Hi, I have performed the cookbook tutorial. Before tailoring the views and controllers, when I put in the model recipe.rb: validates_uniqueness_of :title validates_length_of :title, :within => 1...20 And I tried to introduce some new recipe without the above conditions I got the message: --------------------------------------------------- New recipe 1 error prohibited this category from being saved There were problems with the following fields: * Name is too short (minimum is 1 characters) Name Back ---------------------------------------------------- So, just fine. But after tailoring the views and controller I''m not longer able to get this, just this one: NoMethodError in Recipe#create Showing app/views/recipe/new.rhtml where line #27 raised: You have a nil object when you didn''t expect it! You might have expected an instance of Array. The error occured while evaluating nil.each Extracted source (around line #27): 24: <p> 25: <b>Categoria:</b><br/> 26: <select name="recipe[category_id]"> 27: <% @categories.each do |category| %> 28: <option value="<%= category.id %>"> 29: <%= category.name %> 30: </option> Why the sentences in the model Some ideas? BR Antonio -- ====Por favor, si me mandas correos con copia a varias personas, pon mi direcci?n de correo en copia oculta (CCO), para evitar que acabe en montones de sitios, eliminando mi privacidad, favoreciendo la propagaci?n de virus y la proliferaci?n del SPAM. Gracias. ----- If you send me e-mail which has also been sent to several other people, kindly mark my address as blind-carbon-copy (or BCC), to avoid its distribution, which affects my privacy, increases the likelihood of spreading viruses, and leads to more SPAM. Thanks. =====