Rails - Polymorphic Association to Create Different Profiles

Attempting to make it so that when a user is created, based on whether they select to be a student or a corporate, rails will create that user either a student profile or a corporate profile.

Ive tried to set it up using Polymorphic associations however cant figure out how to generate the profile at the model layer based on what is selected in the view.

Models

class User < ActiveRecord::Base
 #Polymorphic Association to StudentProfile and CorporateProfile
 belongs_to :profileable, :polymorphic => true

after_create :build_profile

#how do i pass which profile to build?

  def build_profile
    Corporateprofile.create(user: self) # Associations must be defined correctly for this syntax, avoids using ID's directly.
  end

 def build_profile
    Studentprofile.create(user: self) # Associations must be defined correctly for this syntax, avoids using ID's directly.
 end
end

Student and Corporate Profiles

 class Studentprofile < ActiveRecord::Base
     has_one :user, :as => :profileable, dependent: :destroy
    end

class Corporateprofile < ActiveRecord::Base 
 has_one :user, :as => :profileable, dependent: :destroy
end

View

Here i have two radio buttons to decide which user type on the sign up form

<%= bootstrap_form_for(@user) do |f| %>

            <div class="field">
              <%= f.form_group :gender, label: { text: "Gender" }, help: "Are you a corporate or a student?" do %>
              <p></p>
                  <%= f.radio_button :profileable, 1, label: "Student",   inline: true %>
                  <%= f.radio_button :profileable, 2, label: "Corporate", inline: true %>
                <% end %>
          </div>

And there is no passing code on the controller (as im stuck on that). Any better suggestion or ways to fix this would be much appreciated!

Cheers