I'm searching for a solution to obtain a function that requires a parameter without actually invoking the function.
Example of current malfunctioning code:
const _validations = {
userID: (req) => check('userID').isString().isUUID('4').run(req),
};
async function (req, res, next) {
const allReqFields = { ...req.body, ...req.params, ...req.query };
const fieldsFound = [];
for (let key of Object.keys(allReqFields)) {
if (_.has(_validations, key)) {
fieldsFound.push(_validations[key](req));
}
}
await Promise.all(fieldsFound);
return next();
},
function (req, res, next) {
const errors = validationResult(req);
if (errors.isEmpty()) {
//ALWAYS HITS HERE
return next();
}else{}
}
Working code example, but undesired:
const _validations = {
userID: (req) => check('userID').isString().isUUID('4').run(req),
};
async function (req, res, next) {
const allReqFields = { ...req.body, ...req.params, ...req.query };
for (let key of Object.keys(allReqFields)) {
if (_.has(_validations, key)) {
await _validations[key](req);
}
}
return next();
},
function (req, res, next) {
const errors = validationResult(req);
if (errors.isEmpty()) {
//Correctly hits here
return next();
}else{
//Correctly hits here
}
}
To provide some context:
The function
(req) => check('userID').isString().isUUID('4').run(req),There will be additional keys/values within the _validations object.
Every function within _validations requires req to be passed as an argument.
The ultimate goal is to execute all those asynchronous functions while passing req to them.
The issue I'm currently facing is that
is appending a promise instead of the function for future invocation. As a result, fieldsFound.push(_validations[key](req));fieldsFound becomes an array of unresolved promises
Any suggestions? Thank you!