arangodb Difficulty in Tutorial: Node.js (io.js) in 10 minutes

Question

Dear arangodb community,

How mature is arangojs? When I tried "Tutorial: Node.js (io.js) in 10 minutes", the exercises 1 thru 4 work as expected. But the 5 thru 10 failed. From the following exercise, I am getting

  Database created: undefined

     instead of 

  Database created: "mydb"

Thus the remaining exercises cannot continue, since the crucial object-bearing variable (mydb) is null. But, observing that "mydb" data base is correctly created in arangodb, my question is just related to the maturity of aragogojs (arangodb's Javascript driver). Or how do I fix it?

db.createDatabase('mydb', function(err, newdb) {
  if (err) {
    console.log('Failed to create database: %j',
      err.message);
  } else {
    console.log('Database created: %j', newdb.name);
    mydb = newdb;
  }
 });

Thanks

Ingo · Accepted Answer · 2015-12-18 13:00:33Z

2

The announced, updated node tutorial using the 4.x version of arangojs is available now.

Creating a new database changed to:

db.createDatabase('mydb').then(
  () => console.log('Database created'),
  err => console.error('Failed to create database:', err)
);

All asynchronous methods in the ArangoDB driver return promises but you can also pass a node-style callback instead:

db.createDatabase('mydb', function (err) {
  if (!err) console.log('Database created');
  else console.error('Failed to create database:', err);
});

answered Dec 18, 2015 at 13:00

Ingo

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Comments

Alan Plum · Accepted Answer · 2015-11-30 11:47:18Z

1

The Node tutorial is based on version 3.x of the arangojs driver. The driver has recently been updated to version 4.x, which contains a number of breaking API changes.

The tutorial will soon be updated to reflect these changes. In the meantime you can follow the tutorial by installing version 3 explicitly:

npm install arangojs@3

answered Nov 30, 2015 at 11:47

Alan Plum

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2 Comments

Joh Method Over a year ago

Alan, Thanks. arangogjs@3 is causing EPEERINVALID, which will require minor jiggering. I am looking forward to seeing the tutorial update. Since arangodb looks really good on paper, I'd like to confirm its maturity and production readiness. Please keep us posted. Regards

Alan Plum Over a year ago

@JohMethod that sounds like a problem with some other package having a conflict in its peer dependencies (arangojs doesn't have any of its own). As far as I understand peer dependencies the error shouldn't cause any problems in using arangojs itself. Similar problem: github.com/npm/npm/issues/4749

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