Django Model Visualizer (VS Code Extension)

Visualize Django model relationships and get quick model-level performance hints.

Features

• Parse all models.py files in the current workspace (excluding migrations).
• Generate relationship graph for:
  • ForeignKey
  • OneToOneField
  • ManyToManyField
• Export ER diagram as Mermaid (.mmd / .md).
• Bonus analysis:
  • Detects risky FK indexing overrides (db_index=False on FK).
  • Suggests likely missing indexes for query-heavy fields.
  • Suggests select_related() / prefetch_related() usage patterns.

Commands

• Django Model Visualizer: Open Relationship Graph
• Django Model Visualizer: Export ER Diagram
• Django Model Visualizer: Analyze Model Performance

Run Locally

1. Install dependencies:

npm install

2. Build:

npm run compile

3. Press F5 in VS Code to launch Extension Development Host.

Notes

• The parser is heuristic (regex + indentation-aware blocks) and targets common Django model styles.
• Very dynamic model definitions and heavily multi-line field declarations may require parser enhancements.