nh2 / aesonbson Goto Github PK
View Code? Open in Web Editor NEWMapping between Aeson's JSON and Bson objects
License: Other
Mapping between Aeson's JSON and Bson objects
License: Other
Aeson 0.8.0.0 seems to have no instance for ToJSON Data.ByteString.Internal.ByteString
.(maybe 0.7.0.0 doesn't have.)
So, I got an error below,
Data/AesonBson.hs:50:39:
No instance for (ToJSON Data.ByteString.Internal.ByteString)
arising from a use of ‘toJSON’
In the expression: toJSON binary
In an equation for ‘aesonifyValue’:
aesonifyValue (Bin (Binary binary)) = toJSON binary
Failed, modules loaded: none.
Should I add an instance declaration of ToJSON Data.ByteString.Internal.ByteString
by myself?
As of Aeson 0.7, the scientific package is now a dependency. So Attoparsec's Number is no longer used, but need to do something like:
bsonifyValue (Number n) = case base10Exponent n == 0 of { True -> Int64 $ fromIntegral $ coefficient n
; False -> Float $ (fromRational . toRational) n }
The code snippet above isn't quite right, however, because the scientific
does not guarantee that if base10Exponent is 0 then it's an integer, so more careful conversion is needed.
Hello there,
are you still maintaining this project or you plan to upload it on Hackage?
Cheers!
Alfredo
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