persistent

Type-safe, multi-backend data serialization. http://www.yesodweb.com/book/persistent

Version on this page:2.1.1.3
LTS Haskell 12.22:2.8.2
Stackage Nightly 2018-12-10:2.9.0
Latest on Hackage:2.9.0

See all snapshots persistent appears in

MIT licensed by Michael Snoyman
Maintained by Michael Snoyman, Greg Weber

Module documentation for 2.1.1.3

There are no documented modules for this package.

persistent

Type-safe, data serialization. You must use a specific backend in order to make this useful. For more information, see the chapter in the Yesod book.

Changes

Changelog for persistent

2.9.0

  • Added support for SQL isolation levels to via SqlBackend. [#812]
  • Move Database.Persist.Sql.Raw.QQ to a separate persistent-qq package #827
  • Fix 832: repsertMany now matches mapM_ (uncurry repsert) and is atomic for supported sql back-ends.

2.8.2

  • Added support for sql= to the unique constraints quasi-quoter so that users can specify the database names of the constraints.

2.8.1

  • DRY-ed up and exposed several util functions in Database.Persist.Sql.Util.
    • Upstream-ed updatePersistValue, mkUpdateText, and commaSeparated from Database.Persist.MySQL.
    • De-duplicated updatePersistValue from various Database.Persist.Sql.Orphan.* modules.
  • Batching enhancements to reduce db round-trips.
    • Added getMany and repsertMany for batched get and repsert.
    • Added putMany with a default/slow implementation. SqlBackend’s that support native UPSERT should override this for batching enhancements.
    • Updated insertEntityMany to replace slow looped usage with batched execution.
  • See #770

2.8.0

  • Switch from MonadBaseControl to MonadUnliftIO
  • Reapplies #723, which was reverted in version 2.7.3.

2.7.3.1

  • Improve error messages when failing to parse database results into Persistent records. #741
  • A handful of fromPersistField implementations called error instead of returning a Left Text. All of the implementations were changed to return Left. #741
  • Improve error message when a SQL insert fails with a custom primary key #757

2.7.3

  • Reverts #723, which generalized functions using the BackendCompatible class. These changes were an accidental breaking change.
  • Recommend the PersistDbSpecific docs if someone gets an error about converting from PersistDbSpecific

2.7.2 [DEPRECATED ON HACKAGE]

  • Many of the functions have been generalized using the BackendCompatible class. #723
    • This change was an accidental breaking change and was reverted in 2.7.3.
    • These change will be released in a future version of Persistent with a major version bump.
  • Add raw sql quasi quoters #717

2.7.1

  • Added an insertUniqueEntity function #718
  • Added BackendCompatible class #701

2.7.0

  • Fix upsert behavior #613
  • Atomic upsert query fixed for arithmatic operations #662
  • Haddock and test coverage improved for upsert

2.6.1

  • Fix edge case for \<-. [Nothing]
  • Introduce connMaxParams
  • Add ‘getJustEntity’ and ‘insertRecord’ convenience function
  • Minor Haddock improvment

2.6

  • Add connUpsertSql type for providing backend-specific upsert sql support.

2.5

  • read/write typeclass split
  • add insertOrGet convenience function to PersistUnique

2.2.4.1

  • Documentation updates #515

2.2.4

  • Workaround for side-exiting transformers in runSqlConn #516

2.2.3

  • PersistField instance for Natural
  • better oracle support in odbc

2.2.2

  • Add liftSqlPersistMPool function
  • support http-api-data for url serialization

2.2.1

  • Migration failure message with context
  • Fix insertKey for composite keys

2.2

  • Add a RawSql instance for Key. This allows selecting primary keys using functions like rawSql. #407
  • SqlBackend support for an optimized insertMany

2.1.6

Important! If persistent-template is not upgraded to 2.1.3.3 you might need to make sure Int64 is in scope for your model declarations.

  • add showMigration function
  • explicitly use Int64 for foreign key references

2.1.5

Add dbIdColumnsEsc to Sql.Utils. Used in persistent-postgresql 2.1.5.2

2.1.4

  • Fix getBy with a primary key. #342

2.1.3

  • Break self-referencing cycles in the entity declarations

2.1.2

  • Error with Doubles without a decimal part #378
  • runSqlPool does not perform timeout checks.

2.1.1.6

  • One extra feature for #939: use logDebugN instead

2.1.1.5

2.1.1.3

Parse UTCTime in 8601 format #339

2.1.1.1

Support for monad-control 1.0

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