persistBackend -package:persistent

persistBackend :: HasPersistBackend backend => backend -> BaseBackend backend
esqueleto Database.Esqueleto Database.Esqueleto.Experimental Database.Esqueleto.Legacy, persistent-mtl Database.Persist.Sql.Shim, hledger-web Hledger.Web.Import
class () => HasPersistBackend backend
esqueleto Database.Esqueleto Database.Esqueleto.Experimental Database.Esqueleto.Legacy, persistent-mtl Database.Persist.Sql.Shim
Class which allows the plucking of a BaseBackend backend from some larger type. For example, instance HasPersistBackend (SqlReadBackend, Int) where type BaseBackend (SqlReadBackend, Int) = SqlBackend persistBackend = unSqlReadBackend . fst
class HasPersistBackend backend => IsPersistBackend backend
esqueleto Database.Esqueleto Database.Esqueleto.Experimental Database.Esqueleto.Legacy, persistent-mtl Database.Persist.Sql.Shim, hledger-web Hledger.Web.Import
Class which witnesses that backend is essentially the same as BaseBackend backend. That is, they're isomorphic and backend is just some wrapper over BaseBackend backend.
type family YesodPersistBackend site
yesod-persistent Yesod.Persist.Core, hledger-web Hledger.Web.Import
stPersistBackends :: PersistentTCState -> [Backend_boot TCM]
Agda Agda.Compiler.Backend Agda.TypeChecking.Monad.Base
Current backends with their options
class HasPersistBackend backend
hledger-web Hledger.Web.Import
Class which allows the plucking of a BaseBackend backend from some larger type. For example, instance HasPersistBackend (SqlReadBackend, Int) where type BaseBackend (SqlReadBackend, Int) = SqlBackend persistBackend = unSqlReadBackend . fst