通过firebase云功能发送电子邮件

Posted 2021-04-16

我有一个包含用户电子邮件的大查询表，我想向他们发送一封时事通讯电子邮件（表格中大约500行）当该功能运行时，它只会在超时之后向30-35位用户发送电子邮件，如果我减少列表到100，它会在一个电子邮件ID上多次发送电子邮件。下面是我的代码 - ：bigQuery.query（{

         exports.date = functions.https.onRequest((req, res) => {
     const bigQuery = bigquery({ projectId: 'littleone-150007' });
       var someVar = [];
        var someVar1 =[];

       bigQuery.query({
   query:`Select email from table`
   useLegacySql: false
 }).then(function (rows) {
  setValue(rows);
  });
  function setValue(value) {
  someVar = value;

   //console.log(someVar); // data is printing here

   var someVar = value[0].map(function(o) { return o.email; });

//console.log(someVar); 

var i,datalength;
datalength = someVar.length;

 var emailsubj=`subject`;
 var emailbody=`newsleter body`
 for(i=0;i<datalength;i++){
     //console.log(someVar[i])
      const mailOptions = {
       from: `Madhu from Mylo <[e-mail]>`,
       to: someVar[i],
       bcc: `[e-mail]`
       }
       mailOptions.subject = emailsubj ;
       mailOptions.html = emailbody;
       mailTransport.sendMail(mailOptions).then(() => {
        console.log('Uninstall mail sent :', someVar[i]);

       });
       }

我需要改变什么，以便只有一封邮件将发送给用户。

答案

如果您存储这样的电子邮件：

var someVar = ['[e-mail]', '[e-mail]'];

你可以这样做：

var someVar = ['[e-mail]', '[e-mail]'];
var sendTo = someVar.join(','); 
var mailOptions = {
  from: '[e-mail]', // sender address
  to: sendTo, // list of receivers
  subject: 'My newsletter', // Subject line
  html: '<b>content</b>', // html body
  // plain: 'Some text' // plain text
};