Zach Daniel @zachdaniel.dev · Apr 13 #AshFramework atomic updates are extremely powerful. When you add a where: [changing(:name)] condition, in an atomic context it compiles into the UPDATE statement itself. The condition becomes a CASE expression in SQL. One atomic query. #ElixirLang
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This composes further. Validations work the same way. The validation becomes an expression. The whole action: conditional changes, conditional validations, policies, one trip to the database. We even use savepoints to ensure errors have the same transaction semantics. 😎