dry-error.rb

require 'dry-types'
require 'dry-validation'

module Types
  include Dry::Types.module
end

ctx = Dry::Validation.Schema do
  required(:some_int).filled(Types::Strict::Int)
  required(:some_bool).filled(Types::Strict::Bool)
end

val = Dry::Validation.Schema do
  required(:context).schema(ctx)
end

puts val.({}).errors
# => {:context=>["is missing"]}
puts val.({}).messages
# => /Users/bugagazavr/.rbenv/versions/2.3.4/lib/ruby/gems/2.3.0/gems/dry-validation-0.10.7/lib/dry/validation/message_set.rb:113:in `[]': no implicit conversion of Symbol into Integer (TypeError)
#        from /Users/bugagazavr/.rbenv/versions/2.3.4/lib/ruby/gems/2.3.0/gems/dry-validation-0.10.7/lib/dry/validation/message_set.rb:113:in `block in initialize_placeholders!'
#        from /Users/bugagazavr/.rbenv/versions/2.3.4/lib/ruby/gems/2.3.0/gems/dry-validation-0.10.7/lib/dry/validation/message_set.rb:106:in `each'
#        from /Users/bugagazavr/.rbenv/versions/2.3.4/lib/ruby/gems/2.3.0/gems/dry-validation-0.10.7/lib/dry/validation/message_set.rb:106:in `reduce'
#        from /Users/bugagazavr/.rbenv/versions/2.3.4/lib/ruby/gems/2.3.0/gems/dry-validation-0.10.7/lib/dry/validation/message_set.rb:106:in `initialize_placeholders!'
#        from /Users/bugagazavr/.rbenv/versions/2.3.4/lib/ruby/gems/2.3.0/gems/dry-validation-0.10.7/lib/dry/validation/message_set.rb:27:in `initialize'
#        from /Users/bugagazavr/.rbenv/versions/2.3.4/lib/ruby/gems/2.3.0/gems/dry-validation-0.10.7/lib/dry/validation/message_set.rb:16:in `new'
#        from /Users/bugagazavr/.rbenv/versions/2.3.4/lib/ruby/gems/2.3.0/gems/dry-validation-0.10.7/lib/dry/validation/message_set.rb:16:in `[]'
#        from /Users/bugagazavr/.rbenv/versions/2.3.4/lib/ruby/gems/2.3.0/gems/dry-validation-0.10.7/lib/dry/validation/message_compiler.rb:36:in `call'
#        from /Users/bugagazavr/.rbenv/versions/2.3.4/lib/ruby/gems/2.3.0/gems/dry-validation-0.10.7/lib/dry/validation/result.rb:53:in `message_set'
#        from /Users/bugagazavr/.rbenv/versions/2.3.4/lib/ruby/gems/2.3.0/gems/dry-validation-0.10.7/lib/dry/validation/result.rb:41:in `messages'
#        from 1.rb:18:in `<main>'