Modeling Demo Microposts

The core of the micropost data model is even simpler than the one for users: a micropost has only an id and a content field for the micropost’s text (of type string).1 There’s an

additional complication, though: We want to associate each micropost with a particular user; we’ll accomplish this by recording the user_id of the owner of the post. The results are shown in Figure 2.3.

We’ll see in Section 2.3.3 (and more fully in Chapter 10) how this user_id attribute allows us to succinctly express the notion that a user potentially has many associated microposts.