count not working

[ds-jim]

Count doesn't seem to work , I'm using R 4.0 and dtplyr 1.0.1.9000

Borrowed the repex that was shown to work from issue 97 #97

suppressPackageStartupMessages(library(dplyr))
library(dtplyr)

mtcars %>%  
  group_by(vs) %>% 
  count(am)
#> # A tibble: 4 x 3
#> # Groups:   vs [2]
#>      vs    am     n
#>   <dbl> <dbl> <int>
#> 1     0     0    12
#> 2     0     1     6
#> 3     1     0     7
#> 4     1     1     7

mtcars %>%  
  lazy_dt() %>% 
  group_by(vs) %>% 
  count(am)
#> Source: local data table [?? x 4]
#> Call:   copy(`_DT1`)[, `:=`(.add = TRUE), keyby = .(vs)][, .(n = .N), 
#>     keyby = .(am, .add, .drop)]
#> Error in eval(bysub, x, parent.frame()): object '.drop' not found

^{Created on 2020-06-05 by the reprex package (v0.3.0)}

[GitHunter0]

I'm having the same issue

[fmannhardt]

Same issue here.

[hadley]

I see a different problem:

library(dtplyr)
library(dplyr, warn.conflicts = FALSE)

dt <- lazy_dt(data.frame(x = c(1, 1, 2)))

dt %>% count(x)
#> Error in UseMethod("count"): no applicable method for 'count' applied to an object of class "c('dtplyr_step_first', 'dtplyr_step')"

^{Created on 2021-01-25 by the reprex package (v0.3.0.9001)}

[ds-jim]

I've updated to the latest development dtplyr and can confirm that I get the exact same error as your reprex now.