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fix(assign-submissions): avoid division by zero

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This commit is contained in:
Gregor Kleen 2019-10-20 11:02:32 +02:00
parent e4788d8f11
commit 640326ca5d
1 changed files with 5 additions and 1 deletions
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6
src/Handler/Utils/Submission.hs
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@ -197,6 +197,10 @@ planSubmissions sid restriction = do
proportionSum = getSum . foldMap corrProportion . fromMaybe Map.empty $ correctors !? sheetId
where corrProportion (_, CorrectorExcused) = mempty
corrProportion (Load{..}, _) = Sum byProportion
relativeProportion :: Rational -> Rational
relativeProportion prop
| proportionSum == 0 = 0
| otherwise = prop / proportionSum
extra
| Just (Load{..}, corrState) <- correctors !? sheetId >>= Map.lookup corrector
= sum
@ -208,7 +212,7 @@ planSubmissions sid restriction = do
return . negate . fromIntegral . Map.size $ Map.filter (\(mCorr, tutors, sheetId') -> mCorr == Just corrector && sheetId == sheetId' && Map.member corrector tutors) submissionState
, fromMaybe 0 $ do
guard $ corrState /= CorrectorExcused
return . negate $ (byProportion / proportionSum) * fromIntegral sheetSize
return . negate $ relativeProportion byProportion * fromIntegral sheetSize
]
| otherwise
= assigned