Rails%203%20In%20Action

14 CHAPTER 1 Ruby on Rails, the framework
Great! Here, you’re told that Name can’t be blank and that the value you entered for
Cost isn’t a number. Let’s see what happens if you enter foo for the Name field and
-100 for the Cost field, and click Create Purchase. You should get a different error for
the Cost field now, as shown in figure 1.6.
Good to see! Both of your validations are working now. When you change Cost to
100 and click Create Purchase, it should be considered valid by the validations and
take you to the show action. Let’s look at what this particular action does now.
1.2.8 Showing off
This action displays the content such as shown in figure 1.7.
The number at the end of the URL is the unique numerical ID for this purchase. But
what does it mean? Let’s look at the view for this show action now, as shown in the following
listing.
Listing 1.8 app/views/purchases/show.html.erb
Name:
Cost:
Figure 1.7 A single purchase
Figure 1.6 Cost must
be greater than 0