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Intro to the Console for Randy

• cd (changes directory)

• cd ~ (changes to home directory)

• cd .. (moves up one directory)

• ls (lists files in folder)

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Optimizing Rails Static Assets on Heroku Cedar

Serving Rails static assets is hard, especially on Heroku Cedar where Heroku forces Rails to serve static assets itself (which isn't particularly performant nor worth your dyno-dollar)---this is different than Heroku Bamboo which used Varnish and is no more. To make the best of the situation, I highly recomend:

1. Using the Heroku-Deflater gem which will selectively gzips assets (it gzips text-based files; and excludes images or binary files, which can actually be bigger when gzipped)

2. Configure your production environment to set cache-control headers and get out of denial about how static assets are being served on Heroku Cedar

3. Use AWS Cloudfront (or a CDN of your choosing) to serve the assets. Cloudfront is great because you can use the same Distribution

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#Model 

@user.should have(1).error_on(:username) # Checks whether there is an error in username 
@user.errors[:username].should include("can't be blank")  # check for the error message 

#Rendering
response.should render_template(:index)

#Redirecting 
response.should redirect_to(movies_path)

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# app/jobs/example_job.rb

class ExampleJob < ActiveJob::Base
  queue_as :default

  rescue_from(ActiveRecord::RecordNotFound) do
    retry_job wait: 1.minute, queue: :default
  end

  def perform(param_1, param_2)

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Notes

• This is a simple example of setting up Pundit with a standard and headless policy system.
• The static_controller is simply a controller that lacks a model and renders static pages, such as a home page, about page, etc.
• The secure action is just a fill-in example for a page the needs to be secure, it doesn't actually represent a common use case (i.e. you don't need a page called "secure" on a website)

Refs

• https://github.com/elabs/pundit
• https://www.sitepoint.com/straightforward-rails-authorization-with-pundit/

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class AddActivatableFieldsToModel < ActiveRecord::Migration[5.0]
  def change
    add_column :users, :archived, default: false
    add_column :users, :test, default: false
    add_column :users, :dummy, default: false
    
    add_index :users, :archived
  end
end

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class AddRolesToUserModel < ActiveRecord::Migration[5.0]
  def change
    add_column :users, :roles, :text, array: true, default: []
  end
end

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class InitialMigration < ActiveRecord::Migration[5.0]
  def change
    enable_extension "pgcrypto" unless extension_enabled?("pgcrypto")
  end
end

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Using the "dueling" keyword as an example (from the Getty keywords resource):

{:term=>"dueling", :term_id=>"15115081"}

I am trying to update an existing contribution with the dueling keyword like this:

{:file_name=>"3_312032_1.mov",
 :external_file_location=>"https://s3.amazonaws.com/wpa-getty-assets/3_312032_1.mov",
 :headline=>"Gun Fight in the Old West",

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# by default you only get 1000 objects at a time
# so you have to roll your own cursor

S3.connect!

objects = []
last_key = nil
begin
  new_objects = AWS::S3::Bucket.objects(bucket_name, :marker => last_key)
  objects    += new_objects