Reform gem

gistfile1.rb

# Working: 
def create
  @form = SongForm.new(Song.new)
  respond_to do |format|
    if @form.validate(params[:song])
      @form.save do |data, nested|
        Song.create(nested)
      end
      format.html { redirect_to @form, notice: 'Song was successfully created.' }
      format.json { render :show, status: :created, location: @form }
    else
      format.html { render :new }
      format.json { render json: @song.errors, status: :unprocessable_entity }
    end
  end
end

# Not Working: 
def create
  @form = SongForm.new(Song.new)
  respond_to do |format|
    if @form.validate(params[:song])
      @form.save
      format.html { redirect_to @form, notice: 'Song was successfully created.' }
      format.json { render :show, status: :created, location: @form }
    else
      format.html { render :new }
      format.json { render json: @song.errors, status: :unprocessable_entity }
    end
  end
end