Rails: Up and Running, 2nd Edition

Moving Forward

In the next chapter, we’ll look at managing relationships between Active Record classes. We’ll see most types of Active Record relationships in action, including:

• belongs_to

• has_one

• has_many

• has_and_belongs_to_many

• acts_as_list

• acts_as_tree

We’ll build each of these into our evolving Photo Share object model, including the base relationships has_one, has_many, and has_and_belongs_to_many, as well as the plug-ins acts_as_list and acts_as_tree. By the end of the next chapter, we’ll have a fully functioning, database-backed object model.