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theory
  OOP

  ruby
    inheritance
    classes
    modules
    objects
    private/public/protected
    super

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SAINT DOCTRINE:

• TDD, start with integrations tests 
• Use Service Objects for interaction between several models 
• all texts to i18n (in multilingual projects) 
• all bootstrap elements to own CSS classes (grids & utilities are exeptions) 
• use BEM methodology for naming CSS classes 
• no CSS in HTML 
• no JavaScript in HTML 
• no new gems/libraries without agreement 

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User.all.each do |user|
  user.attachments.each do |attachment|
    unless ["contract", "terms_and_conditions", "consumer_credit_form", "consent_personal_data_processing", "registration_contract", "terms_and_conditions_provision", "loan_application", "terms_and_conditions_no_sign", "factura"].any? { |word| attachment.filename.include?(word) }
      attachment.user_id = attachment.attachable_id
      attachment.save
    end
  end
end

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$(function() {
  'use strict';

  var updateWidgetPreview = function() {
    var iframe = $('#previewiframe');
    var form = $("#previewform");
    if (form.length == 0) {
      form = $("<form/>", {id: "previewform", action: iframe.data('url'), target: "previewiframe", method: "GET"});
      form.hide();
      form.appendTo(document.body);

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# This file should contain all the record creation needed to seed the database with its default values.
# The data can then be loaded with the rake db:seed (or created alongside the db with db:setup).
#
# Examples:
#
#   cities = City.create([{ name: 'Chicago' }, { name: 'Copenhagen' }])
#   Mayor.create(name: 'Emanuel', city: cities.first)

users = User.create([{"email" => "user1@email.com", "password" => "12345678", "password_confirmation" => "12345678"}, {"email" => "user2@email.com", "password" => "12345678", "password_confirmation" => "12345678"}])
DietaryPreference.create([{name: "I`ll eat it all!",                  picture: File.open(Rails.root.join('test', 'fixtures', 'files', 'preference.png'))},