commit	e13dbacee404686afd0acf2d44b8d34869605e03	[log] [tgz]
author	Lann <github-lann@lannbox.com>	Mon Mar 02 16:50:45 2015
committer	Lann <github-lann@lannbox.com>	Mon Mar 02 16:50:45 2015
tree	ebdbeb1eed75b9a6ae5ed69c50245ce37641ae0f
parent	761840a43069cb9660fa35e2c9a1b058c5817109 [diff]
parent	5eadc24bb484ac8e325dd48b5299ed90787a9f5e [diff]

tree: ebdbeb1eed75b9a6ae5ed69c50245ce37641ae0f

README.md

Squirrel - fluent SQL generator for Go

import "github.com/lann/squirrel"

Squirrel is not an ORM.

Squirrel helps you build SQL queries from composable parts:

import sq "github.com/lann/squirrel"

users := sq.Select("*").From("users").Join("emails USING (email_id)")

active := users.Where(sq.Eq{"deleted_at": nil})

sql, args, err := active.ToSql()

sql == "SELECT * FROM users JOIN emails USING (email_id) WHERE deleted_at IS NULL"

sql, args, err := sq.
    Insert("users").Columns("name", "age").
    Values("moe", 13).Values("larry", sq.Expr("? + 5", 12)).
    ToSql()

sql == "INSERT INTO users (name,age) VALUES (?,?),(?,? + 5)"

Squirrel can also execute queries directly:

stooges := users.Where(sq.Eq{"username": []string{"moe", "larry", "curly", "shemp"}})
three_stooges := stooges.Limit(3)
rows, err := three_stooges.RunWith(db).Query()

// Behaves like:
rows, err := db.Query("SELECT * FROM users WHERE username IN (?,?,?,?) LIMIT 3",
                      "moe", "larry", "curly", "shemp")

Squirrel makes conditional query building a breeze:

if len(q) > 0 {
    users = users.Where("name LIKE ?", fmt.Sprint("%", q, "%"))
}

Squirrel wants to make your life easier:

// StmtCache caches Prepared Stmts for you
dbCache := sq.NewStmtCacher(db)

// StatementBuilder keeps your syntax neat
mydb := sq.StatementBuilder.RunWith(dbCache)
select_users := mydb.Select("*").From("users")

Squirrel loves PostgreSQL:

psql := sq.StatementBuilder.PlaceholderFormat(Dollar)

// You use question marks for placeholders...
sql, _, _ := psql.Select("*").From("elephants").Where("name IN (?,?)", "Dumbo", "Verna")

/// ...squirrel replaces them using PlaceholderFormat.
sql == "SELECT * FROM elephants WHERE name IN ($1,$2)"


/// You can retrieve id ...
query := sq.Insert("nodes").
    Columns("uuid", "type", "data").
    Values(node.Uuid, node.Type, node.Data).
    Suffix("RETURNING \"id\"").
    RunWith(m.db).
    PlaceholderFormat(sq.Dollar)

query.QueryRow().Scan(&node.id)

You can escape question mask by inserting two question marks:

SELECT * FROM nodes WHERE meta->'format' ??| array[?,?]

will generate with the Dollar Placeholder:

SELECT * FROM nodes WHERE meta->'format' ?| array[$1,$2]

License

Squirrel is released under the MIT License.