dry-rb/chat

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Piotr Solnica

@solnic

gimme a sec

require 'dry-validation'

base = Dry::Validation.Schema do
  key(:name).required
  key(:email).required
end

json = Dry::Validation.Schema(base) do
  configure { config.input_processor = :json }
end

form = Dry::Validation.Schema(base) do
  configure { config.input_processor = :form }
end

Piotr Solnica

@solnic

@sled ^^ this will work

but I gotta say just using Dry::Validation.Form|JSON should work too, something to improve…

Simon Schmid

@sled

@solnic, yes I'm building a service object, and this can be fed from either form input or an API call (JSON)

so I'm basically injecting the input processor from the outside :)

stigchristian

@stigchristian

thanks @iBublik

Simon Schmid

@sled

I'm using dry-types + dry-validation as replacement for virtus to model JSON documents, is it overkill to both use dry-type and dry-validation?

I'm feeling like I'm writting a lot of things twice

e.g an Address type + a Schema for the address

Andy Holland

@AMHOL

@sled personally I think there's value in keeping coercion/type-safety logic separate from validation logic, having said that, Dry::Validation::Schema::JSON landed in dry-validation master branch recently, which uses a json input processor to infer coercions in the same way Dry::Validation::Schema::Form works

Piotr Solnica

@solnic

@sled how exactly do you use dry-types?

Simon Schmid

@sled

mh basically what our app does is porting paper forms to "digital" forms

so I want to use dry-types to describe the structure of these forms/documents

I just got confused whether I should use Types::Form::Int, Types::Coercible::Int in my document type definition

because the validation also does some coercion right?

Piotr Solnica

@solnic

no, you should not. your ‘models’ should not do any coercions

Simon Schmid

@sled

okay so I keep the models "pure and strict" types

Piotr Solnica

@solnic

yes, that’s the intention of structs in dry-types

should be as simple as possible

Simon Schmid

@sled

got it, thanks a lot! :)

Piotr Solnica

@solnic

JSON schemas are available in latest release btw

Simon Schmid

@sled

another dumb question why isn't there a Types::Maybe::Int ?

I see Types::Maybe::Strict::Int and Types::Maybe::Coercible::Int in the docs

Piotr Solnica

@solnic

because reasons :laughing:

I honestly don’t know, I probably didn’t have a use case for them yet so I didn’t add them

Simon Schmid

@sled

ah so Types::Int.optional would be equivalent to Types::Maybe::Int ?

Piotr Solnica

@solnic

btw Types::Int.optional would do it

yes

Simon Schmid

@sled

cool! :)

Piotr Solnica

@solnic

it’s basically Types::Strict::Nil | Types::Int

Simon Schmid

@sled

I'm really enjoying the dry-rb repository :)

Piotr Solnica

@solnic

awesome :)

Simon Schmid

@sled

have you ever tried to mixin schemas? :)

Like class House < Dry::Types::Struct; include Addressable; .... end

Piotr Solnica

@solnic

nope, I don’t use mixins in structs at all

Simon Schmid

@sled

how do you handle commonly repeating subsets of fields then? :)

Piotr Solnica

@solnic

class inheritance

Simon Schmid

@sled

are incomplete types possible e.g if I set some attributes as optional with a default, do I have to pass the key in the initializer e.g ModelType.new({optional_field: nil}) vs ModelType.new

Piotr Solnica

@solnic

@sled it’s being discussed how structs should work wrt optional attrs dry-rb/dry-types#72

currently you need constructor_type(:schema) to be set for optional types with default values to be set when sth is missing

Simon Schmid

@sled

thx! now I just have to bend rails to re-load my types correctly :D

Piotr Solnica

@solnic

@sled see dry-types-rails

Simon Schmid

@sled

yes but this seems broken

just read the conversation here in gitter

Piotr Solnica

@solnic

ah damn

Simon Schmid

@sled

yep, not the first time rails breaks my balls ;)

I think the issue is the "registry" of the container is not re-loaded properly

Piotr Solnica

@solnic

could be it

I don’t use rails at the moment so I’m not looking into it

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