Issue with check_required_aesthetics() - y not found

[LukasWallrich]

Thanks for this great package & please note that I have not encountered this issue in production but just when playing around - but I still wanted to report it just in case it matters.

In the code below, I get an error message claiming that the y-aesthetic is missing, while it is clearly provided and also picked up by other geoms.

library(ggridges)
library(ggplot2)
ggplot(mtcars, aes(x = mpg, y = cyl)) + geom_density_ridges()
#> Picking joint bandwidth of 2.48
#> Error in `check_required_aesthetics()`:
#> ! geom_density_ridges requires the following missing aesthetics: y

[clauswilke]

Not sure why the error message is what it is. The problem is that the y aesthetic needs to be discrete.

library(ggridges)
library(ggplot2)
ggplot(mtcars, aes(x = mpg, y = factor(cyl))) + 
  geom_density_ridges()
#> Picking joint bandwidth of 1.38

^{Created on 2022-02-09 by the reprex package (v2.0.0)}

[LukasWallrich]

So simple - but not something I would have figured out anytime soon from that error ...