Using dry-validation to check class attribute and / or external actor (API)

[nicolas-besnard]

I'd like to use dry-validation to ensure a particular class attributes is greater than an other.

For exemple:

Dry::Validation.Schema do
  required(:contribution).filled?
  required(:payment_amount).filled(:int?)

  rule(payment_amount_is_greater_than_contribution_amount: [:contribution, :payment_amount]) do |contribution, payment_amount|
    payment_amount.gt?(value(:contribution).amount)
  end
end

But I got the error ArgumentError: +amount+ is not a valid predicate name

My second use case will be an external API call as a validator:

Dry::Validation.Schema do
  required(:user).filled?

  rule(user_has_remote_account: [:user]) do |user|
    value(:user).remote_account?
  end
end

I think I can use a custom predicate for that, but I'm not sure it's the right way to do it.

Any chance someone can help me ? :)

[solnic]

rule uses internal DSL so you can't access normal values there. You can use validate instead:

  validate(user_has_remote_account: [:user]) do |user|
    user.remote_account?
  end

[nicolas-besnard]

Thanks for your quick answer ! Unfortunately, this method is not documented on your website :(

[solnic]

I'd appreciate if you could report an issue about missing docs under dry-rb/dry-rb.org project Thanks, Piotr

…

On 26 Jan 2017, 2:22 PM +0100, Nicolas Besnard ***@***.***>, wrote: Closed #309 (#309). — You are receiving this because you commented. Reply to this email directly, view it on GitHub (#309 (comment)), or mute the thread (https://github.com/notifications/unsubscribe-auth/AAAEKrf2E0uzJZD6iJG5ZRuXLLcT2ykzks5rWJ39gaJpZM4Luha_).