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doobie v0.7.0 Release Notes

Release Date: 2019-05-26 // almost 5 years ago

  • This is a compatibility-breaking release, although most source code should compile unmodified.

    The big changes are improvements in resource safety:

    • Replaced MonadError-based guarantee with bracket, which prevents potential resource leakage when using cancelable IO; and improves transactor resource safety by using Resource. The migration guide contains slightly more information. Thanks Sam Guymer for these updates!
    • ⚡️ Fragment concatenation and derived combinators like Fragments.in are now stacksafe, so you can now have gigantic IN clauses. This required API changes in Param, Fragment, Update[0] and Query[0] but these should not affect most users.

    🆕 New features:

    • At long last there is a doobie-quill module that allows constructing ConnectionIO values via Quill quotes. See the new book chapter for examples. Many thanks to Alex Ioffe and Chris Davenport for their assistance!

    And an assortment of other improvements:

    • Postgis has been upgraded to v2.3.0. Thanks Erlend Hamnaberg!
    • Added support for Scala 2.13.0-M5, many thanks to Sam Guymer for setting this up!
    • TypeTag constraint on Analyzable has been relaxed to WeakTypeTag. Thanks nigredo-tori!
    • New syntax allows .transact on OptionT and EitherT of ConnectionIO, rolling back in the failure cases. Thanks Julien Truffaut!
    • Postgres now supports arrays of Scala BigDecimal. Thanks Nicolas Rémond!
    • Most calls to throw have been replaced with raiseError, which allows doobie to work with effect types that don't catch. Thanks Sam Guymer!
    • Some things in the build were preventing doobie from cooperating with the community build. This has been fixed, thanks Seth Tisue!
    • Text[Char] instance was added for Postgres COPY FROM STDIN. Thanks Dermot Haughey!
    • You can now create a HikariTransactor from a HikariConfig. Thanks Yuriy Badalyantc!
    • Thanks to Harry Laoulakos and Daan Hoogenboezem for documentation updates!
    • Fragment combinators now parenthesize arguments so associativity in Scala is reflected in generated SQL. Thanks Katrix!