admin can upload and remove images from a campaign

app/controllers/admin/campaigns/image_controller.rb

@@ -0,0 +1,8 @@
+class Admin::Campaigns::ImageController < Admin::BaseController
+
+  def destroy
+    campaign = Campaign.find(params[:campaign_id])
+    campaign.image.purge_later
+    redirect_to edit_admin_campaign_path(campaign), notice: "Image successfully removed."
+  end
+end

app/controllers/admin/campaigns_controller.rb

@@ -9,7 +9,7 @@ def new
 
   def create
     campaign = Campaign.create(campaign_params)
-    redirect_to admin_campaigns_path
+    redirect_to admin_campaign_path(campaign)
   end
 
   def show
@@ -23,7 +23,7 @@ def edit
   def update
     campaign = Campaign.find(params[:id])
     campaign.update(campaign_params)
-    redirect_to admin_campaigns_path
+    redirect_to admin_campaign_path(campaign)
   end
 
   def destroy
@@ -34,6 +34,6 @@ def destroy
 
   private
     def campaign_params
-      params.require(:campaign).permit(:title, :description, :image_url)
+      params.require(:campaign).permit(:title, :description, :image)
     end
 end

app/models/campaign.rb

@@ -1,5 +1,6 @@
 class Campaign < ApplicationRecord
   has_rich_text :description
+  has_one_attached :image
 
   has_many :campaign_users
   has_many :users, through: :campaign_users

app/models/user.rb

@@ -2,7 +2,7 @@ class User < ApplicationRecord
   validates :username, uniqueness: true, presence: true
   validates_presence_of :password, :first_name, :last_name, :email
 
-  has_secure_password
+  has_secure_password 
 
   enum role: [:default, :admin]
 

app/views/admin/campaigns/edit.html.erb

@@ -4,6 +4,14 @@
   <div class="field">
     <%= form.label :title %>
     <%= form.text_area :title %>
+    <%= form.label :image %>
+    <% if @campaign.image.present? %>
+      <div id="<%= dom_id(@campaign, :image) %>">
+        <%= image_tag @campaign.image.representation(resize_to_limit: [320, 180]) %>
+        <%= link_to "Remove Image", admin_campaign_image_path(@campaign), data: { turbo_method: :delete, turbo_confirm: "Are you sure?" } %>
+      </div>
+    <% end %>
+    <%= form.file_field :image %>
     <%= form.label :description %>
     <%= form.rich_text_area :description %>
     <%= form.submit "Update Campaign" %>

app/views/admin/campaigns/index.html.erb

@@ -3,7 +3,7 @@
 <div class='campaigns'>
   <% @campaigns.each do |campaign| %>
     <div id="<%= campaign.title.parameterize %>">
-      <p><%= image_tag campaign.image_url if campaign.image_url %></p>
+      <p><%= image_tag campaign.image if campaign.image.present? %></p>
       <p><h2><%= campaign.title %></h2></p>
       <p><%= campaign.description %></p>
       <p><%= link_to "Details", admin_campaign_path(campaign) %></p>

app/views/admin/campaigns/new.html.erb

@@ -4,6 +4,8 @@
     <div class="field">
       <%= form.label :title %>
       <%= form.text_area :title %>
+      <%= form.label :image %>
+      <%= form.file_field :image %>
       <%= form.label :description %>
       <%= form.rich_text_area :description %>
       <%= form.submit "Create Campaign" %>

app/views/admin/campaigns/show.html.erb

@@ -4,6 +4,9 @@
   <div>
     <p><h2><%= @campaign.title %></h2></p>
   </div>
+  <div>
+    <%= image_tag @campaign.image if @campaign.image.present? %>
+  </div>
   <div>
     <p><%= @campaign.description %></p>
   </div>

app/views/admin/dashboard/index.html.erb

@@ -4,7 +4,7 @@
 <div class='campaigns'>
   <% @campaigns.each do |campaign| %>
     <div id="<%= dom_id(campaign) %>">
-      <p><%= image_tag campaign.image_url %></p>
+      <p><%= image_tag campaign.image.representation(resize_to_limit: [320, 180]) if campaign.image.present? %></p>
       <p><h2><%= campaign.title %></h2></p>
       <p><%= campaign.description %></p>
       <p><%= link_to "Details", admin_campaign_path(campaign) %>

app/views/welcome/index.html.erb

@@ -11,7 +11,7 @@
   <% @campaigns.each do |campaign| %>
     <div id="<%= dom_id(campaign) %>">
       <div>
-        <p><%= image_tag campaign.image_url %></p>
+        <p><%= image_tag campaign.image.representation(resize_to_limit: [320, 180]) if campaign.image.present? %></p>
       </div>
       <div>
         <p><h2><%= campaign.title %></h2></p>

config/routes.rb

@@ -8,7 +8,9 @@
 
   namespace :admin do
     get "/dashboard", to: "dashboard#index"
-    resources :campaigns
+    resources :campaigns do
+      resources :image, only: [:destroy], module: :campaigns
+    end
     resources :characters, except: [:new, :create]
   end
 

db/migrate/20230602145506_create_campaigns.rb

@@ -2,7 +2,6 @@ class CreateCampaigns < ActiveRecord::Migration[7.0]
   def change
     create_table :campaigns do |t|
       t.string :title
-      t.string :image_url
 
       t.timestamps
       # ! This migration also creates a rich text field called description

spec/factories/campaign.rb

@@ -2,6 +2,6 @@
   factory :campaign do
     title { "#{Faker::Cosmere.surge}-#{Faker::Cosmere.surge}-#{Faker::Number.hexadecimal(digits: 4)}" }
     description { Faker::Quotes::Shakespeare.hamlet_quote + Faker::Number.hexadecimal(digits: 4) }
-    image_url { Faker::Placeholdit.image }
+    image { Rack::Test::UploadedFile.new('spec/fixtures/files/kingdom.webp', 'image/webp') }
   end
 end

spec/features/admin/campaigns/admin_can_create_campaigns_spec.rb

@@ -19,7 +19,7 @@
 
       find(:xpath, "//\*[@id='campaign_description_trix_input_campaign']", visible: false).set('Campaign Description')
       click_on "Create Campaign"
-      expect(current_path).to eq(admin_campaigns_path)
+      expect(current_path).to eq(admin_campaign_path(Campaign.last))
       expect(page).to have_content("Campaign Title")
       expect(page).to have_content("Campaign Description")
     end

spec/features/admin/campaigns/admin_can_edit_existing_campaign_spec.rb

@@ -21,7 +21,7 @@
       find(:xpath, "//\*[@id='campaign_description_trix_input_campaign_#{campaign.id}']", visible: false).set('Changed field')
       click_on 'Update Campaign'
 
-      expect(current_path).to eq(admin_campaigns_path)
+      expect(current_path).to eq(admin_campaign_path(campaign))
 
       expect(page).to have_content('Totally Edited')
       expect(page).to have_content('Changed field')