Cannot JSON convert data arrays with NA

[disleyland]

cannot JSON convert any data arrays with NA.

JSON.json(@data [1,2,NA]) used to produce "[1,2,{}]" but now produces the error "Cannot serialize type DataArrays.NAtype"

guessing this is because the vector syntax {} is now discontinued

is there a workaround? or before converting do we have to manually convert all data arrays to nothing or "" ?

This issue was reported in JSON.jl.

[nalimilan]

Hmm, serialization seems to work fine, so I'm not sure what's the problem. Will ask upstream.

using DataArrays
x=@data [1,2,NA]
io=IOBuffer()
serialize(io, x)
seekstart(io)
deserialize(io)

[TotalVerb]

As a workaround you can just write

try JSON.lower(NA) catch
    JSON.lower(::DataArrays.NAtype) = nothing
end

in your own code for now. This is type piracy and not a good long term solution, but the try/catch ensures that it will only add the definition if it doesn't already exist.

[ararslan]

A slightly nicer (though basically equivalent) workaround:

if !applicable(JSON.lower, NA)
    JSON.lower(::NAtype) = nothing
end