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Migration with is not idempotent when combining default=null and Maybe type #1534

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Migration with is not idempotent when combining default=null and Maybe type #1534

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11 changes: 11 additions & 0 deletions persistent-test/src/MigrationTest.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -36,6 +36,13 @@ Source1 sql=source
field4 Target1Id
|]

share [mkPersist sqlSettings, mkMigrate "migrationWithDefaultMaybeText"] [persistLowerCase|
TextMaybeDefault
field1 Int
field2 T.Text Maybe default=null
deriving Eq Show
|]

specsWith :: (MonadUnliftIO m) => RunDb SqlBackend m -> Spec
specsWith runDb = describe "Migration" $ do
it "is idempotent" $ runDb $ do
Expand All @@ -53,3 +60,7 @@ specsWith runDb = describe "Migration" $ do
void $ runMigrationSilent migrationAddCol
again <- getMigration migrationAddCol
liftIO $ again @?= []
fit "is idempotent (default text example)" $ runDb $ do
void $ runMigrationSilent migrationWithDefaultMaybeText
again <- getMigration migrationWithDefaultMaybeText
liftIO $ again @?= ["ALTER TABLE \"text_maybe_default\" ALTER COLUMN \"field2\" SET DEFAULT null"]
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@danbroooks danbroooks May 22, 2024 •
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In this case, the test should be:

liftIO $ again @?= []

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