uploading image or file in ruby on rails 4 - ruby-on-rails-4

Question

Here, I want a clear concept about uploading file or image without using any gemfile(Ex: peperclip, carrierwave etc).
Previously, I did some work. Where i can upload images in "/assets/images" folder. But i could't see images when i call it in my show page(there was only a placeholder of break image).
here is the screenshot of show page:
how can i show those images in my show.html.erb file?
Here is my ImagesController.rb file:
class ImagesController < ApplicationController
before_action :set_image, only: [:show, :edit, :update, :destroy]
# GET /images
def index
#images = Image.all
end
# GET /images/1
def show
end
# GET /images/new
def new
#image = Image.new
end
# GET /images/1/edit
def edit
end
# POST /images
def create
#image = Image.new(image_params)
if params[:image].present?
file = params[:image][:picture]
File.open(Rails.root.join('app','assets', 'images', file.original_filename), 'wb') do |f|
f.write(file.read)
end
end
respond_to do |format|
if #image.save
format.html { redirect_to #image, notice: 'Image was successfully created.' }
format.json { render action: 'show', status: :created, location: #image }
else
format.html { render action: 'new' }
format.json { render json: #image.errors, status: :unprocessable_entity }
end
end
end
def update
respond_to do |format|
if #image.update(image_params)
format.html { redirect_to #image, notice: 'Image was successfully updated.' }
format.json { head :no_content }
else
format.html { render action: 'edit' }
format.json { render json: #image.errors, status: :unprocessable_entity }
end
end
end
# DELETE /images/1
def destroy
#image.destroy
respond_to do |format|
format.html { redirect_to images_url }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_image
#image = Image.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def image_params
params.require(:image).permit(:name)
end
end
Here is my show.html.erb file:
<p><%= #image.name %></p>
<p><%= image_tag #image.picture %></p>
Here is my schema.rb file:
ActiveRecord::Schema.define(version: 20140725043842) do
create_table "images", force: true do |t|
t.string "name"
t.string "picture"
t.datetime "created_at"
t.datetime "updated_at"
end
end
please tell me, if you need more information about my project.
please give me some advice. I want a clear understand about uploading image/file and show them without using gemfile.

Answer 1

You have to upload images to a folder that doesn't need precompiling to be show, as assets do. Try uploading them to public folder.
Also you might want to read about the asset pipeline and why aren't they displaying:
http://guides.rubyonrails.org/asset_pipeline.html