huhn511 · December 15, 2018 14:46
diff --git a/_model_form.html.erb b/_model_form.html.erb
 <div class="field">
  <%= form.label :image %>
  <%= form.file_field :image %>
 </div>
diff --git a/model_controller.rb b/model_controller.rb
 def model_params
  params.require(:model).permit(:image, ...)
 end
diff --git a/model_show.html.erb b/model_show.html.erb
 <%= image_tag @model.image %>
diff --git a/model_with_image.rb b/model_with_image.rb
 class Model < ApplicationRecord
    has_one_attached :image
 end
	def model_params
	params.require(:model).permit(:image, ...)
	end