javascript - Error is thrown but error response object is empty in Mongoose -


i trying send request api.

my code this

app.post('/api/create', (req, res, next) => {   if (!req.headers || !req.headers.authorization) {     return res.status(500).json({       status: 'error',       err: 'no authorization header'     });   }    const bits = req.headers.authorization.split(' ');   const scheme = bits[0];   const token = bits[1];    jwt.verify(token, 'secret', function(err, decoded) {     if (!!err) {       return res.status(400).json({         status: 'error',         err: 'invalid credentials.'       });     }      //     const userid = decoded.id;      //     if (!userid) {       return res.status(400).json({         status: 'error',         err: 'user id missing',       });     }      //     const { postid } = req.params;      //     user.findbyid(userid).then(user => {       //       if (!user) {         return res.status(400).json({           status: 'error',           err: 'user not found',         });       }        //       post.findbyid(postid).then(event => {         //         if (!post) {           return res.status(400).json({             status: 'error',             err: 'post not found',           });         }          // ...        }).catch(err => {         // not find post         return res.status(400).json({           status: 'error',           msg: 'could not find post',           err         });       });     }).catch(err => {       // not find user       return res.status(400).json({         status: 'error',         msg: 'could not find user',         err       });     });   }); });

but receive error object

{   status: 'error',   msg: 'could not find post',   err: '' }

i.e. err empty. have no idea how debug this. catching error }).catch(err => {, expect write out error if ever reach catch() block.

what can cause problem?


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