The validators folder contains middleware functions responsible for validating incoming requests to ensure they meet the required criteria. This helps to prevent invalid or malicious data from being processed by the application.
The folder contains a single file, index.js
, which exports a middleware function called validate
.
index.js
: This file exports a middleware function calledvalidate
, which is responsible for checking for validation errors in incoming requests.
The validate
middleware function performs the following tasks:
-
Validation Error Checking: It uses the
validationResult
function fromexpress-validator
to check for validation errors in the request. -
Error Extraction: If errors are found, it extracts the error messages from the validation errors.
-
Error Response: It returns a
400
error response with the extracted error messages.
The validate
middleware function is implemented using the following modules:
-
express-validator
: Provides thevalidationResult
function for checking validation errors. -
typedefs
: Provides type definitions for the application. -
jsonTransformer
: Provides thegetNestedValuesString
function for extracting nested error messages.
To use the validate
middleware function, simply import it into your JavaScript file and add it to your Express.js route as a middleware function.