Backend Models

Define database models and ORM entities with relationships and constraints.

Updated Aug 11, 2023
One-click install
npx skills add https://github.com/EIS-ITS/vss-cli --skill backend-models-eis-its
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: Backend Models
Source: https://github.com/EIS-ITS/vss-cli/tree/main/.claude/skills/backend-models
Command: npx skills add https://github.com/EIS-ITS/vss-cli --skill backend-models-eis-its

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill prevents data integrity issues and complex queries that arise from inconsistent or poorly defined database models. It guides you in creating well-structured, validated, and properly related database models, ensuring your data is reliable and easy to work with.

Core Features & Use Cases

  • Data Integrity: Enforce validation rules and database constraints at the model level.
  • Clear Relationships: Define one-to-many, many-to-many, and other relationships accurately.
  • Naming Conventions: Apply consistent naming for models, attributes, and relationships.
  • Use Case: When creating a new Product model, use this skill to define its attributes, establish relationships to Category and Order models, and add validation rules for price and stock quantity, ensuring data consistency across the application.

Quick Start

Design a new Order model for a backend application, including relationships to User and Product models, and add validation for order status.

Frequently Asked Questions about Backend Models

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

FAQPage Schema
How do I define database models with validation and constraints?

Define database models by specifying attributes with appropriate data types, adding validation rules at the model level, and enforcing database constraints like NOT NULL, UNIQUE, and foreign keys. This ensures data integrity and prevents invalid data from entering your database across ORM frameworks like SQLAlchemy, Sequelize, Prisma, and ActiveRecord.

What's the best way to set up relationships between database models?

Establish relationships by defining belongs_to, has_many, and many-to-many associations between models, configuring foreign keys and cascade behaviors appropriately. This creates clear data relationships and enables efficient queries without manual joins or data duplication.

How do I apply naming conventions to models and database schemas?

Apply consistent naming conventions for model classes, table names, attributes, and relationships following your framework's standards. Consistent naming reduces confusion, improves code readability, and ensures your schema aligns with team practices and ORM expectations.

Can I use database indexes and timestamps with ORM models?

Yes, ORM frameworks support adding indexes to improve query performance and automatically managing timestamp fields like created_at and updated_at. Configure these at the model level to optimize database operations and track data changes automatically.

Why should I define validation rules in my models instead of only in the application layer?

Model-level validation enforces data integrity rules directly in the database, protecting against invalid data even if application logic is bypassed. This provides a safety net and ensures consistency across all applications accessing the same database.