Paperclip for images draft.

Paperclip rough draft

rails new app 
rake db:create; rake db:migrate

Added new input fied so you can add photos.

If you have  folder you can just click on the button and we will upload it

brew install imagemagick
//when you upload file this will handle the different size rendering

We then have to use a gem paperclip

//go into directory
$sublime .

//go into your gem file
$gem 'paperclip'

run bundle

To all a model to use a paperclip

rails generate papeclip "nameof model" "name of attachment"
rails generate paperclip User image
it creates a migration file and upload the tables
if you look into your table you will see a new migraction 
run 
rake db:migrate

Now you have to worry about the form
You will go to user form and add to the bottom of the form for
<div>
<%= f.file_field :image%>
</div>
//creates an input field with a type of file


Form_for will give you specific names and title for you field

After you try to upload you will get a mass assignment area.
So you will have to add image to user.rb


class User <ActiveRecord::Base
attr_accessible :name, :image

has_attached_file :image, 
  :styles => { :medium => "300x300>", 
  :thumb => "100x100>" }, 
  :default_url => "/images/:style/missing.png"
end


Nes you have to go to show.htmleerb to show image


<%= @user.name %>
<%= image_tag(@user.image.url(:thumb)) %> //using rails helper image_tag
</p>
//the image is placed into the public folder and system paperclip as placed our image. 
//allows paperclip to know how to handle this. 


If you want to push to heroku you have to do a different thing
You got to a folder that doesn't have a git repo

STEPS FOR HEROKU
git init

heroku create
//you have to do change in the application.rb
config.assets.initialize_on_precompile = false


git add .
git commit -m 'update'

git push heroku master

When you push things to heorku you have to keep in mind that images do not save so you have to use a third 
party server such as amazon web service.

heroku run db:migrate
heroku open
//it will show image

heroku reset
// this will 

We are interesed in Amazon Simple Storage Service and we will be interested in S3
we are interested in buckets
each bucket have their own file storage system

Go into gemfile 
gem 'aws-sdk'

go into terminal
$bundle


When you get setup with s3 you have to create a unique bucket.
you pick US standard region and press create

you need to know bucket name and a key
you go to account activity to 
you goto account and security credentials to see what your keys are
they will also give you your access token

Inside of development.rb if you want to run locally you need to put the info

##this can go in a gist title Paperclip
## place this in development.rb to run locally
## place this in production.rb to run heroku

config.paperclip_defaults = {
  :storage => :s3,
  :s3_credentials => {
    :bucket => ENV['S3_BUCKET_NAME'],
    :access_key_id => ENV['AWS_ACCESS_KEY_ID'],
    :secret_access_key => ENV['AWS_SECRET_ACCESS_KEY']
  }
  
  
  Inside of production.rb if you want to run locally you need to put the info
  
  $ sublime ./bashrc
  in bash profile you can put 
  
  #--------------
  ##AWS KEYS
  #--------------
  export AWSKEY='kry'
  export AWS_SECRET-KEY=' '
  export ...
  
  
  you then have to reload you terminal
  
  $reload
  
  You then need to fix your initializers 
  found in config
  
  mkfile paperclip.rb
  And inseert the following:
  Paperclip::Attachment.default_options[:url] = ':s3_domain_url'
  Paperclip::Attachment.default_options[:path] = '/:class/:attachment/:id_partition/:style/:filename'


the setting for this is usually serialize. We will want to change the form to undersatnd that we will have images


This will be in index.html.erb
<%form_for(@user, html: {multipart: true}) do |f| %>
<%= f.label :name %> 
<%= f.text_field :name %>
<%=f.file_field :image %>
<%= f.submit %>
<% end %>