The status feed partial defers the feed item rendering to a feed item partial using the code

Here we pass a :collection parameter with thefeed items, which causes render to use the given partial s(’feed_item’ in this cae) to render each item in the collection. (We have omitted the :partial parameter in previous renderings, writing, e.g., render ’shared/micropost’, but with a :collection parameter that syntax doesn’t work.) The feed item partial itself appears in Listing 10.43.

Listing 10.43 also adds a CSS id for each feed item using

as required by the test in Listing 10.40.
   We can then add the feed to the Home page by rendering the feed partial as usual (Listing 10.44). The result is a display of the feed on the Home page, as required (Figure 10.14).