Add: image database table, image test site, image upload support

app/controllers/test/images_controller.rb

@@ -0,0 +1,25 @@
+class Test::ImagesController < ApplicationController
+  def index
+    @images = Image.all
+    @image = Image.new
+  end
+
+  def create
+    @image = Image.new(image_params)
+
+    if @image.save
+      respond_to do |format|
+        format.turbo_stream
+        format.html { redirect_to test_images_path }
+      end
+    else
+      render :index, status: :unprocessable_entity
+    end
+  end
+
+  private
+
+  def image_params
+    params.require(:image).permit(:title, :file)
+  end
+end

app/helpers/test/images_helper.rb

@@ -0,0 +1,2 @@
+module Test::ImagesHelper
+end

app/models/image.rb

@@ -0,0 +1,5 @@
+class Image < ApplicationRecord
+  has_one_attached :file
+
+  validates :title, :file, presence: true
+end

app/views/test/images/_image.html.erb

@@ -0,0 +1,6 @@
+<div class="image-entry">
+  <h3><%= image.title %></h3>
+  <% if image.file.attached? %>
+    <%= image_tag image.file, width: 300 %>
+  <% end %>
+</div>

app/views/test/images/create.turbo_stream.erb

@@ -0,0 +1 @@
+<%= turbo_stream.prepend "images", partial: "test/images/image", locals: { image: @image } %>

app/views/test/images/index.html.erb

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+<h1>Image Upload (Test)</h1>
+
+<%= form_with model: @image, url: test_images_path, data: { turbo_stream: true } do |form| %>
+  <%= form.label :title %>
+  <%= form.text_field :title %><br>
+
+  <%= form.label :file %>
+  <%= form.file_field :file %><br>
+
+  <%= form.submit "Upload" %>
+<% end %>
+
+<hr>
+
+<h2>Uploaded Images</h2>
+<div id="images">
+  <%= turbo_frame_tag "images" do %>
+    <%= render @images %>
+  <% end %>
+</div>