如何更新承诺内的变量然后捕获

Question

I am using sequalize & trying to build a small function to check DB connection status

const DBStatus = async(data)=>{
    sequelize
      .authenticate()
      .then(() => {
        data.status=true;
        console.log('Connection has been established successfully.');
      })
      .catch(err => {
    data.status=false;
        console.error('Unable to connect to the database:', err);
      });
    return data
}

I want to return data.status based on promise status

Answer 1

When you use async you should use the await keyword with try / catch , not .then and catch

const DBStatus = async (data) => {
    try {
        const result = await sequelize.authenticate();
        data.status = true;
        console.log('Connection has been established successfully.');
        // if you want to resolve this promise with a value then use return
        return result
    } catch(err) {
        data.status=false;
        // if you want to reject the promise with a value then use throw
        throw err;
        console.error('Unable to connect to the database:', err);
    }
}