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group_by() fails on already grouped data frame when using .data pronoun #3533

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kevinykuo opened this issue Apr 24, 2018 · 2 comments
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@kevinykuo
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@kevinykuo kevinykuo commented Apr 24, 2018

E.g.

iris %>% 
  group_by(Species) %>%
  group_by(.data$Species)
# Error in mutate_impl(.data, dots) : 
#   Column `Species` can't be modified because it's a grouping variable
@romainfrancois romainfrancois self-assigned this Apr 24, 2018
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@romainfrancois romainfrancois commented Apr 24, 2018

Kind of related to #2752

We need some special handling of .data$ in group_by, and/or for mutate to understand that there is nothing to do:

> mutate( group_by(iris, Species), .data$Species )
 Error in mutate_impl(.data, dots) : 
  Column `Species` can't be modified because it's a grouping variable 

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This old issue has been automatically locked. If you believe you have found a related problem, please file a new issue (with reprex) and link to this issue. https://reprex.tidyverse.org/

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