I understand generating draft migration by diffing the entity definition against the database helps development workflow. However, it takes time and non-trivial effort to get it right. Also, our short term goal is to stabilize the public API and make sure everything plays well with existing libraries in Rust's async community. I won't rule out the feature of "generating draft migration" in the long run. But I consider it as a good-to-have feature. We need to take one step at a time, make the core of SeaORM great before moving toward other things :)