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1

1

I have some code that gets some data from a mongo database.

The function inside the express app.get will show in the browser url but in this code the results is appearing only in the console and not in the web page, as it should.

Here is the code:

async function showdb() 

 var MongoClient = require('mongodb').MongoClient;
 var url = "mongodb://localhost:27017/";

 MongoClient.connect(url, useNewUrlParser: true , function(err, db) 
 if (err) throw err;
 var dbo = db.db('mydb');
 dbo.collection('test').findOne(, function(err, result) 
 if (err) throw err;
 console.log(result);
 return result;
 // res.send(result); // commented out
 // db.close(); // commented out
 );
 );

 

Now the route:

app.get('/', (req, res) => 

 showdb().then(result => 
 res.send(result); // result is showing in the console
 )

)

res.send(result); should show the data in the browser but it's showing it in the console.

How can I fix this?

node.js mongodb express async-await

share|improve this question

asked Mar 27 at 22:15

Kevin PorcheKevin Porche

13488 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  What's in the console displaying? And what is its type?
  
  – Siamak Ferdos
  Mar 27 at 22:41
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Its displaying this: _id: 5c9669ee4f401121adb78209, desc: 'This is data'
  
  – Kevin Porche
  Mar 27 at 22:52
  

  
  
  
  

add a comment | 

1

1

I have some code that gets some data from a mongo database.

The function inside the express app.get will show in the browser url but in this code the results is appearing only in the console and not in the web page, as it should.

Here is the code:

async function showdb() 

 var MongoClient = require('mongodb').MongoClient;
 var url = "mongodb://localhost:27017/";

 MongoClient.connect(url, useNewUrlParser: true , function(err, db) 
 if (err) throw err;
 var dbo = db.db('mydb');
 dbo.collection('test').findOne(, function(err, result) 
 if (err) throw err;
 console.log(result);
 return result;
 // res.send(result); // commented out
 // db.close(); // commented out
 );
 );

 

Now the route:

app.get('/', (req, res) => 

 showdb().then(result => 
 res.send(result); // result is showing in the console
 )

)

res.send(result); should show the data in the browser but it's showing it in the console.

How can I fix this?

node.js mongodb express async-await

share|improve this question

asked Mar 27 at 22:15

Kevin PorcheKevin Porche

13488 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  What's in the console displaying? And what is its type?
  
  – Siamak Ferdos
  Mar 27 at 22:41
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Its displaying this: _id: 5c9669ee4f401121adb78209, desc: 'This is data'
  
  – Kevin Porche
  Mar 27 at 22:52
  

  
  
  
  

add a comment | 

I have some code that gets some data from a mongo database.

The function inside the express app.get will show in the browser url but in this code the results is appearing only in the console and not in the web page, as it should.

Here is the code:

async function showdb() 

 var MongoClient = require('mongodb').MongoClient;
 var url = "mongodb://localhost:27017/";

 MongoClient.connect(url, useNewUrlParser: true , function(err, db) 
 if (err) throw err;
 var dbo = db.db('mydb');
 dbo.collection('test').findOne(, function(err, result) 
 if (err) throw err;
 console.log(result);
 return result;
 // res.send(result); // commented out
 // db.close(); // commented out
 );
 );

 

Now the route:

app.get('/', (req, res) => 

 showdb().then(result => 
 res.send(result); // result is showing in the console
 )

)

res.send(result); should show the data in the browser but it's showing it in the console.

How can I fix this?

node.js mongodb express async-await

share|improve this question

asked Mar 27 at 22:15

Kevin PorcheKevin Porche

13488 bronze badges

async function showdb() 

 var MongoClient = require('mongodb').MongoClient;
 var url = "mongodb://localhost:27017/";

 MongoClient.connect(url, useNewUrlParser: true , function(err, db) 
 if (err) throw err;
 var dbo = db.db('mydb');
 dbo.collection('test').findOne(, function(err, result) 
 if (err) throw err;
 console.log(result);
 return result;
 // res.send(result); // commented out
 // db.close(); // commented out
 );
 );

 

app.get('/', (req, res) => 

 showdb().then(result => 
 res.send(result); // result is showing in the console
 )

)

share|improve this question

asked Mar 27 at 22:15

Kevin PorcheKevin Porche

13488 bronze badges

share|improve this question

asked Mar 27 at 22:15

Kevin PorcheKevin Porche

13488 bronze badges

asked Mar 27 at 22:15

Kevin PorcheKevin Porche

13488 bronze badges

asked Mar 27 at 22:15

Kevin PorcheKevin Porche

13488 bronze badges

2 Answers
2

active

oldest

votes

1

Both MongoClient.connect() and collection.findOne()
functions return a Promise, so you can chain them without using callbacks with less code:

function showdb() 

 var MongoClient = require('mongodb').MongoClient;
 var url = "mongodb://localhost:27017/";

 return MongoClient.connect(url, useNewUrlParser: true )
 .then((db) => 
 return db.db('mydb').collection('test').findOne();
 );

Now the showdb function will return a Promise to your route.

share|improve this answer

answered Mar 27 at 22:52

lifeisfoolifeisfoo

7,83033 gold badges4646 silver badges7474 bronze badges

add a comment | 

0

You didn't included the Port on which server is listening. Try to add below code this might help you

var app = express();
app.set('port', 3000);
var server= app.listen(app.get('port'), function()



 var port = server.address().port;
 console.log(" Iam at Port:" + " " + port);


);

share|improve this answer

answered Mar 27 at 22:21

AlexAlex

1844 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  That's not the case ... that code is at the bottom of the page. If I put th showdb code inside the app.get it works fine. It looks like something to do with the async?
  
  – Kevin Porche
  Mar 27 at 22:29
  

  
  
  
  

add a comment | 

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1

Both MongoClient.connect() and collection.findOne()
functions return a Promise, so you can chain them without using callbacks with less code:

function showdb() 

 var MongoClient = require('mongodb').MongoClient;
 var url = "mongodb://localhost:27017/";

 return MongoClient.connect(url, useNewUrlParser: true )
 .then((db) => 
 return db.db('mydb').collection('test').findOne();
 );

Now the showdb function will return a Promise to your route.

share|improve this answer

answered Mar 27 at 22:52

lifeisfoolifeisfoo

7,83033 gold badges4646 silver badges7474 bronze badges

add a comment | 

1

Both MongoClient.connect() and collection.findOne()
functions return a Promise, so you can chain them without using callbacks with less code:

function showdb() 

 var MongoClient = require('mongodb').MongoClient;
 var url = "mongodb://localhost:27017/";

 return MongoClient.connect(url, useNewUrlParser: true )
 .then((db) => 
 return db.db('mydb').collection('test').findOne();
 );

Now the showdb function will return a Promise to your route.

share|improve this answer

answered Mar 27 at 22:52

lifeisfoolifeisfoo

7,83033 gold badges4646 silver badges7474 bronze badges

add a comment | 

Both MongoClient.connect() and collection.findOne()
functions return a Promise, so you can chain them without using callbacks with less code:

function showdb() 

 var MongoClient = require('mongodb').MongoClient;
 var url = "mongodb://localhost:27017/";

 return MongoClient.connect(url, useNewUrlParser: true )
 .then((db) => 
 return db.db('mydb').collection('test').findOne();
 );

Now the showdb function will return a Promise to your route.

share|improve this answer

answered Mar 27 at 22:52

lifeisfoolifeisfoo

7,83033 gold badges4646 silver badges7474 bronze badges

function showdb() 

 var MongoClient = require('mongodb').MongoClient;
 var url = "mongodb://localhost:27017/";

 return MongoClient.connect(url, useNewUrlParser: true )
 .then((db) => 
 return db.db('mydb').collection('test').findOne();
 );

share|improve this answer

answered Mar 27 at 22:52

lifeisfoolifeisfoo

7,83033 gold badges4646 silver badges7474 bronze badges

answered Mar 27 at 22:52

lifeisfoolifeisfoo

7,83033 gold badges4646 silver badges7474 bronze badges

answered Mar 27 at 22:52

lifeisfoolifeisfoo

7,83033 gold badges4646 silver badges7474 bronze badges

0

You didn't included the Port on which server is listening. Try to add below code this might help you

var app = express();
app.set('port', 3000);
var server= app.listen(app.get('port'), function()



 var port = server.address().port;
 console.log(" Iam at Port:" + " " + port);


);

share|improve this answer

answered Mar 27 at 22:21

AlexAlex

1844 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  That's not the case ... that code is at the bottom of the page. If I put th showdb code inside the app.get it works fine. It looks like something to do with the async?
  
  – Kevin Porche
  Mar 27 at 22:29
  

  
  
  
  

add a comment | 

0

You didn't included the Port on which server is listening. Try to add below code this might help you

var app = express();
app.set('port', 3000);
var server= app.listen(app.get('port'), function()



 var port = server.address().port;
 console.log(" Iam at Port:" + " " + port);


);

share|improve this answer

answered Mar 27 at 22:21

AlexAlex

1844 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  That's not the case ... that code is at the bottom of the page. If I put th showdb code inside the app.get it works fine. It looks like something to do with the async?
  
  – Kevin Porche
  Mar 27 at 22:29
  

  
  
  
  

add a comment | 

You didn't included the Port on which server is listening. Try to add below code this might help you

var app = express();
app.set('port', 3000);
var server= app.listen(app.get('port'), function()



 var port = server.address().port;
 console.log(" Iam at Port:" + " " + port);


);

share|improve this answer

answered Mar 27 at 22:21

AlexAlex

1844 bronze badges

var app = express();
app.set('port', 3000);
var server= app.listen(app.get('port'), function()



 var port = server.address().port;
 console.log(" Iam at Port:" + " " + port);


);

share|improve this answer

answered Mar 27 at 22:21

AlexAlex

1844 bronze badges

answered Mar 27 at 22:21

AlexAlex

1844 bronze badges

answered Mar 27 at 22:21

AlexAlex

1844 bronze badges