Page 9 - Design Patterns

AI generated

Deep Equality Without an External Library: Writing Your Own Comparison Function

Maxim Mironjuk - September 16, 2025

=== only compares objects by reference identity, and JSON.stringify fails on key order, maps, sets and dates. A hand written deep equality function compares values recursively by structure instead of reference and covers exactly the data types the simple approaches regularly fail on.

Symfony Design Patterns

AI generated

Event Driven Microservices with Symfony Messenger

Maxim Mironjuk - September 14, 2025

Event driven microservices replace synchronous REST calls between services with asynchronous integration events distributed through Symfony Messenger onto a shared broker. This article shows how the transactional outbox pattern solves the dual write problem, how consumers stay idempotent, how event schemas can be versioned, and when a saga orchestrator becomes necessary for distributed business processes.

Magento PHP Design Patterns

AI generated

Service Locator & ObjectManager in Magento 2

Maxim Mironjuk - September 12, 2025

mironsoft.de › Blog › Design Patterns

Magento 2 · Design Patterns

Service Locator &
ObjectManager in Magento 2

The ObjectManager is the Service Locator pattern in Magento 2, and at the same time the platform's best known anti-pattern. This article explains why using it directly in production code is forbidden, which exceptions are legitimate, and what correct Dependency Injection looks like.

13 min read PHP 8.4 Magento 2.4.8

Table of Contents

What is the Service Locator pattern?
The role of the ObjectManager in Magento 2
Why ObjectManager::getInstance() is an anti-pattern
SOLID principles and how ObjectManager violates them
Legitimate exceptions: when the ObjectManager is allowed
The right way: Constructor Injection in PHP 8.4
Factories instead of ObjectManager::create()
Mocking and refactoring the ObjectManager in unit tests
Recognizing and fixing typical code smells
Summary
FAQ

What is the Service Locator pattern?

The Service Locator pattern is a design pattern for resolving dependencies

SQL Design Patterns

AI generated

Soft Deletes: A Modeling Guide

Maxim Mironjuk - September 07, 2025

A soft delete marks a row as deleted without physically removing it, sounds like a single extra column, and turns out in practice to be a source of unique constraint conflicts, bloated indexes, and forgotten WHERE clauses. This post shows three established models for soft deletes and explains when each one truly fits.

Alpine.js Design Patterns

AI generated

Structuring Multi-Field Validation Groups in Alpine.js

Maxim Mironjuk - September 07, 2025

Anyone validating a checkout form with shipping and billing addresses, payment data, and contact fields against a single global error object quickly loses the overview. A well designed validation group per business section makes errors visible per area, keeps Alpine components maintainable, and helps screen reader users orient themselves inside the form.

Magento PHP Design Patterns

AI generated

Active Record Pattern in Magento 2

Maxim Mironjuk - September 02, 2025

mironsoft.de › Blog › Design Patterns

Magento 2 · Design Patterns

Active Record Pattern
in Magento 2

The Active Record Pattern combines database access and business logic in a single object. Magento 2 is historically built on it, yet modern Magento 2.4.8 clearly favors the Repository Pattern. Why that is, which bugs are typical, and how the migration succeeds.

15 min read PHP 8.4 Magento 2.4.8

Table of Contents

The Active Record Pattern: origin and definition
Active Record in Magento 2: Model and ResourceModel
The deliberate separation: Model vs. ResourceModel
Why Active Record is an anti-pattern
Typical bugs and performance problems
Data Mapper as a conceptual alternative
The Repository Pattern in Magento 2
Migrating from Active Record to Repository
Summary
FAQ

The Active Record Pattern: origin and definition

The Active Record Pattern was described by Martin Fowler in his 2002 book "Patterns of Enterprise Application Architecture" and has shaped web development ever since. The core idea

Magento PHP Design Patterns

AI generated

Injectable & Virtual Types in Magento 2

Maxim Mironjuk - September 02, 2025

mironsoft.de › Blog › Design Patterns

Magento 2 · Design Patterns

Injectable & Virtual Types
in Magento 2

Why can a Product object not be injected directly via the constructor, yet a ProductRepository can? The distinction between Injectable and Non-Injectable Objects is fundamental to Magento 2 DI. Virtual Types elegantly solve a common di.xml problem on top of that.

15 min read PHP 8.4 Magento 2.4.8

Table of Contents

What are Injectable Objects?
What are Non-Injectable Objects?
Factories: the right way to handle Non-Injectable Objects
Shared vs. Non-Shared instances
Virtual Types in di.xml: concept and syntax
Practical example: a custom module logger via Virtual Type
Practical example: API clients with Virtual Types
Debugging DI problems
Summary
FAQ

What are Injectable Objects?

Injectable Objects are the foundation of Magento 2 dependency injection. The term describes classes that can be safely wired into other classes via constructor injection, because they are stateless or at least request-scoped

Claude AI Design Patterns

AI generated

Communication Patterns Between AI Agents

Maxim Mironjuk - August 29, 2025

As soon as several AI agents collaborate on a task, how they exchange information becomes the actual architecture decision. Communication patterns such as direct handoff, shared state, structured messaging and the blackboard pattern differ significantly in context consumption, coupling and error proneness, and the wrong choice quickly leads to context loss or conflicting intermediate states.

Claude AI Design Patterns

AI generated

Assessing Technical Debt with AI

Maxim Mironjuk - August 20, 2025

Assessing technical debt with AI means letting Claude systematically search the entire codebase for risk indicators, instead of relying on the gut feeling of individual developers. Claude finds outdated dependencies, missing tests in critical paths and architectural erosion, prioritizing by actual business risk instead of subjective annoyance.

JavaScript Design Patterns

AI generated

Web Components Without a Framework: Reusable UI Building Blocks in Plain JavaScript

Maxim Mironjuk - August 19, 2025

Web Components are a group of native browser APIs for building encapsulated UI building blocks that work without a framework runtime. Custom Elements, Shadow DOM and HTML Templates enable components that work equally well in React, Vue, Angular and plain HTML, a strong fit for design systems that span team and stack boundaries.