GitHub - stephencelis/SQLite.swift: A type-safe, Swift-language layer over SQLite3. (original) (raw)

SQLite.swift

A type-safe, Swift-language layer over SQLite3.

SQLite.swift provides compile-time confidence in SQL statement syntax and intent.

Features

• A pure-Swift interface
• A type-safe, optional-aware SQL expression builder
• A flexible, chainable, lazy-executing query layer
• Automatically-typed data access
• A lightweight, uncomplicated query and parameter binding interface
• Developer-friendly error handling and debugging
• Full-text search support
• Well-documented
• Extensively tested
• SQLCipher support via CocoaPods
• Schema query/migration
• Works on Linux (with some limitations)
• Active support atStackOverflow, and Gitter Chat Room(experimental)

Usage

import SQLite

// Wrap everything in a do...catch to handle errors do { let db = try Connection("path/to/db.sqlite3")

let users = Table("users")
let id = Expression<Int64>("id")
let name = Expression<String?>("name")
let email = Expression<String>("email")

try db.run(users.create { t in
    t.column(id, primaryKey: true)
    t.column(name)
    t.column(email, unique: true)
})
// CREATE TABLE "users" (
//     "id" INTEGER PRIMARY KEY NOT NULL,
//     "name" TEXT,
//     "email" TEXT NOT NULL UNIQUE
// )

let insert = users.insert(name <- "Alice", email <- "alice@mac.com")
let rowid = try db.run(insert)
// INSERT INTO "users" ("name", "email") VALUES ('Alice', 'alice@mac.com')

for user in try db.prepare(users) {
    print("id: \(user[id]), name: \(user[name]), email: \(user[email])")
    // id: 1, name: Optional("Alice"), email: alice@mac.com
}
// SELECT * FROM "users"

let alice = users.filter(id == rowid)

try db.run(alice.update(email <- email.replace("mac.com", with: "me.com")))
// UPDATE "users" SET "email" = replace("email", 'mac.com', 'me.com')
// WHERE ("id" = 1)

try db.run(alice.delete())
// DELETE FROM "users" WHERE ("id" = 1)

try db.scalar(users.count) // 0
// SELECT count(*) FROM "users"

} catch { print (error) }

SQLite.swift also works as a lightweight, Swift-friendly wrapper over the C API.

// Wrap everything in a do...catch to handle errors do { // ...

let stmt = try db.prepare("INSERT INTO users (email) VALUES (?)")
for email in ["betty@icloud.com", "cathy@icloud.com"] {
    try stmt.run(email)
}

db.totalChanges    // 3
db.changes         // 1
db.lastInsertRowid // 3

for row in try db.prepare("SELECT id, email FROM users") {
    print("id: \(row[0]), email: \(row[1])")
    // id: Optional(2), email: Optional("betty@icloud.com")
    // id: Optional(3), email: Optional("cathy@icloud.com")
}

try db.scalar("SELECT count(*) FROM users") // 2

} catch { print (error) }

Read the documentation or explore more, interactively, from the Xcode project’s playground.

Installation

Swift Package Manager

The Swift Package Manager is a tool for managing the distribution of Swift code.

1. Add the following to your Package.swift file:

dependencies: [ .package(url: "https://github.com/stephencelis/SQLite.swift.git", from: "0.15.3") ]

1. Build your project:

See the Tests/SPM folder for a small demo project which uses SPM.

Carthage

Carthage is a simple, decentralized dependency manager for Cocoa. To install SQLite.swift with Carthage:

1. Make sure Carthage is installed.
2. Update your Cartfile to include the following:
   github "stephencelis/SQLite.swift" ~> 0.15.3
3. Run carthage update andadd the appropriate framework.

CocoaPods

CocoaPods is a dependency manager for Cocoa projects. To install SQLite.swift with CocoaPods:

1. Make sure CocoaPods is installed.

Using the default Ruby install will require you to use sudo when

installing and updating gems.

[sudo] gem install cocoapods 2. Update your Podfile to include the following:
use_frameworks!
target 'YourAppTargetName' do
pod 'SQLite.swift', '~> 0.14.0'
end 3. Run pod install --repo-update.

Manual

To install SQLite.swift as an Xcode sub-project:

1. Drag the SQLite.xcodeproj file into your own project. (Submodule, clone, or download the project first.)
   
2. In your target’s General tab, click the + button under Linked Frameworks and Libraries.
3. Select the appropriate SQLite.framework for your platform.
4. Add.

Some additional steps are required to install the application on an actual device:

1. In the General tab, click the + button under Embedded Binaries.
2. Select the appropriate SQLite.framework for your platform.
3. Add.

Communication

See the planning document for a roadmap and existing feature requests.

Read the contributing guidelines. The TL;DR (but please; R):

• Need help or have a general question? Ask on Stack Overflow (tag sqlite.swift).
• Found a bug or have a feature request? Open an issue.
• Want to contribute? Submit a pull request.

Original author

• Stephen Celis(@stephencelis)

License

SQLite.swift is available under the MIT license. See the LICENSE file for more information.

Related

These projects enhance or use SQLite.swift:

• SQLiteMigrationManager.swift (inspired byFMDBMigrationManager)

Alternatives

Looking for something else? Try another Swift wrapper (or FMDB):

• GRDB
• SQLiteDB
• Squeal