Simple package for describing SQLAlchemy schema and display raw database tables. Relation detecting by ForeignKey columns. Supports mapped class inherit. BSD licensed.

Output formats:

• PlantUML class diagram
• DOT graphviz directed graphs

• python >= 2.5
• SQLAlchemy >= 0.5

pip install sadisplay

From bitbucket:

pip install http://bitbucket.org/estin/sadisplay/get/tip.tar.gz
# or
easy_install http://bitbucket.org/estin/sadisplay/get/tip.tar.gz

SQLAlchemy model:

Write simple script in your project environment:

import sadisplay
from yourapp import model

desc = sadisplay.describe([getattr(model, attr) for attr in dir(model)])
open('schema.plantuml', 'w').write(sadisplay.plantuml(desc))
open('schema.dot', 'w').write(sadisplay.dot(desc))

# Or only part of schema
desc = sadisplay.describe([model.User, model.Group, model.Persmission])
open('auth.plantuml', 'w').write(sadisplay.plantuml(desc))
open('auth.dot', 'w').write(sadisplay.dot(desc))

Render PlantUML class diagram:

$ java -jar plantuml.jar schema.plantuml

# or for svg format
$ java -jar plantuml.jar -Tsvg schema.plantuml

Render graph by graphviz:

$ dot -Tpng schema.dot > schema.png

Also you can display you sql database tables by reflecting feature:

$ sadisplay -u <URL connection string to db> -r dot > schema.dot
$ dot -Tpng schema.dot > schema.png