calypso-level

A LevelDB driver for calypso.

Install

npm install calypso-level

Example

With query language:

``js
var calypso = require('calypso');
var level = require('levelup');
var LevelDriver = require('calypso-level');
var Query = calypso.Query;

var driver = LevelDriver.create({
collectionMap: {
'companies': level('./db')
}
});

var engine = calypso.configure({
driver: driver
});

engine.build(function(err, connection) {
var session = connection.createSession();

var query = Query.of('companies')
.ql('SELECT name, founded_year, total_money_raised AS worth ' +
'WHERE founded_year >= @year AND name NOT LIKE @term ' +
'ORDER BY founded_year DESC, name')
.params({ year: 1999, term: '%air%' });

session.find(query, function(err, companies) {
console.log(companies);
connection.close();
});
});
`

With object mapping:

`js
var calypso = require('calypso');
var level = require('levelup');
var LevelDriver = require('calypso-level');
var Query = calypso.Query;

var Company = function() {
this.name = null;
this.foundedYear = null;
this.worth = null;
};

var mapping = function(config) {
config
.of(Company)
.at('companies')
.map('name')
.map('foundedYear', { to: 'founded_year' })
.map('worth', { to: 'total_money_raised' });
};

var driver = LevelDriver.create({
collectionMap: {
'companies': level('./db')
}
});

var engine = calypso.configure({
driver: driver,
mappings: [mapping]
});

engine.build(function(err, connection) {
var session = connection.createSession();

var query = Query.of(Company)
.where('foundedYear', { gte: 1999 })
.and('name', { not: { like: '%air' } })
.orderBy({ foundedYear: 'desc' }, 'name');

session.find(query, function(err, companies) {
console.log(companies);
});
});
``

License

MIT