form_for action has .id appended to URL during edit action - Rails 3

Question

I have a form where when I submit during an edit action has the .id appended to the post action when it shouldn't. The form works correctly during create but not update.

Here's the URL post action during edit.

http://localhost:3000/members/1/profile.1

Heres my form

<%= form_for([@member, @profile]) do |f| %>
<%= f.label :first_name %><br />
<%= f.text_field :first_name, {:class => "txt-field-short"} %><br /><br />
<%= f.label :last_name %><br />
<%= f.text_field :last_name, {:class => "txt-field-short"} %><br /><br />
<p><%= submit_tag "Create Profile" %></p>
<% end %>

This is my route for this association.

resources :members do
  resource :profile
  resources :orders
end

Here's my create, edit and update actions in my profiles controller

def create
 @member = current_member
 @profile = @member.build_profile(params[:profile])

 respond_to do |format|
  if @profile.save
    format.html { redirect_to(member_profile_path, :notice => 'Profile was successfully     created.') }
  else
    format.html { render :action => "new" }
  end
end
end

def edit
 @member = current_member
 @profile = @member.profile
end

def update
 @member = current_member
 @profile = @member.profile
 respond_to do |format|
   if @profile.update_attributes(params[:profile])
     format.html { redirect_to(member_profile_path(@profile), :notice => 'Your profile was successfully updated.') }
  else
    format.html { render :action => "edit" }
   end
 end
end

What's adding the profile.id to the post action?

Answer 1

I believe this can sometimes happen with nested singular resources. Try using a different form_for format:

form_for @profile, :url => member_profile_path(@member) do |f|