[R-pkg-devel] Warning 'as.data.frame.POSIXct()' is deprecated

[Tim Taylor]

Apologies - I've not had enough caffeine just yet. The reprex below 
highlights the issue but I think the code which implemented the change 
*may* need tweaking not lapply.

Tim

On 06/07/2023 09:26, Tim Taylor wrote:
> This *may* be an issue in lapply.  Let's see what others day. Reprex 
> below
>
> Sys.setenv("_R_CHECK_AS_DATA_FRAME_EXPLICIT_METHOD_" = TRUE)
> dat <- Sys.Date()
> as.data.frame(dat)
> #>          dat
> #> 1 2023-07-06
> lapply(dat, as.data.frame)
> #> Warning: Direct call of 'as.data.frame.Date()' is deprecated.  Use
> #> 'as.data.frame.vector()' or 'as.data.frame()' instead
> #> [[1]]
> #>       X[[i]]
> #> 1 2023-07-06
>
> Tim
>
> On 06/07/2023 08:54, Vincent van Hees wrote:
>> Dear all,
>>
>> I see the following warning in my package test results:
>>
>> ```
>> Warning
>> Direct call of 'as.data.frame.POSIXct()' is deprecated.  Use
>> 'as.data.frame.vector()' or 'as.data.frame()' instead
>> ```
>>
>> The warning is not always there and I struggle to make it 
>> reproducible. I
>> have encountered it in both Ubuntu 22.04 and in Windows 11, in both R 
>> 4.3.0
>> and 4.3.1, in both RStudio and in an GitHub Actions environment (example
>> <https://github.com/wadpac/GGIR/actions/runs/5463862340/jobs/9945096566>). 
>>
>> The warning gives the impression that I am doing something that R no 
>> longer
>> supports. However, I am not using the command as.data.frame.POSIXct()
>> anywhere directly in my code.
>>
>> When I dive into the code where the warnings occur I see patterns like:
>>
>> ```
>> now = Sys.time()
>> df = data.frame (time = seq(now, now + 10, by =1),  B  = 1:11)
>> ```
>>
>> (this is a simplification of for example:
>> https://github.com/wadpac/GGIR/blob/master/tests/testthat/test_read.myacc.csv.R 
>>
>> )
>>
>> Does this mean I am discouraged from putting a vector with POSIXct 
>> values
>> in a data.frame?
>> If yes, what would be the recommended work around?
>>
>> I have been trying to find documentation or online discussions about 
>> this
>> warning but no luck so far. I see R NEWS
>> <https://cran.r-project.org/doc/manuals/r-release/NEWS.html> mentions
>> updates to POSIXct related objects several times in the past year but 
>> those
>> seem to be different issues.
>>
>> Best,
>>
>> Vincent
>>
>>     [[alternative HTML version deleted]]
>>
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