{-# LANGUAGE EmptyDataDecls #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE GADTs #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE QuasiQuotes #-}
{-# LANGUAGE TemplateHaskell #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE UndecidableInstances #-}
module CustomConstraintTest where
import PgInit
import qualified Data.Text as T
share [mkPersist sqlSettings, mkMigrate "customConstraintMigrate"] [persistLowerCase|
CustomConstraint1
some_field Text
deriving Show
CustomConstraint2
cc_id CustomConstraint1Id constraint=custom_constraint
deriving Show
|]
specs :: (MonadIO m, MonadFail m) => RunDb SqlBackend m -> Spec
specs runDb = do
describe "custom constraint used in migration" $ do
it "custom constraint is actually created" $ runDb $ do
runMigration customConstraintMigrate
runMigration customConstraintMigrate -- run a second time to ensure the constraint isn't dropped
let query = T.concat ["SELECT DISTINCT COUNT(*) "
,"FROM information_schema.constraint_column_usage ccu, "
,"information_schema.key_column_usage kcu, "
,"information_schema.table_constraints tc "
,"WHERE tc.constraint_type='FOREIGN KEY' "
,"AND kcu.constraint_name=tc.constraint_name "
,"AND ccu.constraint_name=kcu.constraint_name "
,"AND kcu.ordinal_position=1 "
,"AND ccu.table_name=? "
,"AND ccu.column_name=? "
,"AND kcu.table_name=? "
,"AND kcu.column_name=? "
,"AND tc.constraint_name=?"]
[Single exists] <- rawSql query [PersistText "custom_constraint1"
,PersistText "id"
,PersistText "custom_constraint2"
,PersistText "cc_id"
,PersistText "custom_constraint"]
liftIO $ 1 @?= (exists :: Int)