multi-predicates.rb

require 'bundler/inline'

gemfile(true) do
  source 'https://rubygems.org'

  gem 'dry-validation'
end

module MyPredicates1
  include Dry::Logic::Predicates

  predicate(:one?) do |value|
    value == 1
  end
end

module MyPredicates2
  include Dry::Logic::Predicates

  predicate(:two?) do |value|
    value == 2
  end
end


schema = Dry::Validation.Schema do
  configure do
    predicates(MyPredicates1)
    predicates(MyPredicates2)

    def self.messages
      super.merge(
        en: { errors: {
          one?: '%{value} not 1',
          two?: '%{value} not 2'
        } }
      )
    end
  end

  required(:x).filled(:int?, :one?)
  required(:x).filled(:int?, :two?)
end

p schema.({})
p schema.(x: 1)
p schema.(x: 2)
p schema.(x: 3)

~/.rbenv/versions/2.4.3/lib/ruby/gems/2.4.0/gems/dry-validation-0.11.1/lib/dry/validation/predicate_registry.rb:106:in `raise_unknown_predicate_error': +one?+ is not a valid predicate name (ArgumentError)
	from ~/.rbenv/versions/2.4.3/lib/ruby/gems/2.4.0/gems/dry-validation-0.11.1/lib/dry/validation/predicate_registry.rb:99:in `ensure_valid_predicate'
	from ~/.rbenv/versions/2.4.3/lib/ruby/gems/2.4.0/gems/dry-validation-0.11.1/lib/dry/validation/schema/value.rb:156:in `node'
	from ~/.rbenv/versions/2.4.3/lib/ruby/gems/2.4.0/gems/dry-validation-0.11.1/lib/dry/validation/schema/rule.rb:193:in `key'
	from ~/.rbenv/versions/2.4.3/lib/ruby/gems/2.4.0/gems/dry-validation-0.11.1/lib/dry/validation/schema/rule.rb:169:in `block in infer_predicates'
	from ~/.rbenv/versions/2.4.3/lib/ruby/gems/2.4.0/gems/dry-validation-0.11.1/lib/dry/validation/schema/rule.rb:163:in `map'
	from ~/.rbenv/versions/2.4.3/lib/ruby/gems/2.4.0/gems/dry-validation-0.11.1/lib/dry/validation/schema/rule.rb:163:in `infer_predicates'
	from ~/.rbenv/versions/2.4.3/lib/ruby/gems/2.4.0/gems/dry-validation-0.11.1/lib/dry/validation/schema/rule.rb:65:in `filled'
	from ./multi-predicates.rb:41:in `block in <main>'
	from ~/.rbenv/versions/2.4.3/lib/ruby/gems/2.4.0/gems/dry-validation-0.11.1/lib/dry/validation/schema/class_interface.rb:48:in `instance_exec'
	from ~/.rbenv/versions/2.4.3/lib/ruby/gems/2.4.0/gems/dry-validation-0.11.1/lib/dry/validation/schema/class_interface.rb:48:in `define'
	from ~/.rbenv/versions/2.4.3/lib/ruby/gems/2.4.0/gems/dry-validation-0.11.1/lib/dry/validation.rb:18:in `Schema'
  from ./multi-predicates.rb:26:in `<main>'