Rails%203%20In%20Action

First steps
Now, you’ve just run the generator to generate a new ProjectsController class
and all its goodies. This should fix the “uninitialized constant” error message. If you
run rake cucumber:ok again, it declares that the index action is missing:
Given I am on the homepage
The action 'index' could not be found for ProjectsController ...
To define the index action in your controller, you must define a method inside the
ProjectsController class, just as you did when you generated your first application,
shown in the following listing.
Listing 3.10 app/controllers/projects_controller.rb
class ProjectsController < ApplicationController
def index
end
end
If you run rake cucumber:ok again, this time Rails complain of a missing template
projects/index:
Given I am on the homepage
Missing template projects/index, application/index
with {:handlers=>[:erb, :builder],
:formats=>[:html],
:locale=>[:en, :en]}.
Searched in:
* ".../ticketee/app/views"
The error message isn’t the most helpful, but it’s quite detailed. If you know how to
put the pieces together, you can determine that it’s trying to look for a template called
projects/index or application/index, but it’s not finding it. These templates are primarily
kept at app/views, so it’s fair to guess that it’s expecting something like app/
views/projects/index.
The extension of this file is composed of two parts: the format followed by the handler.
In your output, you’ve got a handler of either :erb or :builder and a format of
:html, so it’s fair to assume from this that the file it’s looking for is either
index.html.erb or index.html.builder. Either of these is fine, but we’ll use the first one
for consistency’s sake.
The first part, index, is the name of the action; that’s the easy part. The second
part, html, indicates the format of this template. Actions in Rails can respond to different
formats (using respond_to, which you saw in chapter 1); the default format is
html. The third part, erb, indicates the templating language you’re using, or the handler
for this specific template. Templates in Rails can use different templating languages/handlers,
but the default in Rails is ERB, hence the erb extension.
You could also create a file at app/views/application/index.html.erb to provide the
view for the index action. This would work because the ProjectsController inherits
from the ApplicationController. If you had another controller inherit from
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