murdoch

Polymorphic Associations reversed

It's pretty easy to do polymorphic associations in Rails: A Picture can belong to either a BlogPost or an Article. But what if you need the relationship the other way around? A Picture, a Text and a Video can belong to an Article, and that article can find all media by calling @article.media

This example shows how to create an ArticleElement join model that handles the polymorphic relationship. To add fields that are common to all polymorphic models, add fields to the join model.

murdoch

$(function() {
  $('a[href*=#]:not([href=#])').click(function() {
    if (location.pathname.replace(/^\//,'') == this.pathname.replace(/^\//,'') && location.hostname == this.hostname) {
      var target = $(this.hash);
      target = target.length ? target : $('[name=' + this.hash.slice(1) +']');
      if (target.length) {
        $('html,body').animate({
          scrollTop: target.offset().top
        }, 1000);
        return false;

murdoch

# Stick form in home.html.erb

<h2>Sign up</h2>

<%= form_for(resource, :as => resource_name, :url => registration_path(resource_name)) do |f| %>
  <%= devise_error_messages! %>

  <div><%= f.label :email %><br />
  <%= f.email_field :email %></div>

murdoch

expect { thing.destroy }.to change(Thing, :count).from(1).to(0)
expect { thing.tax = 5 }.to change { thing.total_price }.by(5)
expect { thing.save! }.to raise_error
expect { thing.symbolize_name }.to change { thing.name }.from(String).to(Symbol)

murdoch

Devise by default has a configuration named:

config.allow_unconfirmed_access_for

You can set it in your devise initializer and it will allow the user to access any page, any time, while still unconfirmed.

Then, for the pages you require confirmation, you can simply add a before filter:

     before_filter :only_confirmed

murdoch

def after_sign_in_path_for(resource_or_scope)
  if first_login
    getting_started_path
  else
    super
  end
end

def first_login
  current_user.sign_in_count == 0

murdoch

# if we have confirmable module turned on
def after_inactive_sign_up_path_for(resource)
  "http://google.com"
end

murdoch

protected

  def stored_location_for(resource)
    nil
  end

  def after_sign_in_path_for(resource)
    if condition_foo
      redirect_to foo_url
    elsif condition bar

murdoch

class SelfMaker
  def yet_what_is_self?
    self.class.class_eval do
      mirror(self, "Inside class_eval of SelfMaker#yet_what_is_self?")
    end
    
    instance_eval do
      mirror(self, "Inside instance_eval of SelfMaker#yet_what_is_self?")
    end
    

murdoch

#Behold, the nav_link:

The nav_link helper works just like the standard Rails link_to helper, but adds a 'selected' class to your link (or its wrapper) if certain criteria are met. By default, if the link's destination url is the same url as the url of the current page, a default class of 'selected' is added to the link.

For full usage details, see: http://viget.com/extend/rails-selected-nav-link-helper

Drop nav_link_helper.rb into app/helpers in your Rails 3.x app and enjoy.

#About this fork