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ExpressJS: Middleware control flow for Router.param() & Router.use()


ExpressJS: Middleware control flow for Router.param() & Router.use()

By : asvvan
Date : November 22 2020, 10:48 AM
To fix the issue you can do You are using router.use() which attach to the middleware stack and get executed in its declaration order whenever the router is triggered by a request on its defined routes.
If you replace router.use() with router.all() it'll be executed after the router.param(). So you can do something like:
code :
router.route('/:obj')
            .all(validationMiddleware)
            .get(getHandler);
router.param('obj', resolveObj);


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ExpressJS router middleware cannot render views

ExpressJS router middleware cannot render views


By : Dennis
Date : March 29 2020, 07:55 AM
To fix this issue Inside routes/users.js you use router.get('/users'. I believe that should be router.get('/'. The way you have it set up would only handle requests to http://localhost:3000/users/users.
ExpressJS > router middleware > passing variable req.foo via redirect not working

ExpressJS > router middleware > passing variable req.foo via redirect not working


By : Maria Fernanda Vega
Date : March 29 2020, 07:55 AM
around this issue That is the expected behaviour. req object is created anew for each new request and your redirection i.e. res.redirect('/bar') results in a new request.
Solution: You may use some package e.g.connect-flash which stores variables in a temporary session object, which can be used only once. You need to set required values in your flash objects before redirecting. Then after redirection, you will be able to get the saved values from the flash object itself.
NodeJs + ExpressJS: router level middleware not able to take the request

NodeJs + ExpressJS: router level middleware not able to take the request


By : jayanth
Date : March 29 2020, 07:55 AM
wish help you to fix your issue I am making REST calls to my server. Now when I design my codes to handle routes in application level its working without any problems. But when I handle it using router level middleware its not working, , You have to register the router with app as shown below
code :
app.use('/',router);
Param as router - ExpressJS

Param as router - ExpressJS


By : Pandattacks
Date : October 31 2020, 05:55 AM
With these it helps What you need is to make a middleware so you can do the llogic for all the routes that have the :id param, for example:
code :
app.use('/something/:id', (req, res, next) => {
    //some code logic
    //error handling
    if(error){ next(error); }
    else { next(); }
});
app.param('id', (req, res, next, id) => {
    somefunction()
    .then(() => {
        //some logic with param.id
        next();
    })
    .catch((error) => {
        next(error);
    });
});
Expressjs: throw new TypeError('Router.use() requires a middleware function but got a ' + gettype(fn))

Expressjs: throw new TypeError('Router.use() requires a middleware function but got a ' + gettype(fn))


By : Kev
Date : March 29 2020, 07:55 AM
Hope that helps I have been having some problems with trying to get my code to work. I have tried a couple things but and it says my error is in line 28: "app.use('/','indexRouter')" but I have no clue why. My index.js file and app.js file are copies of each other. , indexRouter and userRouter should not be a string.
code :
app.use('/', indexRouter)
app.use('/users', userRouter)
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