I'm trying to figure out a way to use req.params as an argument in my middleware. Take this (obviously broken) code for example:
router.post('/:myParam', checkSchema(schemas[req.params.myParam]), async (req, res, next) => {
// do stuff
})
The goal here is that I am using express-validator and I load a dynamic schema based on what param is passed. The above code is obviously broken because I don't yet have the scope to access the req variable, I'm just trying to illustrate what I'm trying to accomplish.
if you know the possible params ahead, you could do something like the following:
router.post("/:myParam", checkSchema("soccer"), async (req, res, next) => {});
//checkSchema.JS
const soccerSchema = require("../schemas/soccerSchema");
const swimmingSchema = require("../schemas/swimmingSchema");
module.exports = function (schemaName) {
return (req, res, next) => {
const schemas = { soccer: soccerSchema, swimming: swimmingSchema };
//You can access it here schemas[schemaName]
console.log(schemas[schemaName]);
next();
};
};You can directly call schemas(req.params.myParam) inside the checkSchema middleware since the middleware will have access to the request object.