Specify nesting columns by using character vector in tidyr::complete

Question

How can I define the columns I want to use for nesting in the tidyr::complete function?

one_of or as.name are not working.

library(dplyr, warn.conflicts = FALSE)
df <- tibble(
  group = c(1:2, 1),
  item_id = c(1:2, 2),
  item_name = c("a", "b", "b"),
  value1 = 1:3,
  value2 = 4:6
)
char_vec <- c("item_id", "item_name")
df %>% complete(group, nesting(char_vec))

Error: `by` can't contain join column `char_vec` which is missing from RHS
Run `rlang::last_error()` to see where the error occurred.

Answer 1

An up to date solution with dplyr version 1.06 is !!!syms() :

library(dplyr)
df %>%
    complete(group, nesting(!!!syms(char_vec)))

Answer 2

Ok, I figured it out.

library(dplyr, warn.conflicts = FALSE)
df <- tibble(
  group = c(1:2, 1),
  item_id = c(1:2, 2),
  item_name = c("a", "b", "b"),
  value1 = 1:3,
  value2 = 4:6
)
char_vec <- c("item_id", "item_name")
df %>% complete(group, nesting(!!as.symbol(char_vec)))