Question

我有一个使用Express和Mongoose的NodeJS应用程序。我正在尝试编写POST路由，以便在发出对URL的POST请求（当前为/ api / v1 / forms /：formId）时，它会将变量设置为MongoDB数据库中的recipient`value。：formID将匹配MongoDB中的_id。

到目前为止，我有：

obj[2]

我知道这对app.post("/api/v1/forms/:formId", async (req, res) => { //TODO: Create Mailer and email templates before finalising route. const { _name, _email, _message } = req.body; const form = Form({ name = req.body._name, email = req.body._email, message = req.body._message, recipient = Form.findById(req.params.form_id, function(err, form) { if (err) res.send(err); }) }); const mailer = new Mailer(form, contactFormTemplate(form)); try { await mailer.send(); } catch (err) { res.status(422).send(err); } });字段来说不正确，但这是我能想到的最好的事情

Answer 1

按照你所做的，你可以这样做：

app.post("/api/v1/forms/:formId", async (req, res) => {
    //TODO: Create Mailer and email templates before finalising route.
    const { _name, _email, _message } = req.body;

    let recipient;
    try{
      recipient = await Form.findById(req.params.form_id).exec();
    } catch(err){
      res.status(422).send(err);
    }

    const form = Form({
      name: req.body._name,
      email: req.body._email,
      message: req.body._message,
      recipient: recipient
    });


    const mailer = new Mailer(form, contactFormTemplate(form));
    try {
      await mailer.send();
    } catch (err) {
      res.status(422).send(err);
    }
});

mongoose上的.exec()返回一个promise，因此可以使用async / await语法。

Answer 2

据我所知，这是我能想到的，

Form.findById(req.params.form_id, function(err, form) {
        if (err){
          res.send(err);
        }else{
          recipient = form.recipientValue;
        }
});

Answer 3

试试这个..

app.post("/api/v1/forms/:formId", async (req, res) => {
    const { _name, _email, _message } = req.body;

    let form;        

    try {
        form = await Form.findById(req.params.formId).select('recipient').exec();
    } catch (err) {
        res.send(err);
        return;
    }

    const nuForm = Form({
        name = req.body._name,
        email = req.body._email,
        message = req.body._message,
        recipient = form.recipient
    });

    try {
        await new Mailer(nuForm, contactFromTemplate(nuForm)).send();
    } catch(err) {
        res.status(422).send(err);
    }
}

ExpressJS / Mongoose将变量设置为MongoDB结果

3 个答案: