how to add errors in nested objects

[MathieuDerelle]

lets use this example :

optional do
  array :tags, class: String
  hash :prefs do
    boolean :smoking
    boolean :view
  end
end

I'd like to use custom validation on :smoking
I'm doing this in the validate method
How to add an error on key ":prefs -> :smoking" ?
Is it possible with add_error ?

[eugeneius]

The method documentation for add_error includes this example usage:

mutations/lib/mutations/command.rb

Line 109 in 87d6ecb

# add_error("colors.foreground", :not_a_color) # => to create errors = {colors: {foreground: :not_a_color}}

Unfortunately, it doesn't work correctly: the last key isn't converted to a symbol, so the error is added as [:colors]["foreground"] instead of [:colors][:foreground].

Both #121 and #132 would make it work as expected, but I'm not happy merging either of them because they would break backwards compatibility. I think the right way to fix this problem is with a deprecation cycle.

[MathieuDerelle]

thanks

could it be possible to have a similar way of doing it for arrays ?
like add_error("colors[3].foreground", :not_a_color) for adding error to the forth hash inside array colors

(it does not seem to be handled)

[eugeneius]

That does seem like a natural extension to the current API 👍 are you interested in implementing it?