MetaMagic

Some useful methods for object-agnostic views, controllers, and models.

Add this line to your application's Gemfile:

gem 'meta_magic'

And then execute:

$ bundle

Or install it yourself as:

$ gem install meta_magic

Sometimes it can be a pain when you need to link to certain actions when you don't necessarily know what type of object you have in a Rails view. The object_path and objects_path methods make this easy.

First, include helper in your helpers/application_helper.rb to gain access to the methods in your view:

module ApplicationHelper
  include MetaMagic::Helper
end

Then, link away:

<%= link_to object.display_name, object_path(@user_object) %>
<!-- <a href="/users/:id">John Doe</a> -->

<%= link_to 'See Activity', object_path(product_object, action: :activities) %>
<!-- <a href="/products/:id/activities">See Activity</a> -->

<%= link_to 'See All', objects_path(@book) %>
<!-- <a href="/books">See All</a> -->

The controller methods are quite handy for controller concerns, especially when the concerns are shared across multiple controllers.

class UsersController < ApplicationController
  include MetaMagic::Controller
end

Including Meta Magic will expose a few handy methods that can be used dynamically amongst controllers:

def get_model_instance_variable
  instance_variable_get(:"@#{ controller_name.classify.underscore.downcase }")
end

def set_model_instance_variable
  send(:"set_#{ controller_name.classify.underscore.downcase }")
end

def assign_models_instance_variable_array
  instance_variable_set(:"@#{ controller_name }", get_model_class.all)
end

def get_model_class
  controller_name.classify.constantize
end

1. Fork it ( http://github.com/johnotander/meta_magic/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 new Pull Request