Injecting dependencies
Most views will need access to other parts of your application to prepare values for the view. Since views follow the "functional object" pattern (local state for config and collaborators only, with any variable data passed to #call), it’s easy to use dependency injection to make your application’s objects available to your views.
To set up the injection manually, accept arguments to #initialize and assign them to instance variables.
class MyView < Dry::View
attr_reader :user_repo
def initialize(user_repo:)
@user_repo = user_repo
super()
end
expose :users do
user_repo.listing
end
end
Or if your app uses dry-system or dry-auto_inject, this is even less work:
# Require the auto-injector module for your app's container
require "my_app/import"
class MyView < Dry::View
include MyApp::Import["user_repo"]
expose :users do
user_repo.listing
end
end