␡
- 9.1 Scopes
- 9.2 Callbacks
- 9.3 Calculation Methods
- 9.4 Single-Table Inheritance (STI)
- 9.5 Abstract Base Model Classes
- 9.6 Polymorphic has_many Relationships
- 9.7 Enums
- 9.8 Foreign-Key Constraints
- 9.9 Modules for Reusing Common Behavior
- 9.10 Modifying Active Record Classes at Runtime
- 9.11 Using Value Objects
- 9.12 Nonpersisted Models
- 9.13 PostgreSQL Enhancements
- 9.14 Conclusion
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This chapter is from the book
9.14 Conclusion
With this chapter we conclude our coverage of Active Record. Among other things, we examined how callbacks let us factor our code in a clean and object-oriented fashion. We also expanded our modeling options by considering single-table inheritance, abstract classes, and Active Record’s distinctive polymorphic relationships.
At this point in the book, we’ve covered two parts of the MVC pattern: the model and the controller. It’s now time to delve into the third and final part: the view.
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