有正确的方法来传播arangojs吗？

Question

I'd like to use arangojs 3.4.2 in my project. Since 3.0 there are no promises used by the driver. After trying several libs to promisify the driver i have no success (bluebird,promisify-node...): each time the driver returns a new instance that instance is not promisified, and i have to promisify the new instance again to use with promises:

var Promise=require('bluebird');
var arango=require('arangojs');
db=Promise.promisifyAll(new arango("http://localhost:8529"));
/*db is promisified properly*/
testdb=db.databaseAsync('test').then(function(testInstance){
    /*
    the testInstance returned by the driver is not promisified
    to use it with promises i've to promisify again
    */
})

Is there a way to achieve this?

Answer 1

That is correct.

If you want to promisify all the methods of all the objects in the driver, you need to promisify the prototypes' methods directly:

var Database = require('arangojs/lib/Database');
Promise.promisifyAll(Database.prototype);

var db = new Database('http://localhost:8529');
db.databasesAsync().then(function (databases) {
  databases.forEach(function (database) {
    assertTrue(typeof database.databaseAsync === 'function');
  });
});

Answer 2

As of version 3.5, if the global Promise constructor is defined when an asynchronous function is called, the function will also return a promise.

https://github.com/arangodb/arangojs