goals {
message <<-MARKDOWN
When a user creates a new topic, or edits an existing topic, they are
currently shown a page with just that topic. For our voting app it makes
more sense that they would be taken back to the topic list."
In this step we'll change the flow of our app so that the user is taken back to the topics list after they add a new topic (create) or
edit an existing topic (update).
MARKDOWN
}
steps {
step "Change the topics controller" do
message "Open `app/controllers/topics_controller.rb` and look at the create method. "
message "Find the line:"
source_code :ruby, "format.html { redirect_to @topic, notice: 'Topic was successfully created.' }"
message 'and change `@topic` to `topics_path` like this:'
source_code :ruby, "format.html { redirect_to topics_path, notice: 'Topic was successfully created.' }"
message 'so that the file looks like this:'
source_code :ruby, <<-RUBY
def create
@topic = Topic.new(topic_params)
respond_to do |format|
if @topic.save
format.html { redirect_to topics_path, notice: 'Topic was successfully created.' }
format.json { render action: 'show', status: :created, location: @topic }
else
format.html { render action: 'new' }
format.json { render json: @topic.errors, status: :unprocessable_entity }
end
end
end
RUBY
message "In the same file, locate the update method. "
message "Find the line:"
source_code :ruby, "format.html { redirect_to @topic, notice: 'Topic was successfully updated.' }"
message 'and change `@topic` to `topics_path` like before:'
source_code :ruby, "format.html { redirect_to topics_path, notice: 'Topic was successfully updated.' }"
end
step "Add the flash message to your application view" do
message "Open `app/views/layouts/application.html.erb`."
message "Find the `<body>` HTML tag and immediately after add the following code:"
source_code :ruby, <<-RUBY
<% flash.each do |name, msg| %>
<div><%= msg %></div>
<% end %>
RUBY
end
step "Confirm your changes" do
message "Look at <http://localhost:3000>."
end
}
explanation {
message <<-MARKDOWN
* `format.html { redirect_to topics_path, notice: 'Topic was successfully created.' }`:
* `format.html` means that the server should send html back to the browser
* `redirect_to topics_path` means show the **topics list page** when we're done creating or updating a topic
* `notice: 'Topic was successfully created/updated.'` puts the message into the flash so it will be displayed on the topics list
MARKDOWN
}
next_step "make_the_topic_title_a_link"