Using an ORM to save data to a database

Opinions about object-relational mappers vary considerably: their use was strongly encouraged when SQL databases stored all of the World's data but they quickly fell out of favor when it was actually the whole World's data. Typically these frameworks provide a trade-off between ease of use, language integration, and scalability. While it's true that querying terabytes of data requires a fundamentally different approach, simple CRUD-type business applications work well with frameworks that do the heavy lifting for you and—most importantly—are somewhat independent of the actual database they connect to. Rust's macros come in very handy here—they allow the ORM framework to do these things largely at compile time, so it's memory-safe, type-safe, and fast. Let's see how it's done.

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