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Add a test for a many-to-many query with LEFT OUTER JOINs.

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Felipe Lessa 2012-09-05 16:58:27 -03:00
parent 0c694e92a5
commit 80227e120e
1 changed files with 23 additions and 0 deletions
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test/Test.hs
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@ -260,6 +260,29 @@ main = do
, (p4e, f42, p2e)
, (p2e, f21, p1e) ]
it "works for a many-to-many explicit join with LEFT OUTER JOINs" $
run $ do
p1e@(Entity p1k _) <- insert' p1
p2e@(Entity p2k _) <- insert' p2
p3e <- insert' p3
p4e@(Entity p4k _) <- insert' p4
f12 <- insert' (Follow p1k p2k)
f21 <- insert' (Follow p2k p1k)
f42 <- insert' (Follow p4k p2k)
f11 <- insert' (Follow p1k p1k)
ret <- select $
from $ \(follower `LeftOuterJoin` mfollows `LeftOuterJoin` mfollowed) -> do
on $ mfollowed ?. PersonId ==. mfollows ?. FollowFollowed
on $ just (follower ^. PersonId) ==. mfollows ?. FollowFollower
orderBy [ asc ( follower ^. PersonName)
, asc (mfollowed ?. PersonName) ]
return (follower, mfollows, mfollowed)
liftIO $ ret `shouldBe` [ (p1e, Just f11, Just p1e)
, (p1e, Just f12, Just p2e)
, (p4e, Just f42, Just p2e)
, (p3e, Nothing, Nothing)
, (p2e, Just f21, Just p1e) ]
describe "select/orderBy" $ do
it "works with a single ASC field" $