//require the module
var sql = require('sql');

//(optionally) set the SQL dialect
sql.setDialect('postgres');
//possible dialects: mssql, mysql, postgres (default), sqlite

//first we define our tables
var user = sql.define({
  name: 'user',
  columns: ['id', 'name', 'email', 'lastLogin']
});

var post = sql.define({
  name: 'post',
  columns: ['id', 'userId', 'date', 'title', 'body']
});

//now let's make a simple query
var query = user.select(user.star()).from(user).toQuery();
console.log(query.text); //SELECT "user".* FROM "user"

//something more interesting
var query = user
    .select(user.id)
    .from(user)
    .where(
      user.name.equals('boom').and(user.id.equals(1))
    ).or(
      user.name.equals('bang').and(user.id.equals(2))
    ).toQuery();

//query is parameterized by default
console.log(query.text); //SELECT "user"."id" FROM "user" WHERE ((("user"."name" = $1) AND ("user"."id" = $2)) OR (("user"."name" = $3) AND ("user"."id" = $4)))

console.log(query.values); //['boom', 1, 'bang', 2]

//queries can be named
var query = user.select(user.star()).from(user).toNamedQuery('user.all');
console.log(query.name); //'user.all'

//how about a join?
var query = user.select(user.name, post.body)
  .from(user.join(post).on(user.id.equals(post.userId))).toQuery();

console.log(query.text); //'SELECT "user"."name", "post"."body" FROM "user" INNER JOIN "post" ON ("user"."id" = "post"."userId")'

//this also makes parts of your queries composable, which is handy

var friendship = sql.define({
  name: 'friendship',
  columns: ['userId', 'friendId']
});

var friends = user.as('friends');
var userToFriends = user
  .leftJoin(friendship).on(user.id.equals(friendship.userId))
  .leftJoin(friends).on(friendship.friendId.equals(friends.id));

//and now...compose...
var friendsWhoHaveLoggedInQuery = user.from(userToFriends).where(friends.lastLogin.isNotNull());
//SELECT * FROM "user"
//LEFT JOIN "friendship" ON ("user"."id" = "friendship"."userId")
//LEFT JOIN "user" AS "friends" ON ("friendship"."friendId" = "friends"."id")
//WHERE "friends"."lastLogin" IS NOT NULL

var friendsWhoUseGmailQuery = user.from(userToFriends).where(friends.email.like('%@gmail.com'));
//SELECT * FROM "user"
//LEFT JOIN "friendship" ON ("user"."id" = "friendship"."userId")
//LEFT JOIN "user" AS "friends" ON ("friendship"."friendId" = "friends"."id")
//WHERE "friends"."email" LIKE %1

//Using different property names for columns
//helpful if your column name is long or not camelCase
var user = sql.define({
  name: 'user',
  columns: [{
      name: 'id'
    }, {
      name: 'state_or_province',
      property: 'state'
    }
  ]
});

//now, instead of user.state_or_province, you can just use user.state
console.log(user.select().where(user.state.equals('WA')).toQuery().text);
// "SELECT "user".* FROM "user" WHERE ("user"."state_or_province" = $1)"

// autogenerated by node-sql-generate v0.0.1 on Tue May 21 2013 01:04:12 GMT-0700 (PDT)
var sql = require('sql');

/**
 * SQL definition for database.bar
 */
exports.bar = sql.define({
    name: 'bar',
    columns: [
        'id',
        'foo_id'
    ]
});

/**
 * SQL definition for database.foo
 */
exports.foo = sql.define({
    name: 'foo',
    columns: [
        'id',
        'field_1',
        'foo_bar_baz'
    ]
});

/**
 * Adding a column to an existing table:
 */
var model = sql.define({ name: 'foo', columns: [] });
model.addColumn('id');

// If you try to add another column "id", node-sql will throw an error.
// You can suppress that error via:
model.addColumn('id', { noisy: false });