How to get a URL parameter in Express?

Question

My URL is coming this way http://localhost:3000/menus/5.5 and it’s bringing all the 5.5 records, but I wish the URL could look like this http://localhost:3000/menus?price=5.5 to have the same result, as you can see below;

The code that makes the query is this;

function getMenus (req, res) {
    var price = req.params.price;
        Menus
        .find({
            price
        }).exec((err, menu)  => {
            if(err){
                res.status(500).send({
                    message: 'Error na solicitação'
                });
            }else{
                if(!menu){
                    res.status(404).send({
                        message: 'Não existe nenhum Reviews nesse registro'
                    });
                }else{
                    res.status(200).send({
                        menu
                    });
                }
            }
        })
    }

Help me fix my controller code. I am not able to get the price value with the quoted URL, http://localhost:3000/menus?price=5.5.

NOTE: Please, the attribute value price cannot be fixed;

NOTE: I need to do the same test with the other attributes that are string.

In the test carried out above was considered this code;

router.get('/menus/:price', controller.getMenus);

See the statement;

According to the above image is being done with the price attribute, but it has to be done with the price and Description attributes of my entity in Node Express.

==========================UPDATING=========================

Following the suggestion, my method became like this;

function pesquisaEspecialMenus (req, res) {
        try {
            const { price, description } = req.query;
            let where = {};

            if (price) {
              where.price = price;
            }

            if (description) {
              where.description = { $regex: description, $options: 'i' };
            }

            const menu = await Menus.findOne(where).exec();

            // Caso não encontre nenhum registro para a busca especificada
            if (!menu){
              const message = 'Não existe nenhum Reviews nesse registro';
              console.error(message);
              res.status(404).send({ message });
              return;
            }

            // Se tudo correr bem
            res.status(200).send(menu);
          } catch(e) {
            const message = 'Erro na solicitação.';
            console.error(e);
            res.status(500).send({ message });
          }
    }

However the system is showing error in await

As you can see below;

Answer 1

Checking the expected result I see that you have two problems. The first is that you want to get the parameters according to the string presented in the parameters of query. To do so you need to use the attribute query of his req:

const { price, description } = req.query;

The second point is that you want to find a text that contain what happens in the description and for that you can use the operator $regex:

{ description: { $regex: description, $options: 'i' } };

Now gathering this information and allowing the parameters to be optional we have the following result in your controller:

const getMenus = async (req, res) => {
  try {
    const { price, description } = req.query;
    let where = {};

    if (price) {
      where.price = price;
    }

    if (description) {
      where.description = { $regex: description, $options: 'i' };
    }

    const menu = await Menus.findOne(where).exec();

    // Caso não encontre nenhum registro para a busca especificada
    if (!menu){
      const message = 'Não existe nenhum Reviews nesse registro';
      console.error(message);
      res.status(404).send({ message });
      return;
    }

    // Se tudo correr bem
    res.status(200).send(menu);
  } catch(e) {
    const message = 'Erro na solicitação.';
    console.error(e);
    res.status(500).send({ message });
  }
}

You can check the Mongoose documentation for different types of different conditions here.