What is SeaORM MockDatabase?

In-memory fake DB for unit tests . Fill with query results upfront. No real Postgres spins.

How to mock SeaORM updates and saves?

Append two model arrays: one for find, one for save/update. active_model.save expects the post-change model.

Yes, but use BTreeMap per row. Prefix joined table fields. Nested? Derive and pray.

SeaORM's MockDatabase promises painless unit testing. Reality? A scavenger hunt through StackOverflow. Here's the unvarnished truth.

theAIcatchup Apr 10, 2026 3 min read

SeaORM MockDatabase requires pre-filling results — docs cover basics, ignore the rest. 𝕏
Partial models and joins demand BTreeMaps with precise field mapping. 𝕏
Better docs needed, or Rust devs stick to sqlx for testing sanity. 𝕏

Published by

Community-driven. Code-first.

#MockDatabase #ORM mocking #Rust testing #Rust unit testing #SeaOrm #database mocking #mock-database #unit testing ORM #unit tests

Get the best Open Source stories of the week in your inbox — no noise, no spam.

Originally reported by Dev.to