在修改数据后，点击提交，出现TypeError: Cannot read properties of undefined (reading 'result')的错误

Question

问题遇到的现象和发生背景

 在修改数据后，点击提交，出现TypeError: Cannot read properties of undefined (reading 'result')的错误

问题相关代码，请勿粘贴截图

 var imgIds = this.fileList
        .map(item => {
          // console.log(item);  
          let fileType = this.matchType(item.response.result.s.fileName)           
          if(fileType == 'pdf'){
             return {
                    s:item.response.result.s?item.response.result.s.id:null,
                    see:item.response.result.see?item.response.result.see.arg:null
                    }
          }else{                   
              return false
          // return item.response.result.s.id
            }
        }
        ).filter(e=>e);
        if(imgIds.length > 0){
          values.imgIds = JSON.stringify(imgIds); 
        }

运行结果及报错内容

createBaseForm.js?6c71:617 TypeError: Cannot read properties of undefined (reading 'result')
    at eval (ShipUploadPage.vue?a6f6:762)
    at Array.map (<anonymous>)
    at eval (ShipUploadPage.vue?a6f6:759)
    at callback (createBaseForm.js?6c71:583)
    at Vue.validateFieldsInternal (createBaseForm.js?6c71:478)
    at eval (createBaseForm.js?6c71:610)
    at new Promise (<anonymous>)
    at Vue.validateFields (createBaseForm.js?6c71:571)
    at VueComponent.handleOk (ShipUploadPage.vue?a6f6:746)
    at invokeWithErrorHandling (vue.esm.js?efeb:1863)

我的解答思路和尝试过的方法

我想要达到的结果

修改后点击提交，显示修改成功

Answer 1

一楼给你网，二楼是给你鱼和网，而我，只是一个去海边走走停停的人。（不管是拿数据、操作数据之前，先判断）

Answer 2

以下都输出一下试试

 console.log(item);
 console.log(item.response);
console.log(item.response.result);

Answer 3

加个非空判断

  var imgIds = this.fileList
    .map(item => {
      // console.log(item);  
      if (item.response && item.response.result) { //加个 非空判断
        let fileType = this.matchType(item.response.result.s.fileName)
        if (fileType == 'pdf') {
          return {
            s: item.response.result.s ? item.response.result.s.id : null,
            see: item.response.result.see ? item.response.result.see.arg : null
          }
        } else {
          return false
          // return item.response.result.s.id
        }
      }

    }
    ).filter(e => e);
  if (imgIds.length > 0) {
    values.imgIds = JSON.stringify(imgIds);
  }