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@@ -1540,6 +1540,11 @@ This is very similar to the `Article` model that you saw earlier. The difference
is the line `belongs_to :article`, which sets up an Active Record _association_.
You'll learn a little about associations in the next section of this guide.
+The (`:references`) keyword used in the bash command is a special data type for models.
+It creates a new column on your database table with the provided model name appended with an `_id`
+that can hold integer values. You can get a better understanding after analyzing the
+`db/schema.rb` file below.
+
In addition to the model, Rails has also made a migration to create the
corresponding database table: