foodsoft/db/migrate/006_create_articles.rb

class CreateArticles < ActiveRecord::Migration[4.2]
  SAMPLE_ARTICLE_NAMES = %w[banana kiwi strawberry]

  def self.up
    create_table :articles do |t|
      t.column :name, :string, null: false
      t.column :supplier_id, :integer, null: false
      t.column :article_category_id, :integer, null: false
      t.column :unit, :string, null: false
      t.column :note, :string
      t.column :availability, :boolean, default: true, null: false
      t.column :current_price_id, :integer
    end
    add_index(:articles, :name, unique: true)

    # Create 30 sample articles...
    puts "Create 3 articles of the supplier '#{CreateSuppliers::SUPPLIER_SAMPLE}'..."
    raise "Supplier '#{CreateSuppliers::SUPPLIER_SAMPLE}' not found!" unless supplier = Supplier.find_by_name(CreateSuppliers::SUPPLIER_SAMPLE)
    raise "Category '#{CreateArticleMeta::CATEGORY_SAMPLE}' not found!" unless category = ArticleCategory.find_by_name(CreateArticleMeta::CATEGORY_SAMPLE)

    SAMPLE_ARTICLE_NAMES.each do |a|
      puts 'Create Article ' + a
      Article.create(name: a,
                     supplier: supplier,
                     article_category: category,
                     unit: '500g',
                     note: 'delicious',
                     availability: true)
    end
    raise 'Failed!' unless Article.find(:all).length == SAMPLE_ARTICLE_NAMES.length
  end

  def self.down
    drop_table :articles
  end
end