Fat Controller

Kind: anti-pattern

Layer: Enforcement Core

Record: architecture:fat-controller

Severity: discouraged

Scope: correctness_verification, security_governance, control_coordination

Formed by: Put validation, business rules, persistence orchestration, mapping, authorization, and response formatting in the controller layer.

Canonical: Ontology

A defect in which controllers hold validation, business rules, persistence and response formatting.

Listed in Architecture principles, after Transaction Script Sprawl and before Repository Dump.

Refactored by

• Extract Use Case
• Move Logic to the Domain
• Map to Domain Model

Severity

• discouraged

Category

• Anti-patterns

Force

• Control coordination
• Correctness verification
• Security governance

Violates

• Domain-Driven Design
• Domain Service

Negated by

• Domain Service

Linked from

• Anti-patterns
• Domain Architecture
• Domain Architecture
• Severity levels
• The forces