Can A turn into B with C?

A_codeblocks_form.html.erb

rails generate model section:references{polymorphic}:index step:references<p>
	<%= form_for step.codeblocks.build, url: tutorial_step_codeblocks_path(tutorial_id, step.id), method: :post do |codeblock| %>

  		<div class="field">
    		<%= codeblock.label :code %>
    		<%= codeblock.text_area :code %>
  		</div>
  		<div class="field">
    		<%= codeblock.label :description %>
    		<%= codeblock.text_area :description %>
  		</div>
  		<%= codeblock.submit "Add CodeBlock", class: "button success" %>
      <%= link_to 'Remove CodeBlock', '#', class: 'codeblock-form-hide' %>
	<% end %>
</p>

B_codeblocks_form.html.erb

<p>
	<%= form_for step.sections.build, url: tutorial_step_codeblocks_path(tutorial_id, step.id), method: :post do |codeblock| %>

  		<div class="field">
    		<%= codeblock.label :code %>
    		<%= codeblock.text_area :code %>
  		</div>
  		<div class="field">
    		<%= codeblock.label :description %>
    		<%= codeblock.text_area :description %>
  		</div>
  		<%= codeblock.submit "Add CodeBlock", class: "button success" %>
      <%= link_to 'Remove CodeBlock', '#', class: 'codeblock-form-hide' %>
	<% end %>
</p>

codeblock.rb

class Codeblock < ActiveRecord::Base
has_many :sections, as: :item
end

generate

rails generate model section:references{polymorphic}:index step:references

section.rb

class Section < ActiveRecord::Base
  belongs_to :step
  belongs_to :item, polymorphic: true
end

step.rb

class Step < ActiveRecord::Base
  has_many :tutorial_step_relationships, dependent: :destroy
  has_many :tutorials, :through => :tutorial_step_relationships
  has_many :codeblocks, dependent: :destroy
  has_many :screenshots, dependent: :destroy
  has_many :sections, dependent: :destroy
end