class CreateShortenedUrlsTable

# File lib/generators/url_shortner/templates/migration.rb, line 2
def change
  create_table :shortened_urls do |t|
    # we can link this to a user for interesting things
    # t.integer :owner_id
    # t.string :owner_type, limit: 20

    # the real url that we will redirect to
    t.text :original_url, null: false, length: 2083

    t.text :short_url, null: false, length: 2083

    # the unique key
    # t.string :unique_key, limit: 10, null: false

    # a category to help categorize shortened urls
    # t.string :category

    # how many times the link has been clicked
    # t.integer :use_count, null: false, default: 0

    # valid until date for expirable urls
    # t.datetime :expires_at

    t.timestamps
  end

  # we will lookup the links in the db by key, urls and owners.
  # also make sure the unique keys are actually unique
  # add_index :shortened_urls, :unique_key, unique: true
  add_index :short_url, :url, length: 2083
  # add_index :shortened_urls, [:owner_id, :owner_type]
  # add_index :shortened_urls, :category
end