Easily define object dependencies and inject them
Add this line to your application's Gemfile:
gem "fried-dependency"And then execute:
$ bundle
Or install it yourself as:
$ gem install fried-dependency
Define object dependencies:
class A
end
class B
end
class D
end
class C
include Fried::Dependency::Schema
dependency :a, A
dependency :b, B
def call
puts a.inspect
puts b.inspect
end
end
c = C.new
c.call # Prints <A...> and <B...>
c = C.new(a: D.new)
c.call # Prints <D...> and <B...>You can also specify default values:
class A
end
class B
attr_accessor :num
def initialize(num)
self.num = num
end
end
class C
include Fried::Dependency::Schema
dependency :a, A, -> { 123 }
# It optionally accepts `type` or `type` and `obj`.
# - `type` is the class of the dependency (B in this case)
# - `obj` is the instance being initialized (C.new in this case)
dependency :b, B, ->(type, obj) { type.new(obj.a) }
def call
puts b.num.to_s
end
end
c = C.new
c.call # Prints 123After 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.
Bug reports and pull requests are welcome on GitHub at https://github.com/Fire-Dragon-DoL/fried-dependency.