ruby on rails - How to create separate action/view that adds Book to Author -

i have implemented testapp model "author" has-many "books" following http://railscasts.com/episodes/196-nested-model-form-revised. using 1 simple relation in example, nothing else.

the app works perfectly, can add , delete books dynamically author using "link_to_add_fields" etc. save, modify, delete works should.

the form looks this:

<%= simple_form_for(@author) |author_form| %> <%= author_form.input :name %><br />   <%= author_form.input :born %><br />   <h1>books author</h1>   <!-- assume @author.books (somehow...) -->   <%= author_form.simple_fields_for :books |book_fields| %>     <%= render partial: "book_fields", locals: {f: book_fields} %>   <% end %>   <%= link_to_add_fields "add book", author_form, :books %>   <%= author_form.submit %> <% end %> 

i have partial "_book_fields.html.erb" used both edit view , js-code.

<fieldset class="book">     <%= f.input :title %><br />     <%= f.input :pages %><br />     <%= f.hidden_field :_destroy %>     <%= link_to "remove", '#', class: "remove_fields" %> </fieldset> 

i have cover field upload picture using paperclip removed brevity.

the problem have want create "add single book author"-action/view. can't wrap head around how partial should used.

lets have author-action looks author-id, , creates empty book (using @author.books.build ?) how show such form in view action possible add book author.books array? can use existing partial?

lets want separate action/view remove book author, how work?

to have expressive , dryed code i:

first, rename partial reused, choose name difficult.

second, let's have 2 actions in authorscontroller: new_one , new_many. names difficult here. then, have app/views/authors/new_one.html.erb , app/views/authors/new_many.html.erb

third, call renamed partial this:

# new_one = render partial: 'renamed_partial', locals: { link_to_add: false }  # new_many = render partial: 'renamed_partial', locals: { link_to_add: true } 

and renamed partial change:

<%= simple_form_for(@author) |author_form| %> <%= author_form.input :name %><br />   <%= author_form.input :born %><br />   <h1>books author</h1>   <!-- assume @author.books (somehow...) -->   <%= author_form.simple_fields_for :books |book_fields| %>     <%= render partial: "book_fields", locals: {f: book_fields} %>   <% end %>    <%#### here change! ####%>   <%= link_to_add_fields "add book", author_form, :books if link_to_add %>     <%= author_form.submit %> <% end %> 

i forgot, right, should use @author.books.build add new book.