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Cannot convert an object of type DataValues.DataValue{Any} to an object of type DateTime #1478

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IanButterworth opened this issue Aug 11, 2018 · 1 comment
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Cannot convert an object of type DataValues.DataValue{Any} to an object of type DateTime #1478

IanButterworth opened this issue Aug 11, 2018 · 1 comment

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@IanButterworth
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I’m stuck with new Julia 0.7/1.0 DataFrames functionality. I have dataframe df where column 1 is an array of DataValues.DataValue{Any}.

How can I convert it to DateTime, and allow for missing?

This doesn’t work:

datetimes = convert(Vector{Union{DateTime,Missing}}, df[1])

MethodError: Cannot `convert` an object of type DataValues.DataValue{Any} to an object of type DateTime
@IanButterworth IanButterworth mentioned this issue Aug 11, 2018
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@nalimilan
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DataValue entries should never appear in a data frame. That's probably a bug in the Queryverse package you used to import the data.

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@nalimilan @IanButterworth