Can't set rule for array of hashes

[spazer5]

class PropsContract < Dry::Validation::Contract
  json do
    required(:contacts).value(:array, min_size?: 1).each do
      hash do
        required(:name).filled(:string)
        required(:email).filled(:string)
        required(:phone).filled(:string)
      end
    end
  end

  rule("contacts.email").validate(:email_format)
end

This errors out: Dry::Validation::InvalidKeysError: PropsContract.rule specifies keys that are not defined by the schema: ["contacts.email"]

[solnic]

This is expected behavior. Rule path syntax doesn't support array items yet. In the future it'll be possible to do rule("contacts[].email") but for now, you gotta do this:

require 'dry-validation'

class PropsContract < Dry::Validation::Contract
  json do
    required(:contacts).value(:array, min_size?: 1).each do
      hash do
        required(:name).filled(:string)
        required(:email).filled(:string)
        required(:phone).filled(:string)
      end
    end
  end

  rule(:contacts).each do
    unless value[:email].include?('@')
      key([:email, values[:contacts].index(value)]).failure("email not valid")
    end
  end
end

c = PropsContract.new

c.(
  contacts: [
    { name: 'Jane', email: 'jane@doe.org', phone: '123' },
    { name: 'John', email: 'oops', phone: '123' }
  ]).errors.to_h.inspect
# {:email=>{1=>["email not valid"]}}

This will be slightly simplified once #606 is done, so stay tuned. I also reported #607 about the array item path syntax.