Express middleware for validating the request with Zod.
npm install valid-request-zodImport the middleware and Zod as below:
const validRequest = require('valid-request-zod');
const z = require('zod');Define a schema:
const updateProductSchema = {
params: z.object({
productId: z.string().regex(/^[0-9a-fA-F]{24}$/, 'Invalid ObjectId'),
}),
body: z.object({
name: z.string().transform((x) => x?.trim()),
category: z.string().transform((x) => x?.trim()),
price: z.number().min(0).multipleOf(0.01),
}),
};Install the middleware on a route:
app.post('/api/product/:productId', validRequest(updateProductSchema), (req, res, next) => {
const productId = req.params.productId;
const update = req.body;
// ...
});-
The middleware validates the chosen parts of the request against the provided schemas.
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If the request is valid, the request is updated with the sanitized data, and control passes to the next middleware.
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Otherwise, a 400 response is sent.