Act As Taggable Error - ruby-on-rails

Question

I have tags showing in my category show view. When someone views the Mobile Phones Category they will see tags at the top such as iphone, apple, 16gb, black and ect. When someone clicks on 16gb, it should show every item with 16gb tagged in it.
I've worked on this error for 12 hours and can't fix it.
When someone clicks on a tag i get this error.
ActiveRecord::RecordNotFound in CategoriesController#show
Couldn't find Category with 'id'=
def set_category
#category = Category.find(params[:id])
end
I can't figure out how to fix it?
Im using act_as_taggable gem.
Here is category controller
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
Here is my category show view.
<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), 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>
Here is routes. So you can see how the tags are routed.
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/:tags', to: 'categories#show', as: :tag
Schema.rb
ActiveRecord::Schema.define(version: 20150731101116) do
create_table "categories", force: :cascade do |t|
t.string "name"
t.string "ancestry"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
add_index "categories", ["ancestry"], name: "index_categories_on_ancestry"
create_table "items", force: :cascade do |t|
t.string "title"
t.decimal "price"
t.text "description"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer "user_id"
t.string "image_file_name"
t.string "image_content_type"
t.integer "image_file_size"
t.datetime "image_updated_at"
t.integer "category_id"
end
add_index "items", ["user_id", "created_at"], name: "index_items_on_user_id_and_created_at"
add_index "items", ["user_id"], name: "index_items_on_user_id"
create_table "taggings", force: :cascade do |t|
t.integer "tag_id"
t.integer "taggable_id"
t.string "taggable_type"
t.integer "tagger_id"
t.string "tagger_type"
t.string "context", limit: 128
t.datetime "created_at"
end
add_index "taggings", ["tag_id", "taggable_id", "taggable_type", "context", "tagger_id", "tagger_type"], name: "taggings_idx", unique: true
add_index "taggings", ["taggable_id", "taggable_type", "context"], name: "index_taggings_on_taggable_id_and_taggable_type_and_context"
create_table "tags", force: :cascade do |t|
t.string "name"
t.integer "taggings_count", default: 0
end
add_index "tags", ["name"], name: "index_tags_on_name", unique: true
create_table "users", force: :cascade do |t|
t.string "username"
t.string "email"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.string "password_digest"
t.string "remember_digest"
t.boolean "admin", default: false
t.string "activation_digest"
t.boolean "activated", default: false
t.datetime "activated_at"
t.string "reset_digest"
t.string ">"
t.datetime "reset_sent_at"
t.string "avatar_file_name"
t.string "avatar_content_type"
t.integer "avatar_file_size"
t.datetime "avatar_updated_at"
t.text "description"
end
add_index "users", ["email"], name: "index_users_on_email", unique: true
end

Answer 1

actually you are sending only params[:tag] butto find category you have to send id as well, try following
Change
<%= link_to tag.name, tag_path(tag.name), class: css_class %>
To
<%= link_to tag.name, tag_path(tag.name, id: #category.id), class: css_class %>
and check again

Answer 2

When a user clicks on a tag tag.name is put as a parameter and the route goes to the show action of the categories controller, naming the parameter tags. The show action has a before_action method set which tries to find the relevant Category object based on the id which it gets from the parameter called id.
There's no parameter called id when the set_category method runs after the user clicks on a tag.
Change the method to this
def set_category
if params[:tag]
#category = Category.find_by_name(params[:tag])
end
if params[:id]
#category = Category.find(params[:id])
end
end
With this code the show action will work if you send the name of the tag as a parameter called :tag or the id as a parameter called :id