Rakenne is a database modeling tool for command line written in Crystal.

For now, It is a toy project to improve author's skills with the language and its various libraries. It is not supposed to work (yet). Please don't use it in production. ⚠️

Note: rakenne means structure in Finnish.

Roadmap

• provide a DSL for modeling database
  • describe entity-relationship diagrams (ERD) using MERISE notation
  • describe physical diagrams (PD)
• provide a command-line tool for all operations
• render models into diagrams
  • ERD to MERISE MCD diagrams
  • ERD to Chen notation diagrams
  • PD to MERISE MLD diagrams
• validate model
• convert across different database reprentations
  • to convert ERD to PD
  • to convert PD to database specific SQL
  • to reverse-engineer database-specific SQL to PD
  • to reverse-engineer PD to ERD
• support multiple physical models
  • sql
  • nosql
• support multiple SQL and NoSQL languages
  • SQL: postgresql
  • SQL: mariadb
  • NoSQL: redis
  • NoSQL: mongodb
  • NoSQL: cassandra CQL

References

• https://en.wikipedia.org/wiki/Entity%E2%80%93relationship_model
• https://www.lucidchart.com/pages/er-diagrams
• https://www.youtube.com/watch?v=LR0Ip5Jenbk