Ruby on Rails

I think I figured it out.
It was to do with my @student.build_account in the students#show method.
(And as per my original post, I think I had that in my form_for tag).

Because I'm returning to the same page, the foreign key was continually
being 'built'.

My students controller looks likes this:
def show
@student = Student.find(params[:id])
@account = @student.account
if @account.nil?
@account = @student.build_account
end

respond_to do |format|
format.html # show.html.erb
format.json { render json: @student }
end
end

And my accounts controller looks like this:
def create
@student = Student.find(params[:student_id])
@account = @student.create_account(params[:account])
redirect_to student_path(@student)
end
end

And my app/views/students/show.html.erb is attached.

Attachments:
http://www.ruby-forum.com/attachment/7216/show.html.erb

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