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javascriptnode.jsvercel

Why is this endpoint in my API returning [] and not 404 error?

I'm currently creating some API with Zeit Now, and I was trying to implement 404 error when the user variable is [] (an empty array), but when I fetch this endpoint, API is sending [] aswell. How can I implement it? Is it because the user is a promise?

const db = require('../../lib/db')
const escape = require('sql-template-strings')

module.exports = async (req, res) => {
  const user = await db.query(escape`
    SELECT *
    FROM users
    WHERE username = ${req.body.username}
    AND password = ${req.body.password}
  `)

  if (user === []) {
    res.status(404).json({ message: 'User with these credentials doesn\'t exist.' })
    return false
  }

  res.status(200).json(user)
}
Solution

  • Because 

    [] === [] // false

    So you want to check the length property

    if (user.length === 0) {
    res.status(404).json({ message: 'User with these credentials doesn\'t exist.' })
    return false
}