Sending Emails in Nestjs - email

Question

I am trying to send email in NestJs but seems to stuck at a weird error.
TypeError: Cannot destructure property 'templateName' of 'precompile(...)' as it is undefined.
Error [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client
at new NodeError (node:internal/errors:363:5)
at ServerResponse.setHeader (node:_http_outgoing:573:11)
I am not sure what's going on the only solution I was able to find was to put ''./'' in front of the template names but I am not sure why would that work also it isn't even working in my case.
This is how i am trying to send it
this.mailService.sendEmail(
emailAddress,
[], // cc
[], // bcc
"Pretty Subject Line", // subject
"./verify-email", // template
{ // context
name: "tetsName",
verifyLink
}
);
templates folder is in root directory

Answer 1

Cannot set header error mostly occurs when you are sending a response after once you have sent a response. Take a look at the following code
//This does not work
res.send("This is a Response");
res.send("This is a second response");
If you are doing something like this, then it won't work. Try a logic that does all the tasks you want in one go or use may
res.write("This is a response"):
res.end();

Answer 2

For me,this is a template file path issue. Review your template.dir in your MailerModule config, and compare it to your project "dist" directory. if your template file path is "dist/templates/template.hbs" then your template.dir should be ${process.cwd()}/templates else if your dist directory is "dist/src/templates/template.hbs" ,which is depend on your compile configs. then your template.dir config should be join(__dirname, 'templates')