Error "r_vector" when defining col_types with readr::cols()

[jtrecenti]

Hi! Thanks for this awesome package.

After upgrading to R 4.0 and reinstalling packages, this error started to appear.

Using CRAN and github versions.

ctypes <- readr::cols(.default = readr::col_character())
ex <- vroom::vroom_example("mtcars-4.csv")

# does not work with vroom
vroom::vroom(ex, col_types = ctypes)
#> Error in vroom_(file, delim = delim %||% col_types$delim, col_names = col_names, : r_vector

# works with readr
readr::read_csv(ex, col_types = ctypes)
#> # A tibble: 11 x 12
#>    model       mpg   cyl   disp  hp    drat  wt    qsec  vs    am    gear  carb 
#>    <chr>       <chr> <chr> <chr> <chr> <chr> <chr> <chr> <chr> <chr> <chr> <chr>
#>  1 Datsun 710  22.8  4     108   93    3.85  2.32  18.61 1     1     4     1    
#>  2 Merc 240D   24.4  4     146.7 62    3.69  3.19  20    1     0     4     2    
#>  3 Merc 230    22.8  4     140.8 95    3.92  3.15  22.9  1     0     4     2    
#>  4 Fiat 128    32.4  4     78.7  66    4.08  2.2   19.47 1     1     4     1    
#>  5 Honda Civic 30.4  4     75.7  52    4.93  1.615 18.52 1     1     4     2    
#>  6 Toyota Cor… 33.9  4     71.1  65    4.22  1.835 19.9  1     1     4     1    
#>  7 Toyota Cor… 21.5  4     120.1 97    3.7   2.465 20.01 1     0     3     1    
#>  8 Fiat X1-9   27.3  4     79    66    4.08  1.935 18.9  1     1     4     1    
#>  9 Porsche 91… 26    4     120.3 91    4.43  2.14  16.7  0     1     5     2    
#> 10 Lotus Euro… 30.4  4     95.1  113   3.77  1.513 16.9  1     1     5     2    
#> 11 Volvo 142E  21.4  4     121   109   4.11  2.78  18.6  1     1     4     2

^{Created on 2020-09-15 by the reprex package (v0.3.0)}

Session info

devtools::session_info()
#> ─ Session info ───────────────────────────────────────────────────────────────
#>  setting  value                       
#>  version  R version 4.0.2 (2020-06-22)
#>  os       Manjaro Linux               
#>  system   x86_64, linux-gnu           
#>  ui       X11                         
#>  language (EN)                        
#>  collate  en_US.UTF-8                 
#>  ctype    en_US.UTF-8                 
#>  tz       America/Sao_Paulo           
#>  date     2020-09-15                  
#> 
#> ─ Packages ───────────────────────────────────────────────────────────────────
#>  package     * version date       lib source                      
#>  assertthat    0.2.1   2019-03-21 [1] CRAN (R 4.0.2)              
#>  backports     1.1.9   2020-08-24 [1] CRAN (R 4.0.2)              
#>  bit           4.0.4   2020-08-04 [1] CRAN (R 4.0.2)              
#>  bit64         4.0.5   2020-08-30 [1] CRAN (R 4.0.2)              
#>  callr         3.4.4   2020-09-07 [1] CRAN (R 4.0.2)              
#>  cli           2.0.2   2020-02-28 [1] CRAN (R 4.0.2)              
#>  crayon        1.3.4   2017-09-16 [1] CRAN (R 4.0.2)              
#>  desc          1.2.0   2018-05-01 [1] CRAN (R 4.0.2)              
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#>  pillar        1.4.6   2020-07-10 [1] CRAN (R 4.0.2)              
#>  pkgbuild      1.1.0   2020-07-13 [1] CRAN (R 4.0.2)              
#>  pkgconfig     2.0.3   2019-09-22 [1] CRAN (R 4.0.2)              
#>  pkgload       1.1.0   2020-05-29 [1] CRAN (R 4.0.2)              
#>  prettyunits   1.1.1   2020-01-24 [1] CRAN (R 4.0.2)              
#>  processx      3.4.4   2020-09-03 [1] CRAN (R 4.0.2)              
#>  ps            1.3.4   2020-08-11 [1] CRAN (R 4.0.2)              
#>  purrr         0.3.4   2020-04-17 [1] CRAN (R 4.0.2)              
#>  R6            2.4.1   2019-11-12 [1] CRAN (R 4.0.2)              
#>  Rcpp          1.0.5   2020-07-06 [1] CRAN (R 4.0.2)              
#>  readr         1.3.1   2018-12-21 [1] CRAN (R 4.0.2)              
#>  remotes       2.2.0   2020-07-21 [1] CRAN (R 4.0.2)              
#>  rlang         0.4.7   2020-07-09 [1] CRAN (R 4.0.2)              
#>  rmarkdown     2.3     2020-06-18 [1] CRAN (R 4.0.2)              
#>  rprojroot     1.3-2   2018-01-03 [1] CRAN (R 4.0.2)              
#>  sessioninfo   1.1.1   2018-11-05 [1] CRAN (R 4.0.2)              
#>  stringi       1.5.3   2020-09-09 [1] CRAN (R 4.0.2)              
#>  stringr       1.4.0   2019-02-10 [1] CRAN (R 4.0.2)              
#>  testthat      2.3.2   2020-03-02 [1] CRAN (R 4.0.2)              
#>  tibble        3.0.3   2020-07-10 [1] CRAN (R 4.0.2)              
#>  tidyselect    1.1.0   2020-05-11 [1] CRAN (R 4.0.2)              
#>  usethis       1.6.1   2020-04-29 [1] CRAN (R 4.0.2)              
#>  utf8          1.1.4   2018-05-24 [1] CRAN (R 4.0.2)              
#>  vctrs         0.3.4   2020-08-29 [1] CRAN (R 4.0.2)              
#>  vroom         1.3.1   2020-09-15 [1] Github (r-lib/vroom@00061a5)
#>  withr         2.2.0   2020-04-20 [1] CRAN (R 4.0.2)              
#>  xfun          0.16    2020-07-24 [1] CRAN (R 4.0.2)              
#>  yaml          2.2.1   2020-02-01 [1] CRAN (R 4.0.2)              
#> 
#> [1] /home/jt/R/x86_64-pc-linux-gnu-library/4.0
#> [2] /usr/lib/R/library

[jimhester]

The problem is loading readr before vroom, this also came up in #256, you need to use vroom::cols() and vroom::col_character(), or just list(.default = "c") for simplicity.

e.g.

ctypes <- list(.default = "c")
ex <- vroom::vroom_example("mtcars-4.csv")

vroom::vroom(ex, col_types = ctypes)
#> # A tibble: 11 x 12
#>    model       mpg   cyl   disp  hp    drat  wt    qsec  vs    am    gear  carb 
#>    <chr>       <chr> <chr> <chr> <chr> <chr> <chr> <chr> <chr> <chr> <chr> <chr>
#>  1 Datsun 710  22.8  4     108   93    3.85  2.32  18.61 1     1     4     1    
#>  2 Merc 240D   24.4  4     146.7 62    3.69  3.19  20    1     0     4     2    
#>  3 Merc 230    22.8  4     140.8 95    3.92  3.15  22.9  1     0     4     2    
#>  4 Fiat 128    32.4  4     78.7  66    4.08  2.2   19.47 1     1     4     1    
#>  5 Honda Civic 30.4  4     75.7  52    4.93  1.615 18.52 1     1     4     2    
#>  6 Toyota Cor… 33.9  4     71.1  65    4.22  1.835 19.9  1     1     4     1    
#>  7 Toyota Cor… 21.5  4     120.1 97    3.7   2.465 20.01 1     0     3     1    
#>  8 Fiat X1-9   27.3  4     79    66    4.08  1.935 18.9  1     1     4     1    
#>  9 Porsche 91… 26    4     120.3 91    4.43  2.14  16.7  0     1     5     2    
#> 10 Lotus Euro… 30.4  4     95.1  113   3.77  1.513 16.9  1     1     5     2    
#> 11 Volvo 142E  21.4  4     121   109   4.11  2.78  18.6  1     1     4     2

^{Created on 2020-09-15 by the reprex package (v0.3.0)}

[jtrecenti]

Perfect, thanks! I was not aware of the vroom::cols().

Do you think it would be useful to add a comment about that here?

https://github.com/r-lib/vroom/blob/00061a52f2c4dabb832a528a3a84ba46d3d2f453/vignettes/vroom.Rmd#L197

I can make a PR if needed

[jimhester]

Sure, that sounds like a great idea to me.