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class State < ActiveRecord::Base
  def self.default
    find_by(default: true)
  end

  def make_default!
    PgLock.new(name: 'set_state_default').lock do
      State.update_all(default: false)
      update(default: true)
    end

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# app/drops/invoice_drop.rb

class InvoiceDrop < Liquid::Drop
  delegate :days_late, :priceinbtw, :print_date, :id, :late, :unpayed, to: :invoice

  attr_reader :invoice

  def initialize(invoice)
    @invoice = invoice
  end

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def authenticate
  if params[:username].present? && params[:password].present?
    inn = Inn.find_by(username: params[:username])
    
    if inn
      authenticated = inn.authenticate(params[:password])
      
      if authenticated
        redirect_to inns_url, notice: 'You are now logged in.'
        return

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resource :report do
  resources :subjects, only: :index
end

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Rails.application.routes.draw do
  resources :categories
  devise_for :admins
  devise_for :users
  resources :users
  
  namespace :admin do
    resources :categories
  end
  

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if params[:friend_id]
  friend = User.find(params[:friend_id])
else
  # ...
end

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urls.each do |url|
  begin
    open(url)
    # do some nokogiri things
  rescue OpenURI::HTTPError
    # log the error
  end
end

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class CreateGroupLocations < ActiveRecord::Migration
  def change
    create_table :group_locations do |t|
      t.belongs_to :address, index: true, foreign_key: true
      t.belongs_to :group, index: true, foreign_key: true

      t.timestamps null: false
    end
  end
end

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class CreateCategories < ActiveRecord::Migration
  def change
    create_table :categories do |t|

      t.string :name

      t.timestamps
    end
  end
end

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class NotePolicy < ApplicationPolicy
	
  # For index action
  class Scope
    attr_reader :user, :scope
    def initialize(user, scope)
      @user = user
      @scope = scope
    end