Emberjs Data Model Migration Guide

This guide covers migrating Ember Data models from the legacy syntax to the modern one.

Useful docs:

• Example of old Model
• Example of new Model

Table of Contents

1. Overview
2. Basic Migration Pattern
3. Attributes Migration
4. Relationships Migration
5. Computed Properties Migration
6. Testing Migrated Models
7. Complete Example
8. Best Practices

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Overview

The migration involves converting from:

• DS.Model.extend({...}) → export default class ModelName extends Model
• attr() → @attr() decorator
• belongsTo() → @belongsTo() decorator
• hasMany() → @hasMany() decorator

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Basic Migration Pattern

Before (Legacy Syntax)

After (Modern Syntax)

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Attributes Migration

Simple Attributes

Attributes with Default Values

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Relationships Migration

BelongsTo Relationships

HasMany Relationships

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Computed Properties Migration

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Testing Migrated Models

Basic Test Setup

Testing Attributes

Testing Computed Properties

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Complete Example

Before (Legacy Model)

After (Modern Model)