| Safe Haskell | None |
|---|---|
| Language | Haskell2010 |
Hasura.Backends.Postgres.Instances.Types
Contents
Description
Postgres Instances Types
Defines a Backend type class instance for Postgres.
Synopsis
- class (Representable (PgExtraTableMetadata pgKind), ToJSON (PgExtraTableMetadata pgKind), FromJSON (PgExtraTableMetadata pgKind)) => PostgresBackend (pgKind :: PostgresKind) where
- type PgExtraTableMetadata pgKind :: Type
Documentation
class (Representable (PgExtraTableMetadata pgKind), ToJSON (PgExtraTableMetadata pgKind), FromJSON (PgExtraTableMetadata pgKind)) => PostgresBackend (pgKind :: PostgresKind) Source #
This class is an implementation detail of Backend.
Some types of Backend differ across different Postgres "kinds". This
class alllows each "kind" to specify its own specific implementation. All
common code is directly part of the Backend instance.
Note: Users shouldn't ever put this as a constraint. Use `Backend ('Postgres pgKind)` instead.
Associated Types
type PgExtraTableMetadata pgKind :: Type Source #