Patio query engine and ORM


Patio is a Sequel inspired query engine.

###Installation To install patio run

npm install comb patio

If you want to use the patio executable for migrations

npm install -g patio

###Running Tests

To run the tests

make test

To run just the postgres tests

make test-pg

To run just the mysql tests

make test-mysql

###Why Use Patio?

Patio is different because it allows the developers to choose the level of abtraction they are comfortable with.

If you want to use the ORM functionality you can. If you don't you can just use the Database and Datasets as a querying API, and if you need to you can write plain SQL


  1. Model definitions are defined by the tables in the database.

    As you add models the definition is automatically defined from the table definition. This is particularly useful when you want to define your model from a schema designed using another tool (i.e. ActiveRecord, Sequel, etc...)

  2. Patio tries to stay out of your way when querying.

    When you define a model you still have the freedom to do any type of query you want.

    Only want certain columns?"id", "name", "created").forEach(function(record){
        //record only has the id, name, and created columns 

    You want to join with another table?

    MyModel.join("otherTable", {id: patio.sql.identifier("myModelId"}).forEach(function(record){
        //Record has columns from your join table now! 

    You want to run raw SQL?"select * from my_model where name = 'Bob'").all().chain(function(records){
        //all records with a name that equals bob. 

    You want to just query the database and not use a model?

    var DB = patio.connect("pg://test:test@");
    DB.from("myTable").filter({id: [1,2,3]}).all().function(records){
       //records with id IN (1,2,3) 

###Getting Started

All the code for this example can be found here

  1. Create a new database


    psql -c "CREATE DATABASE reademe_example"


    mysql -e "CREATE DATABASE readme_example"
  2. Create a migration

    mkdir migration
    patio migration-file -n createInitialTables ./migration

    This will add a migration name createdInitialTables in your migration directory.

  3. Add the following code to your migration

    module.exports = {
        //up is called when you migrate your database up 
        upfunction (db) {
            //create a table called state; 
            return db
                .createTable("state", function () {
                .chain(function () {
                    //create another table called capital 
                    return db.createTable("capital", function () {
                        this.foreignKey("stateId", "state", {key: "id", onDelete: "CASCADE"});
        //down is called when you migrate your database down 
        downfunction (db) {
            //drop the state and capital tables 
            return db.dropTable("capital", "state");
  4. Run your migration

    patio migrate -v --camelize -u "<DB_CONNECTION_STRING>" -d ./migration
  1. Connect and query!

    var patio = require("patio");
    //set camelize = true if you want snakecase database columns as camelcase 
    patio.camelize = true;
    //define a State model with a relationship to capital 
    var State = patio.addModel("state").oneToOne("capital");
    //define a Capital model with a relationship to State 
    var Capital = patio.addModel("capital").manyToOne("state");
    //save a state 
            name: "Nebraska",
            population: 1796619,
            founded: new Date(1867, 2, 4),
            climate: "continental",
            //notice the capital relationship is inline 
            capital: {
                name: "Lincoln",
                founded: new Date(1856, 0, 1),
                population: 258379
        .chain(function () {
            //save a Capital 
                name: "Austin",
                founded: new Date(1835, 0, 1),
                population: 790390,
                //define the state inline 
                state: {
                    name: "Texas",
                    population: 25674681,
                    founded: new Date(1845, 11, 29)
        .chain(function () {
            //Query all the states by name 
            return State.order("name").forEach(function (state) {
                //Get the associated capital 
                return (capital) {
                    console.log("%s's capital is %s.",,;
        .chain(process.exit, function (err) {