Rails%203%20In%20Action

Creating tickets
inspects any array passed to helpers, such as redirect_to and link_to, and determines
what you mean from the values. For this particular case, Rails determine that
you want this helper:
project_ticket_path(@project, @ticket)
Rails determines this helper because, at this stage, @project and @ticket are both
objects that exist in the database, and you can therefore route to them. The route generated
would be /projects/1/tickets/2 or something similar. Back in the form_for,
@ticket was new, so the route happened to be /projects/1/tickets.
You could have been explicit and specifically used project_ticket_path in the
action, but using an array is DRYer.
When you run bin/cucumber features/creating_tickets.feature, both scenarios
report the same error:
And I press "Create Ticket"
The action 'show' could not be found TicketsController
Therefore, you must create a show action for the TicketsController, but when you
do so, you’ll need to find tickets only for the given project.
5.1.5 Finding tickets scoped by project
Currently, the first scenario is correct, but the second one is not.
Of course, now you must define the show action for your controller, but you can
anticipate that you’ll need to find a ticket for the edit, update, and destroy actions
too and pre-empt those errors. You can also make this a before_filter, just as you
did in the ProjectsController with the find_project method. You define this
finder underneath the find_project method in the TicketsController:
def find_ticket
@ticket = @project.tickets.find(params[:id])
end
find is yet another association method provided by Rails when you declared that your
Project model has_many :tickets. This code attempts to find tickets only within the
scope of the project. Put the before_filter at the top of your class, just underneath
the one to find the project:
before_filter :find_project
before_filter :find_ticket, :only => [:show,
:edit,
:update,
:destroy]
The sequence here is important because you want to find the @project before you go
looking for tickets for it. With this before_filter in place, create an empty show
action in your controller to show that it responds to this action:
def show
end
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