Acts_as_taggable gem. Cloud - ruby-on-rails

Question

I have a list of categories. When you click on a category lets say Computers it should only show a tag cloud of the items in that category in this case Computers. Tags from the Mobile Phone category should not be showing.
Currently my tag cloud shows all tags across all categories.
Im using the Acts_as_tagable_gem https://github.com/mbleigh/acts-as-taggable-on
How would someone go about showing only the tags inside that category?
Here is my view. Please refer to tag_cloud
<p id="notice"><%= notice %></p>
<div class = "col-md-3">
<h1>
<strong><%= #category.name %></strong>
</h1>
</div>
<div class = "col-md-9">
<div id="tag_cloud">
<% tag_cloud Item.tag_counts, %w[s m l] do |tag, css_class| %>
<%= link_to tag.name, tag_path(tag.name, id: #category.id), class: css_class %>
<% end %>
</div>
</div>
<div class = "col-md-12">
<div class="line-separator"></div>
</div>
<div class = "col-md-12">
<div id="items" class="transitions-enabled">
<% #items.each do |item| %>
<div class="box panel panel-default">
<div class="itemlisttitle"><%= item.title %></div>
<%= link_to image_tag(item.image.url (:medium)), item %>
<div class ="panel-body">
<div class = "itemlistprice">$<%= item.price %></div>
<div class = "itemlistretailer"><%= image_tag item.user.avatar(:thumb) %> Retailer: <%= link_to item.user.username, item.user %></div>
</div>
</div>
<% end %>
</div>
</div>
Routes Please refer to the last line
Rails.application.routes.draw do
resources :categories
get 'password_resets/new'
get 'password_resets/edit'
get 'sessions/new'
resources :users
get 'user_items' => 'users#show_user_items'
root 'items#home'
get 'signup' => 'users#new'
get 'show' => 'users#show'
get 'login' => 'sessions#new'
post 'login' => 'sessions#create'
delete 'logout' => 'sessions#destroy'
resources :account_activations, only: [:edit]
resources :password_resets, only: [:new, :create, :edit, :update]
resources :items
get 'items_new' => 'items#new'
get 'tags/:tag', to: 'categories#show', as: :tag
Category Controller Please refer to show action
class CategoriesController < ApplicationController
before_action :set_category, only: [:show]
before_action :admin_user, only: [:destroy, :index, :edit]
def index
#categories = Category.all
end
def show
if params[:tag]
#items = Item.tagged_with(params[:tag])
else
#items = Item.where(category_id: #category.id).order("created_at DESC")
end
end
def new
#category = Category.new
end
def edit
end
def create
#category = Category.new(category_params)
respond_to do |format|
if #category.save
format.html { redirect_to #category, notice: 'Category was successfully created.' }
format.json { render :show, status: :created, location: #category }
else
format.html { render :new }
format.json { render json: #category.errors, status: :unprocessable_entity }
end
end
end
def update
respond_to do |format|
if #category.update(category_params)
format.html { redirect_to #category, notice: 'Category was successfully updated.' }
format.json { render :show, status: :ok, location: #category }
else
format.html { render :edit }
format.json { render json: #category.errors, status: :unprocessable_entity }
end
end
end
def destroy
#category.destroy
respond_to do |format|
format.html { redirect_to categories_url, notice: 'Category was successfully destroyed.' }
format.json { head :no_content }
end
end
private
def set_category
#category = Category.find(params[:id])
end
def category_params
params.require(:category).permit(:name, :parent_id)
end
# Confirms an admin user.
def admin_user
redirect_to(root_url) unless current_user.try(:admin?)
end
end