Dry::AutoInject
A simple extensions which allows you to automatically inject dependencies to your object constructors from a configured container.
It does 3 things:
- Defines a constructor which accepts dependencies
- Defines attribute readers for dependencies
- Injects dependencies automatically to the constructor with overridden
.new
Installation
Add this line to your application's Gemfile:
gem 'dry-auto_inject'
And then execute:
$ bundle
Or install it yourself as:
$ gem install dry-auto_inject
Usage
You can use AutoInject
with any container that responds to []
. In this example
we're going to use dry-container
:
# set up your container
my_container = Dry::Container.new
my_container.register(:data_store, -> { DataStore.new })
my_container.register(:user_repository, -> { container[:data_store][:users] })
my_container.register(:persist_user, -> { PersistUser.new })
# set up your auto-injection module
AutoInject = Dry::AutoInject.new { container(my_container) }
# then simply include it in your class providing which dependencies should be
# injected automatically from the configure container
class PersistUser
include AutoInject[:user_repository]
def call(user)
user_repository << user
end
end
persist_user = my_container[:persist_user]
persist_user.call(name: 'Jane')
Development
After checking out the repo, run bin/setup
to install dependencies. Then, run rake spec
to run the tests. You can also run bin/console
for an interactive prompt that will allow you to experiment.
To install this gem onto your local machine, run bundle exec rake install
. To release a new version, update the version number in version.rb
, and then run bundle exec rake release
, which will create a git tag for the version, push git commits and tags, and push the .gem
file to rubygems.org.
Contributing
Bug reports and pull requests are welcome on GitHub at https://github.com/dryrb/dry-auto_inject.