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inheritable-accessors's Introduction

InheritableAccessors Build Status

Easily and consistently inherit attributes and configurations. This is particularly designed to work well with Rspec, which creates new inherited classes during each context.

Usage

Inheritable accessors comes with 3 inheritable components that can be used: an iheritable hash, set, and option accessor.

InheritableHashAccessor

class Parent
  include InheritableAccessors::InheritableHashAccessor

  inheritable_hash_accessor :options

  options[:a] = 1
end

class Child < Parent
  options[:b] = 2
end

item = Child.new

# deleted items do not affect parent items
item.delete(:a)
item.options[:c] = 3

Parent.options.to_hash
#=> {a: 1})
Child.options.to_hash
#=> {a: 1, b: 1})
item.options.to_hash
#=> {b: 2, c: 3})

InheritableOptionAccessor

class MyRequest
  include InheritableAccessors::InheritableHashAccessor
  include InheritableAccessors::InheritableOptionAccessor

  inheritable_hash_accessor   :request_opts
  inheritable_option_accessor :path, :action, :params, for: :request_opts

  # passing an argument to the accessor will "set" that value.
  action "GET"

  action # => "GET"

  # passing a block will use the value of the block, but *only* when it is
  # called.  Block values will be memoized after the first run.
  path { secret_path }

  protected

  def secret_path
    "/secret_path"
  end

end


request = MyRequest.new
request.path # => "/secret_path"
request.path "/other_path"
request.path # => "/other_path"

Installation

Add this line to your application's Gemfile:

gem 'inheritable_accessors'

And then execute:

$ bundle

Or install it yourself as:

$ gem install inheritable_accessors

Usage

see specs.

Contributing

  1. Fork it ( https://github.com/blakechambers/inheritable-accessors/fork )
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create a new Pull Request

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