help with partial

rubyonrails-talk
1

First and foremost sorry if my english is not the best.

In my application I have a view with tickets and i can select it one to one with a button. The selected tickets go to another view that shows me the tickets i have choosen. I want to export this selected tickets to excell.

My code is the next:

2

Showing tickets/exportar.html.erb where line #9 raised:

You have a nil object when you didn't expect it! The error occurred while evaluating nil.items

You don't seem to be setting @cartticket anywhere.

Fred

3

Frederick Cheung wrote:

Showing tickets/exportar.html.erb where line #9 raised:

You have a nil object when you didn't expect it! The error occurred while evaluating nil.items

You don't seem to be setting @cartticket anywhere.

Fred

I dont`t think so, because in ticket controller this code works fine:

def add_to_cartticket    @cartticket = find_cartticket     ticket = Ticket.find(params[:id])     @cartticket.add_ticket(ticket)

  end

  def find_cartticket     unless session[:cartticket] # if there's no cart in the session     session[:cartticket] = Cartticket.new # add a new one     end     session[:cartticket] # return existing or new cart   end

thanks for the answer. Now i'm not implementing this code, only appears in the add_to_cartticket view one table with the fields i want to show. Next step if I can`t sole tehe excel problem will be print it directly.

4

Frederick Cheung wrote:

Showing tickets/exportar.html.erb where line #9 raised:

You have a nil object when you didn't expect it! The error occurred while evaluating nil.items

You don't seem to be setting @cartticket anywhere.

Fred

I dont`t think so, because in ticket controller this code works fine:

def add_to_cartticket   @cartticket = find_cartticket    ticket = Ticket.find(params[:id])    @cartticket.add_ticket(ticket)

end

That's irrelevant. when your expotar action is called you get a new
instance of the Controller - instance variables don't persist across
requests.

Fred

5

Frederick Cheung wrote:

end

That's irrelevant. when your expotar action is called you get a new instance of the Controller - instance variables don't persist across requests.

Fred

So I will find @cartticket before select the items really?

Sorry, I can't parse that sentence.

Fred

6

Sorry. I think this is the solution that you're trying to show me:

def expotar #THIS METTOD SHOULD SELECT ALL THE CURRENT TICKETS IN CARTICKET, i think works wroung

    @cartticket = find_cartticket     @tickets=@cartticket.items

    headers['Contenet-type']="aplication/vnd.ms-excel"   headers['Contenet-Disposition']='attachment; filename="report.xls"'       headers['Cache-Control']='' end

@tickets has the tickets that y need.

I think you were trying to say this

7

Sorry. I think this is the solution that you're trying to show me:

def expotar #THIS METTOD SHOULD SELECT ALL THE CURRENT TICKETS IN CARTICKET, i think works wroung

   @cartticket = find_cartticket    @tickets=@cartticket.items

   headers['Contenet-type']="aplication/vnd.ms-excel" headers['Contenet-Disposition']='attachment; filename="report.xls"'      headers['Cache-Control']='' end

@tickets has the tickets that y need.

I think you were trying to say this

that looks fine to me (ps send_data/send_file might help you reduce
typos in those headers)

Fred

8

thanks a lot!!