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FROWNINGdev/django-orm-lens

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Free, MIT alternative to paid Django schema review. Blast radius on every PR, schema drift, N+1 across functions, ER diagrams, MCP server. No DB, no Django boot, no Pro tier.

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FROWNINGdev/django-orm-lens

Added 3 Sept 2026

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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

Clients listed in this record (not verified here)

Claude Code, Cursor, Windsurf, Continue, VS Code

Notes

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

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
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