Table of Contents

4.1. Introduction

4.2. Domain Description

4.2.1. A Blogging System

4.2.2. Terminology

4.2.3. Domain Diagram

4.3. Native Model "Has One" Related Foreign Record

4.3.1. Setup

4.3.2. SQL for Lazy-Load

4.3.3. Foreign Key

4.3.4. Has One Or Null

4.3.5. Relationship Definition

4.4. Native Model "Has Many" Related Foreign Records

4.4.1. Setup

4.4.2. SQL for Lazy-Load

4.4.3. Foreign Key

4.4.4. Relationship Definition

4.5. Native Model "Belongs To" Related Foreign Model

4.5.1. Setup

4.5.2. SQL for Lazy-Load

4.5.3. Foreign Key

4.5.4. Relationship Definition

4.6. Native Model "Has Many" Related Foreign Records "Through" An Association

4.6.1. Setup

4.6.2. SQL for Lazy-Load

4.6.3. Foreign Key

4.6.4. Through Key

4.6.5. Relationship Definition

4.7. Eager Fetching

4.7.1. Setting Conditions for Eager Fetches

4.8. Creating, Modifying, and Saving Relateds

4.8.1. Automatic Foreign Key Management

4.8.2. Independent Operation