cant seem to update my values in ruby -

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so have form color palette update live, i've been stuck problem days.

this controller update

def update   @project = project.find_by(id: params[:id])     binding.pry   @palette = @project.palette   unless @project     render json: {error: "project not found"},     status: 404     return   end   @project.update(project_params)   @project.update_palette(palette_params)   render json: project end

one project has 1 palette

    private  def project_params     params.require(:project).permit(:name, :option, :id, :background_dark_color, :background_light_color, :dark_color1, :dark_color2, :light_color1, :light_color2) end  def palette_params         params.require(:palette).permit(:background_dark_color, :background_light_color, :dark_color1, :dark_color2, :light_color1, :light_color2) #=> [ :id, :name, :_destroy ]) end

the error throwing me enter image description here

added form

              <%= palette.label 'background_dark_color' %>:           <%= palette.text_field :background_dark_color, maxlength: 6, placeholder: "#{@project.palette}" %><br/>            <%= palette.label 'background_light_color' %>:           <%= palette.text_field :background_light_color, maxlength: 6, placeholder: "#{@project.palette}" %><br/>            <%= palette.label 'dark_color1' %>:           <%= palette.text_field :dark_color1, maxlength: 6, placeholder: "#{}"  %><br/>            <%= palette.label 'dark_color2' %>:           <%= palette.text_field :dark_color2, maxlength: 6, placeholder: "#{@project.palette}" %><br/>            <%= palette.label 'light_color1' %>:           <%= palette.text_field :light_color1, maxlength: 6, placeholder: "#{@project.palette}"      %><br/>            <%= palette.label 'light_color2' %>:           <%= palette.text_field :light_color2, maxlength: 6, placeholder: "#{@project.palette}" %><br/>            <%= palette.submit %>            <%= link_to 'destroy',  project,  method: :delete %>            <!-- , data: { confirm: 'are sure?' } confirm message , sucks, better use "undo" -->          <% end %>


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