"Is there a way to convert a TINYINT(1) into a BOOLEAN in an express application

In my MySQL database, I have columns named infected and absence which are stored as TINYINT(1).

When I execute the following code in my backend:

app.get("/users", (req, res) => {
  const sql = `SELECT * from users`;
  connection.query(sql, (err, results) => {
    if (err) {
      return res.send(err);
    } else {
      return res.json({ results });
    }
  });
});

and in my ReactJS frontend:

  useEffect(() => {
    axios
      .get(`${config.server}/users`)
      .then((result) => {
        setUsers(result.data.results);
      })
      .catch((error) => console.error(error));
  }, [setUsers]);

I encounter an issue where filtering with

users.filter((u) => u.infected);
does not work. Only

users.filter((u) => u.infected === 1);

seems to be effective.

Since filtering using

users.filter((u) => u.infected);
is more intuitive for me, I am wondering how to address this best practice-wise. Should I consider:

  1. Storing values in a different type?
  2. Modifying the SELECT query?
  3. Translating values from 1 to TRUE and 0 to FALSE after querying?
  4. Adjusting values in the frontend post get request?

I am hesitant about option 4 as my frontend primarily expects booleans now that I have transitioned to MySQL.

Answer №1

Consider utilizing the !! operator as it will transform the value into a boolean type. This has the same effect as: Boolean(anyValue).

users.filter(u => !!u.infected);

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