# CI-Node-query

A node query builder for various SQL databases, based on [CodeIgniter](http://www.codeigniter.com/user_guide/database/query_builder.html)'s query builder.

[![Build Status](https://jenkins.timshomepage.net/buildStatus/icon?job=node-query)](https://jenkins.timshomepage.net/job/node-query/)
[![Build Status](https://travis-ci.org/timw4mail/node-query.svg?branch=master)](https://travis-ci.org/timw4mail/node-query)
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### Features
* Callback and Promise API for making database calls.

### Supported adapters

* mysql
* mysql2
* pg
* dblite
* node-firebird (Not supported as of version 3.1.0, as the adapter is very difficult to test)

### Installation

	npm install ci-node-query

[![NPM](https://nodei.co/npm/ci-node-query.png?downloads=true&downloadRank=true)](https://nodei.co/npm/ci-node-query/)

### Basic use
```javascript
var nodeQuery = require('ci-node-query');

var connection = ... // Database module connection

// Three arguments: database type, database connection, database connection library
var query = nodeQuery.init('mysql', connection, 'mysql2');

// The third argument is optional if the database connection library has the same name as the adapter, eg..
nodeQuery.init('mysql', connection, 'mysql');
// Can be instead
nodeQuery.init('mysql', connection);

// You can also retrieve the instance later
query = nodeQuery.getQuery();

query.select('foo')
	.from('bar')
	.where('x', 3)
	.orWhere({y: 2})
	.join('baz', 'baz.boo = bar.foo', 'left')
	.orderBy('x', 'DESC')
	.limit(2, 3)
	.get(function(/* Adapter dependent arguments */) {
		// Database module result handling
	});

// As of version 3.1.0, you can also get promises
var queryPromise = query.select('foo')
	.from('bar')
	.where('x', 3)
	.orWhere({y: 2})
	.join('baz', 'baz.boo = bar.foo', 'left')
	.orderBy('x', 'DESC')
	.limit(2, 3)
	.get();

queryPromise.then(function(res) {
	// Handle query results
});
```

### Security notes
As of version 2, `where` and `having` type methods parse the values passed to look for function calls. While values passed are still passed as query parameters, take care to avoid passing these kinds of methods unfiltered input. SQL function arguments are not currently parsed, so they need to be properly escaped for the current database.


### Additional help

* Generated documentation is in the docs/ folder
* The API is documented in [API.md](./API.md)
* The `tests/adapters` folder contains examples of how to set up a connection for the appropriate database library
* The documentation generated for the latest dev build is also [Available](https://github.timshomepage.net/node-query/docs/)