FROWNINGdev/django-orm-lens

Overview

Free, MIT licensed alternative to paid Django schema review. It analyzes Django ORM code to determine blast radius on every PR, detect schema drift, find N+1 queries across functions, and generate ER diagrams. Includes an MCP server and does not require a database or Django boot, with no Pro tier.

Best for

Best for
Python developers who want free Django schema review in CI

Use cases

• Review pull requests for ORM-related blast radius
• Detect schema drift and N+1 query patterns
• Generate ER diagrams from Django models

How to use

Install

uvx django-orm-lens scan      # or: pipx run django-orm-lens scan

Tools exposed

• list_apps
• list_models
• describe_model
• find_relations
• cascade_preview
• er_diagram
• describe_migration_dependency
• suggest_indexes
• signal_graph
• nplusone_scan
• Boot-and-graph

Tested with

Claude Code, Cursor, Windsurf, Continue, VS Code

Notes

Free, MIT licensed alternative to paid Django schema review. It analyzes Django ORM code to determine blast radius on every PR, detect schema drift, find N+1 queries across functions, and generate ER diagrams. Includes an MCP server and does not require a database or Django boot, with no Pro tier.

73 stars on GitHub. Last updated 2026-09-02. Licensed MIT.

Use cases

• Review pull requests for ORM-related blast radius
• Detect schema drift and N+1 query patterns
• Generate ER diagrams from Django models

Pros

• Free and MIT licensed
• No database setup or Django boot required
• Provides ER diagrams and an MCP server

Cons

• Small community with only 73 stars
• Limited to Django ORM projects
• No commercial support or paid tier

Indexed from awesome-mcp-servers-punkpeye and enriched against its public facts.