DAO

An implementation of DAO pattern for CoreData and Realm. Helps you think less about database in your application.

Features

• Use your persistence layer synchronously for CRUD operations.
• Abstraction of database objects (entries) from application objects (entities).
• Abstraction from concurrency.

Install

Cocoapods

For using with CoreData:

pod 'DAO/CoreData'

Or with Realm:

pod 'DAO/Realm'

Carthage

Make the following entry in your Cartfile:

github "RedMadRobot/DAO"

Then run carthage update.

At last, you need to set up your Xcode project manually to add the framework:

1. On “General” settings tab of your target, in the “Linked Frameworks and Libraries” section add each framework you want to use from Carthage/Build folder.

2. On “Build Phases” settings tab of your target, click the “+” icon and choose “New Run Script Phase”. Create a Run Script with the following content:

/usr/local/bin/carthage copy-frameworks

3. Add the paths to the frameworks you want to use under “Input Files”:

3.1. For using with CoreData:

$(SRCROOT)/Carthage/Build/iOS/CoreDataDAO.framework

3.2. Or with Realm:

$(SRCROOT)/Carthage/Build/iOS/RealmDAO.framework

4. Add the paths to the copied frameworks to the “Output Files”:

4.1. For using with CoreData:

$(BUILT_PRODUCTS_DIR)/$(FRAMEWORKS_FOLDER_PATH)/CoreDataDAO.framework

4.2. Or with Realm

$(BUILT_PRODUCTS_DIR)/$(FRAMEWORKS_FOLDER_PATH)/RealmDAO.framework

Usage

// Create DAO instance
let dao = RealmDAO(RLMMessageTranslator())

//...

// Create message entity
let message = Message(entityId: "abc", text: "text")

// Save message to database
try? dao.persist(message)

// Read saved message from database
let savedMessage = dao.read(message.entityId)

// Delete message from database
try? dao.erase(message.entityId)

Please look at the example project for more information.

When not recommended to use

• If you have big and complex database schema. Many entities, many relationships.
• If you want to use specific features of database. Realm Mobile Platform, for instance is not compatible with DAO implementation.
• If you have thousands of objects (> 10-20K). Performance can be the issue.

Requirements

• Xcode 11
• Swift 5
• iOS 9

Authors

Ivan Vavilov - iv@redmadrobot.com