload" />上传</a-button>
            </a-upload>
          </a-form-item>
        </a-col>
        <a-col :span="8">
          <a-form-item label="营业执照附件">
            <a-upload
              name="file"
              v-decorator="[
                'businessLicPath',
                {
                  rules: [{ required: true, message: '请上传营业执照附件！' }],
                  getValueFromEvent: e => handleChange(e, 'businessLicPath')
                }
              ]"
              :file-list="businessLicPathList"
              :customRequest="file => uploadFile(file, 'businessLic')"
            >
              <a-button><a-icon type="upload" />上传</a-button>
            </a-upload>
          </a-form-item>
        </a-col>
        <a-col :span="8">
          <a-form-item label="身份证件附件">
            <a-upload
              name="file"
              v-decorator="[
                'idCardCertificatePath',
                {
                  rules: [{ required: true, message: '请上传身份证件附件！' }],
                  getValueFromEvent: e =>
                    handleChange(e, 'idCardCertificatePath')
                }
              ]"
              :file-list="idCardCertificatePathList"
              :customRequest="file => uploadFile(file, 'idCardCertificate')"
            >
              <a-button><a-icon type="upload" />上传</a-button>
            </a-upload>
          </a-form-item>
        </a-col>
      </a-row>
      <div class="btn">
        <a-button @click="prev">
          上一步
        </a-button>
        <a-button type="primary" html-type="submit">
          完成注册
        </a-button>
      </div>
    </a-form>
  </div>
</template>

<script>
import { mapState } from "vuex";
import { uploadRequest } from "../../request/http";

export default {
  computed: {
    ...mapState(["oid", "billKey"])
  },
  data() {
    return {
      lastForm: this.$form.createForm(this, { name: "lastForm" }),
      fileData: {
        registerCertificateName: "", // 公司注册证书
        registerCertificatePath: "", // 公司注册证书路径
        businessLicName: "", // 营业执照附件
        businessLicPath: "", // 营业执照附件路径
        idCardCertificateName: "", // 身份证件附件
        idCardCertificatePath: "" // 身份证件附件路径
      },
      registerCertificatePathList: [],
      businessLicPathList: [],
      idCardCertificatePathList: []
    };
  },
  methods: {
    lastSubmit(e) {
      e.preventDefault();
      this.lastForm.validateFields((err, values) => {
        if (!err) {
          values = this.fileData;
          this.$emit("sub", values);
        }
      });
    },
    prev() {
      this.$emit("prev");
    },
    setFileList(fileKey) {
      this[`${fileKey}List`] = [];
      this.lastForm.setFieldsValue({ [fileKey]: "" });
    },
    handleChange({ file, fileList }, key) {
      if (file.status === "removed" || file.status === "error") {
        this.setFileList(key);
        return "";
      }
      this[`${key}List`] = fileList;
      return file;
    },
    uploadFile(file, fileKey) {
      const formData = new FormData();
      formData.append("file", file.file);
      const param = {
        billKey: this.billKey,
        billId: this.oid,
        data: formData
      };
      uploadRequest(param)
        .then(({ success, message, data }) => {
          if (success) {
            const { fileName, filePath } = data;
            this.fileData[`${fileKey}Path`] = filePath;
            this.fileData[`${fileKey}Name`] = fileName;
            this.$message.success(message);
            file.onSuccess();
          } else {
            this.$message.warning(message);
            file.onError();
          }
        })
        .catch(error => {
          this.$message.error("上传失败！");
          console.log("上传失败：", error);
          file.onError();
        });
    }
  }
};
</script>
<style lang="less">
.last {
  .ant-upload {
    width: 100%;
    text-align: left;
    .ant-btn{
      width: 230px;
    }
  }
  .ant-upload-list {
    text-align: left;
  }
}
</style>