Request Fields Validator

This module helps you to validate JSON fields in the body of HTTP requests.

Installation

To install the package, run the following command:

npm install request-fields-validator

USAGE

Use the module as middleware in your routers.

// Load the library
var validateFields = require('request-fields-validator');

// Create an array of objects where each object represents a field in the request.body
let arraySchema = [
  {
    fieldName: "age",
    type: "number",
    required: false,
    validator: {
      callback: (field, value) => value > 10,
      message: 'Age must be greater than 10',
      code: 400
    }
  },
  {
    fieldName: "name",
    type: "string",
    required: true,
    validator: {
      callback: (field, value) => value.length === 5,
      message: 'Name must be exactly 5 characters long',
      code: 400
    }
  }
];

// Example of request.body: {"age": 12, "name": "john doe"}

// In the router
router.post("/", validateFields(arraySchema), function(req, res, next) {
  return res.json({message: "hello world", code: 200});
});

Important Notes

• fieldName is required for each object defined in arraySchema.

• required is false by default. Set required: true if the field must exist in the request.body

• By default, the callback function takes two arguments: the first argument is the key defined in the request.body, and the second argument is the corresponding value to the key. The callback function must return either true or false.

License

ISC

Author

Mohsen2050