Dry-system: example app

wuarmin · April 26, 2021, 6:32pm

Hey,
I started creating an example app try_hanami_api_and_dry_system to get started with dry-system. I believe that it is, especially for dry-system-newbies, helpful to have a reference application. Maybe this app would help somebody in the future

But before that, I want to clarify some questions and improve the example. Maybe someone could take a look at the app and give some feedback. That would be very helpful.

For the sake of simplicity I added some questions as code-comments, so it should be clear, what’s my issue and goal:

Best practice to register classes/modules instead of instances:

github.com

wuarmin/try_hanami_api_and_dry_system/blob/a65de225497e4a234be93d3ab7794e95ede9df9d/app/lib/controllers/show_user.rb#L10


require "models/user"


module Controllers
  class ShowUser
    include Hanami::Action


    def call(params)
      self.format = :json


      # Question: What is the dry-system-way to inject the Models::User Class i.e. as App["user_repo"]? 
      # Should it be registered manually? The auto_register feature registers instances. 


      user = Models::User.with_pk!(params.get(:id))
      status 200, user&.to_json
    end
  end
end

How to auto/lazy-require files

github.com

wuarmin/try_hanami_api_and_dry_system/blob/a65de225497e4a234be93d3ab7794e95ede9df9d/spec/controllers/env_spec.rb#L1


require "controllers/env" # Question: How I could achive auto-requiring of "controllers/env"?


describe Controllers::Env do
  it "is successful" do
    response = subject.call({})


    expect(response[0]).to be(200)
    expect(response[1]["Content-Type"]).to eq("application/json; charset=utf-8")
    expect(response[2][0]).to eq("{\"env\":\"test\"}")
  end
end

Furthermore:
While creating I was not sure, how to auto-require Gemfile deps. So I created the bootable :dependencies component (system/boot/dependencies.rb). What do you think about it?

I would appreciate your feedback.

Best regards

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Dry-system: example app

Best practice to register classes/modules instead of instances:

How to auto/lazy-require files

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