TypeError: no implicit conversion of Symbol into Integer using nested hash and rule

[TimoMoss]

Hello,
I'm getting an error in the following combination

• gem 'dry-validation', '~> 1.4
• Affects my production application: YES.
• Ruby version: '2.5.7'
• OS: Mac OS

class ValidateParams < Dry::Validation::Contract
   schema do
     required(:data).hash do
       required(:relationships).hash do
           required(:object).hash do
             required(:data).hash do
                required(:id).filled(:string)
            end
          end
        end
      end
   end

  register_macro(:format) do |macro:|
     if value&.!~ macro.args.first
       message = 'nvalid format'
       key(keys.flatten).failure(message)
     end
  end

  rule(%i[data relationships object data id]).validate(format: /some reg exp/)
end

scenario:
I'm trying to check that the type of the nested hash is Hash,
for this purpose, in specs, I assign to it an Array, so I expect to get a message:
{data: {relationships: {object: {data: ['must be a hash']}}}}

RSpec.describe ValidateParams do
 let(:validation) { described_class.new }
 context 'invalid type of inested hash' do
    before do
      params[:data][:relationships][:object][:data] = []
    end

    it 'looks like failure' do
       message = {data: {relationships: {object: {data: ['must be a hash']}}}}
       expect(validation.call(params).errors.to_h).to eq(message)
    end
 end

instead of that, I get the following error:

  Failure/Error: if value&.!~ macro.args.first
     
     TypeError:
       no implicit conversion of Symbol into Integer

Please note that the error started to occur only after adding the rule which checks for the format of a key included in the nested hash.

if I change the checking type to sting or integer I get another error:

before do
  params[:data][:relationships][:object][:data] = 'some string'
end

Failure/Error: if value&.!~ macro.args.first
     
     TypeError:
       String does not have #dig method

Also, it might be important that the point where the error happens is the method 'value'

[solnic]

hey @TimoMoss thanks for reporting this. I didn't manage to fix it in 1.6.0 but we'll get to it eventually in 1.6.1 🙂