Node.JS cradle and couchDB assistance - node.js

Question

I am a noob with Node.JS.
I am using CouchDB and Cradle.
In couchDB I have a database named 'test' and inside it I have a document named 'exercise'.
The document has 2 fields: "FullName" and "Age".
The code in order to save the data is as follows:
var cradle = require('cradle');
var connection = new(cradle.Connection)('http://127.0.0.1', 5984, {
auth: { username: 'toto_finish', password: 'password' }
});
var db = connection.database('test');
db.save('exercise', {
FullName: param_name, Age: param_age
}, function (err, res) {
if (err) {
// Handle error
response += ' SAVE ERROR: Could not save record!!\n';
} else {
// Handle success
response += ' SUCESSFUL SAVE: The record was saved in CouchDB!\n';
}
http_res.end(response);
});
this code works well and it saves the data to the CouchDB.
My problem is when I want to read the data.
The code that I wrote is:
var cradle = require('cradle');
var connection = new(cradle.Connection)('http://127.0.0.1', 5984, {
auth: { username: 'toto_finish', password: 'password' }
});
var db = connection.database('test');
db.view('exercise/all', {descending: true}, function(err, res)
{
console.log(res);
res.forEach(function (row) {
response = 'FullName: ' + row.FullName + '\n Age: ' + row.Age + '\n';
});
});
http_res.end(response);
when I am trying to print response, response is empty and I don't know what I am doing wrong. I know that it does not go inside the forEach loop but I don't understand why.
the console output is:
[ { id: 'exercise',
key: null,
value:
{ _id: 'exercise',
_rev: '1-7042e6f49a3156d2099e8ccb3cc7d937',
FullName: 'Toto Finish',
Age: '30' } } ]
Thanks in advance for any response or answer.

Answer 1

Try moving the http_res.send() call inside the callback provided to db.view - the anonymous function( err, res ) { }.
I'm not sure however about the .forEach statement, you'll only get the last value from your query in the response variable, you should look into that as well.

Answer 2

spotirca is right
The db.view function is async so http_res.end(response) gets called before the view returns any data.
You can prove this by returning the date in both the console.log and http_res.end
console.log(res, new Date())
and
http_res.end(response, new Date());
The http response will have the earlier date/Time.