How to check if data insert is not null with NodeJs?

Question

I have a controller that when i insert data into the database it always inserted. Now i wanna check that if the data i create is null is must report an error. Here is my code:

// create new car
export async function createCar (req, res) {
    const car = new Car({
      car_id: id,
      name: req.body.name,
      color: req.body.color,
      brand: req.body.brand,
    });
    
    return car
      .save()
      .then((newCar) => {
        return res.status(201).json({
          success: true,
          message: 'New car created successfully',
          Car: newCar,
        });
      })
      .catch((error) => {
          console.log(error);
        res.status(500).json({
          success: false,
          message: 'Server error. Please try again.',
          error: error.message,
        });
      });
  }

And i check on postman even i let Name is NULL is still inserted. Furthermore, how can i check that COLOR, BRAND if it's null must also report an error. Please help me.

For this some package their he first one is JOI and the other one is express-validator this is called Request Validation — Smit Gajera
– Smit Gajera, Commented Aug 25, 2022 at 4:38
You can use your own middleware function for validating the API. This link contains information about middle functions using the express framework: https://expressjs.com/en/guide/using-middleware.html You can use middleware for POST requests for your URL or simply for POST requests. — Smit Gajera
– Smit Gajera, Commented Aug 25, 2022 at 4:40
Could you post the code and steps to help me with this, i really appreciate it. — kato
– kato, Commented Aug 25, 2022 at 4:50
if you are using mongoose you can define required inputs in the schema model ----> mongoosejs.com/docs/validation.html — sonEtLumiere
– sonEtLumiere, Commented Aug 25, 2022 at 4:51

Smit Gajera · Accepted Answer · 2022-08-25 04:54:29Z

1

Kato, please follow my boilerplate. I created it with the best practices, and it also provides high-end JOI request validation.

A boilerplate for building production-ready RESTful APIs using Node.js, ExpressJs, Mongoose and Joi (Request Validation)

Node-Express-Mongoose-Joi

answered Aug 25, 2022 at 4:54

Smit Gajera

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2 Comments

kato Over a year ago

i check you github and i wonder where you can check Name, description of Book if it's null or not null.

Smit Gajera Over a year ago

Using joi, we can check whether our entire request/json is a number or a string. For a special case like email, there is a methods email() we can use to validate that it's a valid email address.

kato · Accepted Answer · 2022-08-25 08:33:10Z

0

For validate before insert

// Validate request
if (!req.body.name) 
{
  res.status(400).send
  ({
      message: "Name can not be empty!"
  });
  return;
} else if (!req.body.color)
{
   res.status(400).send
   ({
       message: "Color can not be empty!"
   });
    return;
} else if (!req.body.brand) 
{
    res.status(400).send({
       message: "Brand can not be empty!"
    });
    return;
}

answered Aug 25, 2022 at 8:33

kato

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1 Comment

Community Over a year ago

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