如何在从 POST 请求接收到变量后将变量传递给 GET 请求

Question

Can't figure out how to pass a variable to GET request after receiving it from the frontend.

 app.post('/subcategories', (req, res) => {
  //receive category id from front
   const category_id = req.body.category;
 })

 app.get('/subcategories', (req, res) => {
    // need to replace the 25 with the variable I recieved from the above POST request
    const category_id = 25;
    db.query('SELECT subcategory_name FROM subcategories WHERE category_id=(?)',
    [category_id],
    (err, result) =>{
      res.send({result})
    });
 })

Answer 1

You can directly pass the category_id to GET using query parameters.

Do something like:

/subcategories?category_id=25

catch it in the GET api using:

let category_id = req.query.category_id

Answer 2

you can pass category_id as a query when making a get request and grab the category_id in the '/subcategories' route using req.query .

make get requests like this.

/subcategories?categoryid=25

get it in a query object like this.

let categoryId = req.query.categoryid