Chapter 5. Relationships

This chapter shows how to use relationships to gain access to even more data to display. Drupal's core taxonomy field stores the taxonomy ID, which isn't too useful to most site visitors; but add a relationship between the content type that uses the taxonomy and that taxonomy vocabulary, and any fields in that vocabulary become available for display, filtering, or sorting. Lynn can modify her neighborhood view to use neighborhood names instead of taxonomy IDs to filter the property list. Similarly, using the built-in entity reference, any reference field can be used to add all the fields in the referenced content to the available fields list. Entity references make it possible to show information about the realtors' along with property information. And because of relationships, we can make powerful attachment displays, such as showing the open houses associated with a group of property listings.