mysql-swift

MySQL client library for Swift. This is inspired by Node.js' mysql.

• Based on libmysqlclient
• Raw SQL query
• Simple query formatting and escaping (same as Node's)
• Mapping queried results to Codable structs or classes

Note: No asynchronous I/O support currently. It depends libmysqlclient.

// Declare a model

struct User: Codable, QueryParameter {
    let id: Int
    let userName: String
    let age: Int?
    let status: Status
    let createdAt: Date
    
    enum Status: String, Codable {
        case created = "created"
        case verified = "verified"
    }
    
    private enum CodingKeys: String, CodingKey {
        case id
        case userName = "user_name"
        case age
        case status = "status"
        case createdAt = "created_at"
    }
}
    
// Selecting
let nameParam = "some one"
let ids: [QueryParameter] = [1, 2, 3, 4, 5, 6]
let optionalInt: Int? = nil
let rows: [User] = try conn.query("SELECT id,user_name,status,status,created_at FROM `user` WHERE (age > ? OR age is ?) OR name = ? OR id IN (?)", [50, optionalInt, nameParam, QueryArray(ids)] ])

// Inserting
let age: Int? = 26
let user = User(id: 0, userName: "novi", age: age, status: .created, createdAt: Date())
let status = try conn.query("INSERT INTO `user` SET ?", [user]) as QueryStatus
let newId = status.insertedId

// Updating
let tableName = "user"
let defaultAge = 30
try conn.query("UPDATE ?? SET age = ? WHERE age is NULL;", [tableName, defaultAge])

Requirements

• Swift 5.0 or later
• MariaDB or MySQL Connector/C (libmysqlclient) 2.2.3 or later

macOS

Install pkg-config .pc file in cmysql or cmysql-mariadb.

# cmysql
$ brew tap novi/tap
$ brew install novi/tap/cmysql

# cmysql-mariadb
$ brew tap novi/tap
$ brew install novi/tap/cmysqlmariadb

Ubuntu

• Install libmariadbclient
• Follow Setting up MariaDB Repositories and set up your repository.

$ sudo apt-get install libmariadbclient-dev

Installation

Swift Package Manager

• Add mysql-swift to Package.swift of your project.

// swift-tools-version:5.2
import PackageDescription

let package = Package(
    ...,
    dependencies: [
        .package(url: "https://github.com/novi/mysql-swift.git", .upToNextMajor(from: "0.9.0"))
    ],
    targets: [
        .target(
            name: "YourAppOrLibrary",
            dependencies: [
                // add a dependency
                .product(name: "MySQL", package: "mysql-swift")
            ]
        )
    ]
)

Usage

Connection & Querying

1. Create a pool with options (hostname, port, password,...).
2. Use ConnectionPool.execute(). It automatically get and release a connection.

let option = Option(host: "your.mysql.host"...) // Define and create your option type
let pool = ConnectionPool(option: option) // Create a pool with the option
let rows: [User] = try pool.execute { conn in
	// The connection `conn` is held in this block
	try conn.query("SELECT * FROM users;") // And it returns result to outside execute block
}

Transaction

let wholeStaus: QueryStatus = try pool.transaction { conn in
	let status = try conn.query("INSERT INTO users SET ?;", [user]) as QueryStatus // Create a user
	let userId = status.insertedId // the user's id
	try conn.query("UPDATE info SET some_value = ? WHERE some_key = 'latest_user_id' ", [userId]) // Store user's id that we have created the above
}
wholeStaus.affectedRows == 1 // true

License

MIT