I'm just getting introduced to rails. I've started with the tutorials
mentioned in tutorialspoint.com. I am getting stuck at creating a
view. Tried the code on this page

http://www.tutorialspoint.com/ruby-on-rails-2.1/rails-views.htm

and it gives me the following error:

undefined method `title' for #<Book id: nil, created_at: nil,
updated_at: nil>

Here is the extracted source:

1: <h1>Add new book</h1>
2: <% form_tag :action => 'create'  do %>
3: <p><label for="book_title">Title</label>:
4: <%= text_field 'book', 'title' %></p>
5: <p><label for="book_price">Price</label>:
6: <%= text_field 'book', 'price' %></p>
7: <p><label for="book_subject">Subject</label>:

Why is this happening?

--deostorll
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