The code is working fine it takes list of maps convert them into csv and export the value. This is the code def to_csv(map, path) do file = File.open!(path, [:write, :utf8]) map |> IO.inspect() |> CSV.encode(headers: true) |> Enum.each(&IO.write(file, &1)) end This is the list of maps …

Which library are you using for CSV export?

That uses to_string/1 to encode anything but a BitString. So you probably hit a charlist issue here. You need to preprocess your data properly to make it encodable.

Thanks for your answer. I just went with using map instead of list for category_id and encode it with poison. It seems to work

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Nested list value inside map csv export

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script January 19, 2019, 11:50am 3

https://github.com/beatrichartz/csv