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Piotr Solnica
@solnic
@blelump re your question from earlier today, I used similar approach last year in a biggerish rails app, started with dry-container, then auto_inject was born from it, then I built rodakase, then dry-component was born from it, then we built a couple of dry-web (post-rodakase) apps with Tim at IceLab, they are a couple times bigger than Berg, all use multi-system setups. 95% of the features we have in dry-system/container/auto_inject are a result of discovering specific needs when working on these apps. Overall we’ve been super happy with how it works; however, we are hitting some challenges, ie in dev mode shotgun is too slow and makes clicking through the website too slow, we’ll be addressing this shortly (that’s related to code reloading, although I don’t know what strategy we will use eventually)
Daniel Vandersluis
@dvandersluis

I'm probably missing something obvious, but i'm getting behaviour that seems wrong to me. Consider the following

configure do
  def valid_email?(value)
    true
  end
end

required(:email).filled(:valid_email?)

When I pass in a blank string for email, I always get BOTH error messages (:email=>["must be filled", "Email is invalid"]). If blank I just want the "must be filled" error.

required(:email) { filled? & valid_email? } gives me the same
Also as you can see, the valid_email? predicate always returns true and yet still adds an error
Piotr Solnica
@solnic
@dvandersluis that’s a hint, not an error, we’re gonna make that configurable (opt-in/out) and you can override it’s message via en.errors.valid_email?.(hint|failure)
so ie you can put under hint sth like make sure it’s a valid email
and for failure “this does not look like a valid email”
Daniel Vandersluis
@dvandersluis
ah okay that makes sense
so as of 0.9.5 there's nothing I can configure right?
Piotr Solnica
@solnic
@dvandersluis you can do schema.(input).message_set.dump to skip hints
it’s gonna return a hash with failures exclusively
default behavior of #messages is to include them
btw more insights about hints/failures here dry-rb/dry-validation#225
Daniel Vandersluis
@dvandersluis
ok I'll check that out.
I'm using dry-v via reform so I'm not sure how I would go about calling the message set, but I'll see what I can figure out
Piotr Solnica
@solnic
@fran-worley ^^^ ??? (again :D)
Daniel Vandersluis
@dvandersluis
:)
Fran Worley
@fran-worley
@blelump good thanks. Just doing the docs for Formular which should help you and is pretty much the last thing before release!
@solnic I was just wondering how your going to merge them. Though the more I think about it the more it makes sense. Funny how long it takes to see something clearly!
Michał Pietrus
@blelump
@fran-worley :fireworks: :sparkles:
Piotr Solnica
@solnic
@fran-worley the class hierarchy is a bit borked, ie Predicate is not the most low-level primitive “rule” type, as it has an identifier, which is a very specific concept in dry-logic - a named rule, so ie Rule::Key is a named rule and…Predicate is a named rule too
so basically we can’t treat predicate objects as some low-level rules
furthermore, the issue with 2 types of return values is troublesome, this must behave in a consistent manner since a rule have a predicate, and that predicate can be another rule OR a predicate itself, this made things more complex than it should be
so essentially we need a single rule concept, with various specialisations, and predicates should be just…methods returning true/false (so ie anonymous blocks or methods from modules/classes/objects that we detach via Method objects)
this should simplify the whole thing, as we’re gonna deal with just one concept - rule
and I’d like to try to keep the idea of “an applied rule” where all args are filled, we’ll see how it goes
the requirement is that rule instantiation must not be too expensive
Piotr Solnica
@solnic
@flash-gordon I was typing a response to that new dry-types issue and SUDDENLY your reply appeared, I freaked out, I freaked out badly :laughing:
Nikita Shilnikov
@flash-gordon
@solnic ah, just the only question I know the answer to :laughing:
Fran Worley
@fran-worley
@solnic makes sense it always seemed kinda irritating that really simple rules with essentially just one predicate had to get wrapped in a rule object. Do you mind if I capture your thoughts above and add them as a comment on the dry-logic PR ?
Michał Pietrus
@blelump
@solnic , thanks for detailed explanation ! Re the container issue, it seems _container comes from dry::container, however when finalize! is performed, it also freezes the system::container itself. I am out of ideas for today , see you tomorrow :-)
Piotr Solnica
@solnic
@blelump oh we just would not finalize! in dev mode, that’s all
Michał Pietrus
@blelump

hi @solnic, I am definietly not a reload–constant guru, but here's what I've found.

Having container without finalization indeed helps and this seems to be the best fit for the dev mode unless you want to explicitly desire some dependency, which hasn't been registered. Only dependencies that are auto–injected are getting registered by default. So if I expect a constant that is on container load path, but didn't get registrered into container, I may call AppContainer.auto_registrar.finalize!. This performs auto registration of all components I've specified in config.auto_register. So far so good, I have everything. Now I change something and it enters:

ActionDispatch::Reloader.to_prepare do
  Object.__send__(:remove_const, :Import)
  AppContainer.instance_variable_set('@_container', ::Concurrent::Hash.new)
  Import = AppContainer.injector
  AppContainer.auto_registrar.finalize!
end

It's not good approach since there're still references to the "old" constants and app crashes after refreshing it.

Besides the above issue, auto_registrar internally calls require_component of the container. The interesting part is Kernel.require which returns false for any n–th load (n > 1) so block doesn't get executed and the container is actually empty, however I am not sure that's the appropriate usage (calling auto_registrar.finalize!).

Igor
@svilenkov
When using dry-initializer how can you add some code to the initialize() method without affecting gems behavior?
Piotr Solnica
@solnic
@blelump I think you should talk to @timriley as I’m almost sure he’d be interested in seeing how hot-reloading of a container could be implemented properly. I won’t have time for this during this week. Way too much mojowork + dry-logic/validation. Sorry ¯_(⊙ʖ⊙)
for rails we probably need to integrate with their AS::Dependencies so it knows about constants loaded by the system
Andrew Kozin
@nepalez
@keeperhood you can just reload the initializer
class MyClass
  extend Dry::Initializer::Mixin

  param :foo

  private

  def initialize(foo, bar)
    @bar = bar
    super(foo)
  end
end
Definitely you have to know a signature of the method to call super properly if you're going to change the signature
Michał Pietrus
@blelump
@solnic , sure! Re AS::Dependencies, my thoughts was similar, however I'm already late due to various issues with hot reloading so I'm going to postpone this task for a while.
Igor
@svilenkov
@nepalez I was thinking the same but what is the signature, it's defined by param values ?
Not sure if super without () would forward arguments if defined as *args
Igor
@svilenkov
I think that will work actually
Just tried in irb
class MyClass
  extend Dry::Initializer::Mixin

  param :foo
  param :bar

  def initialize(*args)
    # do some custom initialization stuff here
    super # calling super without () will forward all arguments
  end
end
Andy Holland
@AMHOL
@solnic is there anything in dry-v to pass through attributes that aren't defined in the validator and just apply validations for the ones that are, use-case being separation of schema/domain validation
Piotr Solnica
@solnic
@AMHOL nope, it rejects unspeced keys
Andy Holland
@AMHOL
Ahh OK, think supporting something like that could be beneficial?
I don't want to duplicate schema validations in domain validators
Andrew Kozin
@nepalez

@keeperhood yes it would. My example displays that you principally can add new arguments of the initializer that does not defined by dry-initializer. But this time you should know what arguments to send to super explicitly.

What Dry::Initializer::Mixin does is provides a module with #initialize method defined, and then includes the module to the class. If you wish not to pollute your class scope with helpers (like param and option), you can make this inclusion explicitly:

class MyClass
  include Dry::Initializer.define -> do
    param :foo
    param :bar
  end
end

In any case what you get is the module with initialize method in a sequence of class ancestors. Then you can work with it via super in a common ruby way.

Piotr Solnica
@solnic
@AMHOL not sure why would that be needed?