dry-rb/chat

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John Backus

@backus

I think I found my first dry-v bug of the new release

gem 'dry-validation', '~> 0.10'

require 'dry/validation'

schema =
  Dry::Validation.Schema do
    required(:foo) { str? }
    required(:bar) { str? | int? }
  end

schema.call(foo: 1, bar: 'blah').message_set.first.text # => "must be a string"

begin
  schema.call(foo: 'hi', bar: 1.0).message_set.first.text
rescue => err
  p err
end

# >> #<NoMethodError: undefined method `text' for #<Dry::Validation::Message::Or:0x007fbcb32514b8>>

@solnic or @flash-gordon ^

Is it a bug or were we using private API?

John Backus

@backus

works with #to_s

gem 'dry-validation', '~> 0.10'

require 'dry/validation'

SCHEMA =
  Dry::Validation.Schema do
    required(:foo) { str? }
    required(:bar, %i[string int]) { str? | int? }
  end

SCHEMA.call(foo: 1, bar: 'blah').message_set.first.to_s # => "must be a string"

begin
  SCHEMA.call(foo: 'hi', bar: 1.0).message_set.first.to_s # => "must be a string or must be an integer"
rescue => err
  p err
end

Piotr Solnica

@solnic

@backus #to_s should be used, not text

there’s also Result#errors and Result#hints

John Backus

@backus

cool

thanks

Joe Van Dyk

@joevandyk

I have a form schema called X. How can I validate that an array is filled with X?

http://dry-rb.org/gems/dry-validation/reusing-schemas/ deals with a hash with a key that has a schema of X

Joe Van Dyk

@joevandyk

I tired each { schema X } but got an error

oh hm.. that works with plain schemas, not form schemas

on dry-v master

if I use a form schema, I get:

/home/monkey/.gem/ruby/2.2.5/gems/dry-types-0.9.0/lib/dry/types/compiler.rb:80:in `merge': no implicit conversion of Dry::Types::Safe into Hash (TypeError)
    from /home/monkey/.gem/ruby/2.2.5/gems/dry-types-0.9.0/lib/dry/types/compiler.rb:80:in `each'

that a bug?

Kiril Dokh

@dsounded

@flash-gordon I just though it cause Scala has getOrElse for Try as well, sure, in general you should work around exceptions somehow, but in some cases it could be helpful

Kiril Dokh

@dsounded

@solnic, Am I able to pass a variable to validate error message somehos ?

Kiril Dokh

@dsounded

@flash-gordon WDYT if it would be possible to perform pattern-mathing gem on top of dry-monads and dry-equalizer ?

Kiril Dokh

@dsounded

Oh, I see this
https://github.com/dry-rb/dry-matcher

will check this out

Nikita Shilnikov

@flash-gordon

@dsounded re getOrElse, well, we can add it, though I'd add a disclaimer about its usage in Try and Either :)

re pattern matching, you can use case for simple ugh ... cases

Kiril Dokh

@dsounded

Sure, but currently that gem oriented only for Either like behavior

Nikita Shilnikov

@flash-gordon

in dry-matcher you can write a matcher for an arbitrary type http://dry-rb.org/gems/dry-matcher/

Christopher Dennl-Ortega Arrieta

@cdennl

what exactly is the difference now between hints and errors?

Piotr Solnica

@solnic

@cdennl hints are not errors, they are messages generated from your rule definitions, you can treat them separately to show useful feedback in UI so that the user will know about requirements for a given field

until 0.10 we only have messages that merge both errors and hints, this turned out to be problematic in some cases so it was separated in 0.10.0

Joe Van Dyk

@joevandyk

@solnic should i submit a bug about not being able to reuse form schemas?

each { schema SomeFormSchema } doesnt seem to work. Using a non form schema does.

Christopher Dennl-Ortega Arrieta

@cdennl

@solnic so errors are messages which happened during validations and hints are the stuff which might happen

Joshua Wilcox

@joshuaswilcox

is is possible to have conditional required params in dry-validation? i.e. one of either user_id or username is required?

Christopher Dennl-Ortega Arrieta

@cdennl

@joshuaswilcox yes with high level rules

Joshua Wilcox

@joshuaswilcox

Ah yes I see that now, sorry guess I missed that page all together

Christopher Dennl-Ortega Arrieta

@cdennl

@joshuaswilcox You're welcome

Christopher Dennl-Ortega Arrieta

@cdennl

@solnic Are the messages for high-level rules now ONLY generated from the high-level rules' name and no predicate messages anymore?

when they are inside a highlevel rule

I didn't get it completely from the changelog

Piotr Solnica

@solnic

@cdennl rule name overrides predicate name

Christopher Dennl-Ortega Arrieta

@cdennl

@cd

Piotr Solnica

@solnic

so foo: %i[one two] will use foo message if it’s present

Christopher Dennl-Ortega Arrieta

@cdennl

@solnic ok so in my errors.yml I only have to specify a string for the rule name then

Joshua Wilcox

@joshuaswilcox

So I tried

        required(:user_id).maybe(:int?)
        required(:global_auth_id).maybe(:str?)

        rule(valid_user: [:user_id, :global_auth_id]) do |user_id, global_auth_id|
          user_id.false?.then(global_auth_id.filled?)
        end

        rule(valid_auth_id: [:user_id, :global_auth_id]) do |user_id, global_auth_id|
          global_auth_id.false?.then(user_id.filled?)
        end

but i get

>> @schema.call(global_auth_id: '2')
=> #<Dry::Validation::Result output={:global_auth_id=>"2"} messages={:user_id=>["is missing"]}>

Christopher Dennl-Ortega Arrieta

@cdennl

@solnic ah it is optional? if it is not present it will use predicate?

Piotr Solnica

@solnic

when it’s missing we won’t apply any other rule

you marked it as required

Joshua Wilcox

@joshuaswilcox

so optional then?

with that I get

>> @schema.call(user_id: nil)
=> #<Dry::Validation::Result output={:user_id=>nil} messages={}>

basically I am trying to use two different params to do the same thing, so either is ok, but at least one and not both, ha

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