Backend Models

Define typed ORM models with relationships, constraints, validation across languages.

Updated Jan 15, 2026

Search Tags:#validation #models #orm #constraints #relationships #databases #define

Ready to run

npx skills add https://github.com/dpietersz/pietersz.me --skill backend-models-dpietersz

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: Backend Models
Source: https://github.com/dpietersz/pietersz.me/tree/main/.claude/skills/backend-models
Command: npx skills add https://github.com/dpietersz/pietersz.me --skill backend-models-dpietersz

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Define consistent, well-typed ORM models with clear relationships.

Core Features & Use Cases

Design and validate ORM models across languages (Ruby, Python, TypeScript, Java) with clear naming, types, constraints, and documentation.
Define relationships (has_many, belongs_to, many-to-many), cascade behaviors, foreign keys, and index strategies.
Enforce timestamps, data validation, and database constraints across model definitions.
Use Case: when creating or editing model files (models/.rb, models/.py, .model.ts, entities/.java) in a project.

Quick Start

Create a new User model with fields id, name, email, and timestamps, ensuring proper validation and a foreign key to roles.

Frequently Asked Questions about Backend Models

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I define ORM models with proper relationships and constraints?▼

Defining ORM models involves establishing clear table structures, relationships, constraints, and indexes to ensure data integrity. This process covers foreign keys, timestamps, validation, and cascade behaviors across multiple programming languages.

Can I use this to define ORM models across different programming languages?▼

Yes, you can design and validate ORM models across Ruby, Python, TypeScript, and Java. It ensures clear naming, typing, constraints, and documentation for model files within those environments.

What is the best way to configure cascade behaviors and foreign keys in database models?▼

Configuring cascade behaviors and foreign keys requires explicitly defining relationship rules like has_many or belongs_to. This ensures referential integrity is maintained during data updates and deletions.

How do I enforce data validation and timestamps when creating ORM model files?▼

Enforcing data validation and timestamps involves applying built-in framework constraints to table definitions. This ensures consistent data types, required fields, and automated tracking of record creation and updates.

Does this approach support many-to-many relationships and index strategies?▼

Yes, this approach supports defining many-to-many relationships and implementing index strategies. It allows you to scope requirements for table structures, foreign keys, and constraints to optimize database queries and data retrieval.