'acts_as_commentable_with_threading' not saving comments
Here is my form:

    <%=form_for [current_user, @tattoo, @comment], :remote => false, :html =>{:multipart => true} do |f|%>
      <ol>
        <li>
          <%=f.hidden_field :commentable_id, :value=> @tattoo.id %><br
          <%=f.label :body%>
          <%=f.text_area :body, :style=>"width:320;height:80px"%>
        </li>
        <li class="submit">
         <%=f.submit "Add comment"%>
        </li>
      </ol>
    
    <%end%>

and my comments_controller

     def create
      @tattoo = Tattoo.find(params[:comment][:commentable_id])
      @user = @tattoo.user_id
      @user_who_commented = current_user
      @comment = Comment.build_from(@tattoo, @user_who_commented.id, "Comment!" )
      redirect_to(user_tattoo_path(@user, @tattoo))
     end

And my routes:

    resources :users do
         resources :tattoos
          resources :comments
    end

The form works, I can submit and console shows:

      Parameters: {"utf8"=>"✓", "authenticity_token"=>"t6/o2soSU9fAKW/3Sro2kSbyc5WBrs/F0xMIKbwAKaU=", "comment"=>{"commentable_id"=>"4", "body"=>"sdfsdf"}, "commit"=>"Add comment", "user_id"=>"1", "tattoo_id"=>"4"

But nothing is committed, what am I doing wrong?
'acts_as_commentable_with_threading' not saving comments
===

Here is my form:

    <%=form_for [current_user, @tattoo, @comment], :remote => false, :html =>{:multipart => true} do |f|%>
      <ol>
        <li>
          <%=f.hidden_field :commentable_id, :value=> @tattoo.id %><br
          <%=f.label :body%>
          <%=f.text_area :body, :style=>"width:320;height:80px"%>
        </li>
        <li class="submit">
         <%=f.submit "Add comment"%>
        </li>
      </ol>
    
    <%end%>

and my comments_controller

     def create
      @tattoo = Tattoo.find(params[:comment][:commentable_id])
      @user = @tattoo.user_id
      @user_who_commented = current_user
      @comment = Comment.build_from(@tattoo, @user_who_commented.id, "Comment!" )
      redirect_to(user_tattoo_path(@user, @tattoo))
     end

And my routes:

    resources :users do
         resources :tattoos
          resources :comments
    end

The form works, I can submit and console shows:

      Parameters: {"utf8"=>"✓", "authenticity_token"=>"t6/o2soSU9fAKW/3Sro2kSbyc5WBrs/F0xMIKbwAKaU=", "comment"=>{"commentable_id"=>"4", "body"=>"sdfsdf"}, "commit"=>"Add comment", "user_id"=>"1", "tattoo_id"=>"4"

But nothing is committed, what am I doing wrong?