Why ?
In my secret project to conquer the world, I want to store stuff.
This is an update after this article
The release is available here.
The database
I am using NeDB, a NoSQL database for nodeJS.
To install it, just use npm install nedb.
The test page
We're adding a page with a form to add dudes
(image from imdb)
The new page looks like this:
The page contains:
- a form
- a list of dudes
Le code
The database: creating or loading
Very hard:
var Datastore = require('nedb');
var db = new Datastore({
filename : getUserDataPath() + '/dudes.db',
autoload: true
});
The getUserDataPath() function returns the .exe directory:
function getUserDataPath() {
var path = require('path');
return path.dirname(process.execPath);
}
Saving user
Very hard again: db.insert, with the data to insert, and a callback:
function saveUser(firstName, lastName) {
db.insert({
firstName: firstName,
lastName: lastName
}, function(err, newDoc) {
if (err) {
console.log(err);
} else {
showUser(newDoc);
}
});
}
Retrieving all the users
A db.find, with an empty object {} retrieves all the users. We can add things to filter the results (see here):
function getAllTheThings() {
db.find({}, function(err, docs) {
for (var i = 0; i < docs.length; i++) {
showUser(docs[i]);
}
});
}
Other functions in the script.js are here for displaying stuff and are not the subject of this post.
Conclusion
Epic win ! We can use a Node.js database to save stuff !
Just one thing: node-webkit actually executes the html in a temporary directory (calling process.cwd() shows the folder).