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as_datetime returns POSIXlt #713

adfi opened this issue Sep 5, 2018 · 2 comments · Fixed by #818


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@adfi adfi commented Sep 5, 2018

I ran into a problem when using as_datetime in combination with dplyr::mutate. The latter doesn't accept POSIXlt which was being returned by as_datetime. However looking into the documentation there is no mention of POSIXlt. The documentation states: "These are drop in replacements for as.Date() and as.POSIXct()".

So is the documentation incomplete or should the function be changed?

class(as_datetime("2018-09-05 09:41:31", format="%Y-%m-%d %H:%M:%S"))
[1] "POSIXlt" "POSIXt"


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@vspinu vspinu commented Sep 6, 2018

There might have been a reason for that. If not, the output type should be changed indeed. Will have a look.


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@hadley hadley commented Nov 19, 2019

Minimal reprex illustrating inconsistency:

library(lubridate, warn.conflicts = FALSE)
class(as_datetime("2018-09-05 09:41:31"))
#> [1] "POSIXct" "POSIXt"
class(as_datetime("2018-09-05 09:41:31", format="%Y-%m-%d %H:%M:%S"))
#> [1] "POSIXlt" "POSIXt"

Created on 2019-11-19 by the reprex package (v0.3.0)

hadley added a commit that referenced this issue Nov 19, 2019
Fixes #713
@hadley hadley added bug wip labels Nov 19, 2019
@vspinu vspinu closed this in #818 Nov 28, 2019
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