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document.write("<\/pre>\n");
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class<\/span> Book < ActiveRecord::Base<\/span><\/span><\/span>\n");
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document.write("  validates_presence_of<\/span> :title<\/span>\n");
document.write("  has_and_belongs_to_many<\/span> :authors<\/span>, :join_table<\/span> => "books_authors"<\/span>, :order<\/span> => "authors.name"<\/span>\n");
document.write("  has_and_belongs_to_many<\/span> :tags<\/span>, :order<\/span> => "tags.name"<\/span>\n");
document.write("  attr_accessor<\/span> :authors_s<\/span>, :tags_s<\/span>\n");
document.write("  before_save<\/span> :process_attributes<\/span>\n");
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document.write("  # lookup authors_s and tags_s<\/span>\n");
document.write("  def<\/span> after_find<\/span><\/span>\n");
document.write("    self<\/span>.authors_s =<\/span> self<\/span>.authors.collect { <\/span>|author<\/span>| author.name }.join(", "<\/span>)\n");
document.write("    self<\/span>.tags_s =<\/span> self<\/span>.tags.collect { <\/span>|tag<\/span>| tag.name }.join(", "<\/span>)\n");
document.write("  end<\/span>\n");
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document.write("  private<\/span> \n");
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document.write("    # process authors and tag attributes for allow use of strings and arrays<\/span>\n");
document.write("    def<\/span> process_attributes<\/span><\/span>\n");
document.write("      self<\/span>.authors =<\/span> array_to_string(self<\/span>.authors_s, "Author"<\/span>) unless<\/span> self<\/span>.authors_s.nil?\n");
document.write("      self<\/span>.tags =<\/span> array_to_string(self<\/span>.tags_s, "Tag"<\/span>) unless<\/span> self<\/span>.tags_s.nil?\n");
document.write("    end<\/span>\n");
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document.write("    # convert string elements split by \',\' to objects (create if needed)<\/span>\n");
document.write("    def<\/span> array_to_string<\/span>(string_array, model_name<\/span>)<\/span>\n");
document.write("      model_array =<\/span> []\n");
document.write("      model_object =<\/span> Object<\/span>.const_get(model_name)\n");
document.write("      string_array.split(","<\/span>).each do <\/span>|name<\/span>|\n");
document.write("        model_array <<<\/span> model_object.find_or_create_by_name(name.strip)\n");
document.write("      end<\/span>\n");
document.write("      model_array\n");
document.write("    end<\/span>\n");
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document.write("<\/span>end<\/span>\n");
document.write("<\/pre><\/pre>\n");
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document.write("    <\/div>\n");
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document.write("    Pastie #842144<\/a> linked directly from Pastie<\/a>.\n");
document.write("  <\/div><\/div>");