Rails Integration

The easiest way to integrate Matestack is by creating custom components and using our provided matestack_component(component, options = {}, &block) helper. Imagine a scenario where we have a product teaser partial in app/views/products/_teaser.html.erb containing following content:

<%= link_to product_path(product), class: 'product-teaser' do %>
<div>
<h2><%= product.name %></h2>
<p><%= product.description %></p>
<b><%= product.price %></b>
</div>
<% end %>

This is a perfect place to start refactoring our application to use matestack. It's easy to start from the inside out, first replacing parts of your UI with components. As partials already are used to structure your UI in smaller reusable parts they are a perfect starting point. So let's refactor our product teaser into a custom component.

After successfully following the installation guide we can start.

Start by creating a file called teaser.rb in app/matestack/components/products/teaser.rb. Placement of this file is as you see similar to our partial. In this file we implement our component in pure ruby as follows:

class Components::Products::Teaser < Matestack::Ui::Component
requires :product
def response
link path: product_path(product), class: 'product-teaser' do
div do
heading size: 2, text: product.name
paragraph text: product.description
b text: product.price
end
end
end
end

We inherit from Matestack::Ui::Component to create our teaser component. As it should display product informations it requires a product. We can access this product through a getter method product. Now we have now a teaser component, but in order to use it we have to register it and include our registration in our ApplicationController.

Let's register our component by creating a component registry in app/matestack/components/registry.rb.

module Components::Registry
Matestack::Ui::Core::Component::Registry.register_components(
product_teaser: Components::Products::Teaser
)
end

The last things we have to do before we can use our component is to include our registry in the ApplicationController.

class ApplicationController < ActionController::Base
include Matestack::Ui::Core::ApplicationHelper # see installation guide for details
include Components::Registry
end

and make Matestack matestack_component helper available in views by also including the Matestack::Ui::Core::ApplicationHelper in our ApplicationHelper.

app/helpers/application_helper.rb

module ApplicationHelper
include Matestack::Ui::Core::ApplicationHelper
end

Now we can use our Matestack component in our view. Replacing the render partial: call from before with a call to matestack_component on our landing page.

app/views/static/index.html.erb.

<!-- before -->
<%= render partial: 'products/teaser', collection: @products, as: :product %>
<!-- using our component -->
<%= @products.each do |product| %>
<%= matestack_component :product_teaser, product: product %>
<% end %>