node.js Nodemailer 对象数组到 CSV 文件作为电子邮件中的附件

Question

我正在 node.js 使用 nodemailer 模块发送电子邮件。我有一组对象，我试图将其转换为 CSV 文件并将其附加到电子邮件中。我能够成功发送电子邮件，但 CSV 附件未正确填充（显示为空白）。我的代码类似于以下内容

var nodemailer = require('nodemailer');

// create reusable transporter object using SMTP transport
    var transporter = nodemailer.createTransport({
    service: 'Gmail',
    auth: {
        user: 'gmail.user@gmail.com',
        pass: 'userpass'
     }
});

var data = [{age:24,name:"bob"},{age:35,name:"andy"},...];

var mailOptions = {
    from: 'foo@blurdybloop.com', // sender address
    to: 'bar@blurdybloop.com', //receiver
    subject: 'Hello', // Subject line
    text: 'Hello world', // plaintext body
    html: '<b>Hello world</b>', // html body
    attachments: [{   
        filename: 'test.csv',
        content: data 
    }],
};

// send mail with defined transport object
transporter.sendMail(mailOptions, function(error, info){
    if(error){
        return console.log(error);
    }
    console.log('Message sent: ' + info.response);
});

我猜它无法读取对象数组，只能读取以逗号分隔的字符串？

Answer 1

您应该将附加 content 属性指定为字符串。

NodeMailer 无法自行转换格式。所以你需要在发送之前将数据转换成CSV。使用像 to-csv.

这样的模块

Answer 2

您可以创建对象数组或数组数组，然后使用 convert-array-to-csv 将其转换为 csv

   const {convertArrayToCSV} = require('convert-array-to-csv');

    var data = [{age:24,name:"bob"},{age:35,name:"andy"},...];

    //Array of objects so dont need to pass the header (age, name)
    const csvData = convertArrayToCSV(data);

    //In case you have array of arrays
    data= [[24,'bob'],[35,'andy']]
    header= ['age','name']

    const csvData = convertArrayToCSV(data, {
       header,
       separator: ',' 
     });


   var mailOptions = {
       from: 'foo@blurdybloop.com', 
       to: 'bar@blurdybloop.com', 
       subject: 'Hello', 
       text: 'Hello world', 
       html: '<b>Hello world</b>', 
       attachments: [{   
          filename: 'test.csv',
          content: csvData   // attaching csv in the content
        }],
       };

node.js Nodemailer 对象数组到 CSV 文件作为电子邮件中的附件

node.js Nodemailer array of objects to CSV file as attachment in email

javascript

node.js

csv

nodemailer