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Why is Expess Js showing request body undefined even after using body parser?

I'm having issue with the request body being undefined even after using the body-parser. I'm using prefixed routing also.

 //adding router
const route = require('./routes/route')
app.use('/api',route)


//body-parser
app.use(bodyParser.json())

This is the issue.

TypeError: Cannot read property 'firstName' of undefined
    at E:\Projects\MEAN\routes\route.js:24:29
    at Layer.handle [as handle_request] (E:\Projects\MEAN\node_modules\express\lib\router\layer.js:95:5)
    at next (E:\Projects\MEAN\node_modules\express\lib\router\route.js:137:13)
    at Route.dispatch (E:\Projects\MEAN\node_modules\express\lib\router\route.js:112:3)
    at Layer.handle [as handle_request] (E:\Projects\MEAN\node_modules\express\lib\router\layer.js:95:5)
    at E:\Projects\MEAN\node_modules\express\lib\router\index.js:281:22
    at Function.process_params (E:\Projects\MEAN\node_modules\express\lib\router\index.js:335:12)
    at next (E:\Projects\MEAN\node_modules\express\lib\router\index.js:275:10)
    at Function.handle (E:\Projects\MEAN\node_modules\express\lib\router\index.js:174:3)
    at router (E:\Projects\MEAN\node_modules\express\lib\router\index.js:47:12)
    at Layer.handle [as handle_request] (E:\Projects\MEAN\node_modules\express\lib\router\layer.js:95:5)
    at trim_prefix (E:\Projects\MEAN\node_modules\express\lib\router\index.js:317:13)
    at E:\Projects\MEAN\node_modules\express\lib\router\index.js:284:7
    at Function.process_params (E:\Projects\MEAN\node_modules\express\lib\router\index.js:335:12)
    at next (E:\Projects\MEAN\node_modules\express\lib\router\index.js:275:10)
    at expressInit (E:\Projects\MEAN\node_modules\express\lib\middleware\init.js:40:5)
Solution

  • The issue is caused when I used router config above the body-parser config

    like this

    //adding router
const route = require('./routes/route')
app.use('/api',route)


//body-parser
app.use(bodyParser.json())

    but simply changing the order solved my issue. like this,

    //body-parser
app.use(bodyParser.json())

//adding router
const route = require('./routes/route')
app.use('/api',route)