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Editorial Team
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Asked: 2026-06-15T11:21:03+00:00

I made a blogpost with two entries ( title , content ) like this

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I made a blogpost with two entries (title, content) like this

rails generate scaffold Post title:string content:text

This works, but

  1. What if I want to add a new input area later? Ex. author field or something. Where do I add more fields to my Post scaffold?

  2. I made a stylesheet style.css inside my public directory. Its just sitting there. How do I link it to my file in app/views/post/new.html.erb for example?

  3. Where can I learn all the tweaks for scaffolding a specific field? Ex. I want the title input field to not contain special characters (ex. @#$%) or not be more than certain length.

I am using windows and rails 3.2.8.

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1 Answer

  1. Editorial Team

    A 3 in 1 question 🙂

    1st answer

    As others said you need to modify your table to have the new fields, and this can be easily done with a migration:

    rails generate migration AddAuthorToPost author:string

    But you also need to modify your views, because it won’t contain the new field. The corresponding views are in app/views/posts (look for edit.html.erb and new.html.erb).

    Of course you’ll need to run your migration on your database:

    rake db:migrate

    2nd answer

    You can add your stylesheets to your views in app/views/posts but I recommend you to use layouts for your application, The layouts sit in the app/views/layouts. You can simply create an application.html.erb in your layouts directory and put your CSS includes there.

    <html>
  <head>
    <%= stylesheet_link_tag "custom" %>
  </head>
  <body>
    <%= yield %>
  </body>
</html>

    The yield block will contain the actual output of your views, so you should remove these parts from the existing views.

    3rd answer

    If you want to control the accepted characters for a certain field, you could do it in a validation in your model.

    validates :title,
  :format => { :with => /\A[a-zA-Z]+\z/, :message => "Only letters allowed" },
  :length => { :maximum => 20 }
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