custom-unique-pred-dry-v.rb

require 'dry-validation'

SCHEMA = Dry::Validation.Schema do
  configure do
    config.input_processor = :sanitizer

    def self.messages
      Dry::Validation::Messages.default.merge(en: { errors: { unique?: "oops not unique" }})
    end

    def unique?(value)
      value.flat_map { |kp| kp[:key_phrase]  }.uniq.size == value.size
    end
  end

  required(:key_phrases).each do
    schema do
      required(:weight).filled(gteq?: 0, lteq?: 4)
      required(:key_phrase).filled
    end
  end

  rule(unique_phrases: [:key_phrases]) do |key_phrases| 
    key_phrases.unique?
  end
end

module JsonPayload
  def self.example_repeated_keys
    {
      name: "name",
      user_id: "01dd7006-8b96-48e8-954e-5a9da4cd72e0",
      bap_control_id: "01dd7006-8b96-48e8-954e-5a9da4cd72e0",
      implementation: "imp lang",
      key_phrases: [
        {
          key_phrase: "ph1",
          weight: 5.3
        },
        {
          key_phrase: "ph1",
          weight: 6.2
        }
      ]
    }
  end

  def self.example_normal
    {
      name: "name",
      user_id: "01dd7006-8b96-48e8-954e-5a9da4cd72e0",
      bap_control_id: "01dd7006-8b96-48e8-954e-5a9da4cd72e0",
      implementation: "imp lang",
      key_phrases: [
        {
          key_phrase: "ph1",
          weight: 5.3
        },
        {
          key_phrase: "ph2",
          weight: 6.2
        }
      ]
    }
  end
end

puts SCHEMA.(JsonPayload.example_normal).messages.inspect
puts SCHEMA.(JsonPayload.example_repeated_keys).messages.inspect

hi @solnic, so this validation, don't works: required(:weight).filled(gteq?: 0, lteq?: 4). Only key_phrases rule works. I though to make this validations in steps, like: validates key_phrases rule and if true validates weight value between 0 and 4. For now, only key_phrases rule validation is ok.