Rails%203%20In%20Action

62 CHAPTER 3 Developing a real Rails application
To review the routes you’ve defined, you can run the rake routes command and
get output similar to the following.
Listing 3.12 rake routes output
root /
{:controller=>"projects", :action=>"index"}
projects GET /projects(.:format)
{:action=>"index", :controller=>"projects"
POST /projects(.:format)
{:action=>"create", :controller=>"projects"}
new_project GET /projects/new(.:format)
{:action=>"new", :controller=>"projects"
edit_project GET /projects/:id/edit(.:format)
{:action=>"edit", :controller=>"projects"}
project GET /projects/:id(.:format)
{:action=>"show", :controller=>"projects"}
PUT /projects/:id(.:format)
{:action=>"update", :controller=>"projects"}
DELETE /projects/:id(.:format)
{:action=>"delete", :controller=>"projects"}
The words in the leftmost column of this output are the beginnings of the method
names you can use in your controllers or views to access them. If you want just the
path to a route, such as /projects, then use projects_path. If you want the full URL,
such as http://yoursite.com/projects, use projects_url. It’s best to use these helpers
rather than hardcoding the URLs; doing so makes your application consistent across
the board. For example, to generate the route to a single project, you would use either
project_path or project_url:
project_path(@project)
This method takes one argument and generates the path according to this object.
You’ll see later how you can alter this path to be more user friendly, generating a URL
such as /projects/1-our-project rather than the impersonal /projects/1.
The four paths mentioned earlier match up to the helpers in table 3.2. Running
rake cucumber:ok now produces a complaint about a missing new action:
When I follow "New Project"
The action 'new' could not be found for ProjectsController
In the following listing, you define the new action in your controller by defining a new
method directly underneath the index method.
URL Helper
GET /projects projects_path
/projects/new new_project_path
/projects/:id project_path
/projects/:id/edit edit_project_path
Table 3.2
RESTful routing matchup