ruby - 如果模式验证未通过，如何防止干式验证执行规则？

Question

class PostSchema < Dry::Validation::Contract
  params do
    required(:title).value(:string, size: 20)
    required(:content).value(:string, size: 50)
  end 
  
  rule do 
     # prevent this rule from executing if schema validation did not pass
  end
end

我目前的解决方法是使用 result.schema_result.success?。即使这样也行得通，但我在 https://github.com/dry-rb/dry-validation/blob/master/lib/dry/validation/result.rb#L41 查看了源代码.它是一个私有(private) API。有人对此有任何想法吗？

Answer 1

没有指定任何键的规则将始终被执行。这是设计使然。如果您希望它不被执行，只需提供它所依赖的键，即:

rule(:title, :content) do
  # won't be executed unless both title and content passed
  # the schema checks
end