SEO tags in rails

admin-seo-_seo_form.html.erb

# admin/seo/_seo_form.html.erb

<div class='full-inputs'>
  <%= simple_form_for seo, remote: true, url: admin_update_seo_path(seo) do |f| %>
  <%= f.input :content, required: true, as: :text, input_html: {rows: 2, maxlength: "#{ seo.name == 'title' ? '70' : '155' }"}, label: seo.name.try(:humanize), hint: "<span class='character-count green'> </span> #{seo.name.try(:humanize)} should be no longer than #{ seo.name == 'title' ? '70' : '155' }  characters" %>
  <div class='text-center'>
  <button class='btn btn-primary'>Update</button>
  <a href="#<%= page %>" class='cancel-seo btn btn-warning' data-attribute="<%=f.object.id %>"> Cancel</a>

  <% end %>
</div>
<script>
  $('.cancel-seo').click(function() {
      $("#edit_meta_tag_<%= seo.id %>").remove();
      $("#tag-<%= seo.id%> i.icon-pencil").show();
    });
  $('#edit_meta_tag_<%= seo.id %> textarea').keyup(function(){
    var max=$(this).attr('maxlength');
    var valLen=$(this).val().length;
    $('#edit_meta_tag_<%= seo.id %> .character-count').text( valLen+'/'+max)
  });

</script>

admin-seo-edit.js.erb

# admin/seo/edit.js.erb

$("#tag-<%= @seo.id%> i.icon-pencil").hide();
$("#tag-<%= @seo.id%>").append("<%= j(render 'seo_form', seo: @seo, page: params[:page]) %>");

admin-seo-index.html.erb

# admin/seo/index.html.erb

<div class='page-header'>
  <h1> SEO Tags</h1>
</div>

<ul class='unstyled'>
  <% site_map_pages.each do |page| %>
    <% path = Rails.application.routes.recognize_path(send("#{page.first}_url")) %>
    <% tags = MetaTag.find_all_by_method_and_controller(path[:action], path[:controller]) %>
    <div id="<%= page.second.parameterize %>" class='well'>
      <ul class='unstyled'>
        <li><h3><%= link_to page.second, send("#{page.first}_path"), target: "_blank"%></a></h3></li>
        <% tags.each do |tag| %>
          <li id="tag-<%= tag.id %>"><%= link_to admin_edit_seo_path(tag, page: page.second.parameterize), remote: true, class: 'edit-seo', data: {attributes: tag.id} do %><i class='icon-pencil'></i><% end %><strong> <%= tag.tag_type.try(:humanize)  %> <%= tag.name.try(:humanize) unless tag.name.downcase == 'title' %> : </strong> <span class='seo-content'><%= tag.content %></span>
        <%end %>

      </ul>
    </div>
  <% end %>
</ul>

admin-seo-update.js.erb

# admin/seo/update.js.erb
$("#edit_meta_tag_<%=@seo.id %>").remove();
$("#tag-<%= @seo.id%> i.icon-pencil").show();
$("#tag-<%= @seo.id%>").append("<span class='green'> <i class='icon-ok'> </i> Updated Successfully</span>");
$("#tag-<%= @seo.id%> span.seo-content").html("<%=@seo.content.try(:html_safe) %>")

admin-seo_controller.rb

# admin/seo_controller.rb

class Admin::SeoController < Admin::AdminController

  skip_before_filter :permit_seo!
  
  def index
    @metatags = MetaTag.all
  end

  def edit
    @seo = MetaTag.find(params[:id])
    respond_to do |format|
      format.html
      format.xml
      format.js
    end
  end

  def update
    @seo = MetaTag.find(params[:id])
    if @seo.update_attributes(params[:meta_tag])
      respond_to do |format|
        format.html
        format.xml
        format.js
      end
     else
      @errors = true
      render :edit
    end

  end

end

admin_controller.rb

  # If you want to restrict access to admin's with seo role to  only hit seo controller
  before_filter :permit_seo!
  
  private
  def permit_seo!
    if current_user.has_role? :seo
      redirect_to admin_seo_path
    end
  end

application.html.erb

  <% unless @meta_data.blank? %>
    <% @meta_data.each do |md| %>
      <% if md.tag_type == "meta" %>
        <meta name ="<%= md.name %>" content="<%= md.content %>" />
      <% else %>
        <%= content_tag md.tag_type, md.content %>
      <% end %>
    <% end %>
  <% else %>
    <title><%= content_for?(:html_title) ? yield(:html_title) : 'My default title' %> - My site name.</title>
    <meta name="description" content="<%= (html_description = yield :html_description) ? html_description : 'My site description' %>">
  <% end %>

application_controller.rb

...  
  before_filter :get_meta_tags

    def get_meta_tags
      @meta_data = MetaTag.find_all_by_method_and_controller(request.path_parameters[:action], request.path_parameters[:controller])
    end

...

create_meta_tags_migration.rb

  create_table "meta_tags", :force => true do |t|
    t.string   "tag_type"
    t.string   "name"
    t.string   "method"
    t.string   "content"
    t.string   "controller"
    t.datetime "created_at"
    t.datetime "updated_at"
    t.integer  "article_id"
  end

meta_tag.rb

class MetaTag < ActiveRecord::Base
  attr_accessible :controller, :method, :tag_type, :name, :content, :article_id
end

routes.rb

namespace :admin do
  get '/seo', to: 'seo#index', as: :seo
  get '/seo/:id', to: 'seo#edit', as: :edit_seo
  put '/seo/:id/update', to: 'seo#update', as: :update_seo
end