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JavaScript Build a REST API With Express Completing and Testing the API Test Routes with Postman

Peter Gess
Peter Gess
16,553 Points
Posted by Peter Gess
Peter Gess
16,553 Points

Getting an error when using Postman

When trying to make a GET on localhost:3000/questions I am getting a "not found" error. Below is my code for the GET. Any ideas?

router.get('/', function(req, res, next){
    Question.find({})
        .sort({createdAt: -1})
        .exec(function(err, questions){
            if(err) return next(err)
            res.json(questions)
    })
})

2 Answers

Adam Beer
Adam Beer
11,314 Points
Adam Beer
Adam Beer
11,314 Points

You started it the nodemon?

Peter Gess
Peter Gess
16,553 Points
Peter Gess
Peter Gess
16,553 Points

I did not use nodemon

Adam Beer
Adam Beer
11,314 Points
Adam Beer
Adam Beer
11,314 Points

Please install nodemon with npm install nodemon. Write into the terminal the nodemon command, when nodemon started the server, connect again with Postman. Hope this help.

Devon Stanton
Devon Stanton
7,793 Points
Devon Stanton
Devon Stanton
7,793 Points

I don't think nodemon is the issue here.

I'm having a similar issue where my 'Question is not defined' I think this has something to do with the Schema not being set up correctly but to be honest I'm a little confused as to how this all fits together 100%.

Below is my Schema, I don't see any inherent issues, I had a typo where I used 'test' instead of 'text' for the answer schema, unfortunately, that didn't correct the issue.

'use strict';

const mongoose = require('mongoose');
const Schema = mongoose.Schema;

const sortAnswers = (a, b) => {
  // (-) if a before b
  // 0 no change
  // (+) if a after b
  if(a.votes === b.votes) {
    return b.updatedAt - a.updatedAt;
  }
  return b.votes - a.votes;

}

const AnswerSchema = new Schema({
    text: String,
    createdAt: {type: Date, default: Date.now},
    updatedAt: {type: Date, default: Date.now},
    votes: {type: Number, default: 0}
});

AnswerSchema.method('update', function(updates, callback) {
  Object.assign(this, updates, {updatedAt: new Date()});
  this.parent().save(callback);
});

AnswerSchema.method('vote', function(vote, callback) {
  if(vote === 'up') {
    this.votes += 1;
  } else {
    this.vote -= 1;
  }
  this.parent().save(callback);
});

const QuestionSchema = new Schema({
  text: String,
  createdAt: {type: Date, default: Date.now},
  answers: [AnswerSchema]
});

QuestionSchema.pre('save', function (next) {
  this.answers.sort(sortAnswers);
  next();
});

const Question = mongoose.model('Question', QuestionSchema);

module.exports.Question = Question;

As with Peter's code snippet, I think everything is correctly written, I had a few errors prior to starting but now it 'seems' to run and only breaks down when I do a get or post request.

routes.js

//GET /questions
// Return all the questions
router.get('/', (req, res, next) => {
  Question.find({})
          .sort({createdAt: -1})
          .exec(function(err, questions) {
            if(err) return next(err);
            res.json(questions);
          });
});

//POST /questions
// Route for creation questions
router.post('/', (req, res, next) => {
  let question = new Question(req.body);
  question.save((err, question) => {
    if(err) return next(err);
    res.status(201);
    res.json(question);
  });
});
Devon Stanton
Devon Stanton
7,793 Points
Devon Stanton
Devon Stanton
7,793 Points

Nevermind, I found the typo. the require statement was incorrectly formatted.

I had ...

const Question = require('./models').Question;

instead of 

const question = require('./models').Question;

Subtle difference right, but glad I was able to find it. I hope this helps other troubleshoot their issues.