Rails%203%20In%20Action

Leaving a comment
This generates helpers such as project_tickets_path. But for your form it’s not
important what comment the project is being created for, so you use ticket
_comments_path instead. This means you need to define a separate nonnested
resource for your tickets and then a nested resource under that for your comments, as
shown in the following listing.
Listing 10.5 config/routes.rb
resources :projects do
resources :tickets
end
resources :tickets do
resources :comments
end
The last three lines in listing 10.5 are the lines you need in order for ticket
_comments_path to be defined, which will make your form work.
10.1.4 The comments controller
Now finally you need to generate the CommentsController so that your form has
somewhere to post to. You can do this by running the following command:
rails g controller comments
A create action in this controller will provide the receiving end for the comment
form, so you should add this now. You need to define two before_filters in this controller.
The first is to ensure the user is signed in, because you don’t want anonymous
users creating comments; the other is to find the Ticket object. This entire controller
is shown in the following listing.
Listing 10.6 app/controllers/comments_controller.rb
class CommentsController < ApplicationController
before_filter :authenticate_user!
before_filter :find_ticket
def create
@comment = @ticket.comments.build(params[:comment].merge(:user =>
➥current_user))
if @comment.save
flash[:notice] = "Comment has been created."
redirect_to [@ticket.project, @ticket]
else
flash[:alert] = "Comment has not been created."
render :template => "tickets/show"
end
end
private
def find_ticket
B
C Render template
Redirect to
ticket page
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