aeson-0.10.0.0 - encoding of UTCTime values

[epsilonhalbe]

I experience a problem in the Hackage edition of aeson 0.10.0.0

If I take the following expression

Prelude > import Data.Aeson
Prelude Data.Aeson > import Data.Time
Prelude Data.Aeson Data.Time > x <- getCurrentTime
Prelude Data.Aeson Data.Time > decode (encode [x]) :: Maybe [UTCTime]
Nothing

while the current Master succeeds.

Funny enough if you fix the test suite (see #312) by copying the missing files the test suite reports an OK.

a minimal test property (in the style of tasty) could be

prop_encode_decode = testProperty "encoding -> decoding for UTCTime" $ \x -> Just ([x :: UTCTime]) == decode (encode [x])

[dzhus]

Can confirm, UTCTime is not properly quoted:

Data.Aeson Data.Time> encode now
"2015-11-09T19:15:53.295211Z"

(It should be "\"2015-11-09T19:15:53.295211Z\"" instead)

[dzhus]

I believe it was fixed in 0b98185. Can we see a release please?

[epsilonhalbe]

I checked with manual escaping everything works fine

Prelude > :set -XOverloadedStrings
Prelude > import Data.Aeson as A
Prelude Data.Aeson > import Data.Time
Prelude Data.Aeson Data.Time > import Data.Monoid
Prelude Data.Aeson Data.Time Data.Monoid > x <- getCurrentTime
Prelude Data.Aeson Data.Time Data.Monoid > decode ("[\""<>encode x<>"\"]") :: Maybe [UTCTime]
Just [2015-11-10 08:52:21.21633 UTC]

[jkr]

Might not be the best venue for this, but is there any easy way to work around this issue until a new release comes out? I'm currently just wrapping data UTCTime' = UTCTime' UTCTime and defining an instance on that with the default and constructTagModifier wrapping it in quotes. This just seemed like the easiest to remove when a new release comes out. But is there some more straightforward approach I'm missing?

[jkr]

... or, I suppose, just hold the version at <0.10 in the cabal file. That seems to work. Sorry for the noise.

[epsilonhalbe]

@jkr - or you can just use this version on github - that seems to work allright

[bos]

I'm going to close this as it's fixed. Sorry for the inconvenience. 0.11 will be out hopefully by the end of the month.