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 very early stage and 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