Rails: Image Uploading Site. Home page - ruby-on-rails

Question

class PhootosController < ApplicationController
before_action :logged_in_user
def index
#phootos = Phooto.all.sample(1)
end
def new
end
def show
#phooto = Phooto.find(params[:id])
end
def create
#phooto = current_user.phootos.build(phooto_params)
if #phooto.save
flash[:success] = "Photo created!"
redirect_to uploads_url
else
redirect_to root_url
end
end
def favorite
#phooto = Phooto.find params[:id]
if request.put?
current_user.favorites << #phooto
redirect_to :back, notice: 'You successfully favorited #{#phooto.name}'
elsif request.delete?
current_user.favorites.delete(#phooto)
redirect_to :back, notice: 'You successfully unfavorited #{#phooto.name}'
else
redirect_to :back, notice: 'Nothing happened.'
end
end
def feed
#favorites = current_user.favorites.all
end
def uploaded
#phootos = current_user.phootos.all
end
private
def phooto_params
params.require(:phooto).permit(:picture)
end
end
show.html.erb
<p><strong>Picture:</strong></p>
<%= image_tag(#phooto.picture) %>
<%= link_to("< Previous", #phooto.previous) if #phooto.previous %>
<%= link_to("Next >", #phooto.next) if #phooto.next %>
<% if current_user %>
<%= link_to "favorite", favorite_phooto_path(#phooto), method: :put %>
<%= link_to "unfavorite", favorite_phooto_path(#phooto), method: :delete %>
<% end %>
www.example.com/photos/1
Professional websites have the homepage www.example.com load with a photo already displayed. Then when you click next/previous, you are routed to www.example.com/photos/#{photo_id}
How do I get my website to do this? I also want it setup so that each day a different random photo is displayed in the homepage.

Answer 1

If you want to show a random photo on the homepage, you need the following:
#config/routes.rb
resources :photos, only: [:index, :show]
#app/controllers/photos_controller.rb
class PhotosController < ApplicationController
def index
random = ActiveRecord::Base.connection.adapter_name == 'MySQL' ? "RAND()" : "RANDOM()"
#phooto = Photo.order(random).first
end
def show
#phooto = Photo.find params[:id]
end
end
Refs:
https://stackoverflow.com/a/2536743/1143732 (adapter)
https://stackoverflow.com/a/25577054/1143732 (random)
--
This will allow you to populate the #phooto variable in both the index and show actions;
#app/views/photos/index.html.erb
<%= render #phooto %>
#app/views/photos/show.html.erb
<%= render #phooto %>
#app/views/photos/_photo.html.erb
<p><strong>Picture:</strong></p>
<%= image_tag(photo.picture) %>
<%= link_to("< Previous", photo.previous) if #phooto.previous %>
<%= link_to("Next >", photo.next) if #phooto.next %>
<% if current_user %>
<%= link_to "favorite", favorite_phooto_path(phooto), method: :put %>
<%= link_to "unfavorite", favorite_phooto_path(phooto), method: :delete %>
<% end %>
You'll be able to work out the rest.
In regards rendering a new random image each day, you'll have to store the "random" value each time the day changes.
This would be best done with a cron job, invoking a rake task:
#lib/tasks/new_random.rb
namespace :random do
task :generate => :environment do
# save random for the day (maybe in a model or redis)
end
end