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If you aren??™t impressed with what Active Record
provides after this chapter, you??™re just not passionate enough about coding!
There are three main features of Active Record that are at the real core: callbacks, associations,
and validations. Callbacks are hooks into various logic points of the Active Record life
cycle. Associations provide a means to handle SQL and link together your Active Record models,
and validations allow you to do some basic checks and balances on your data via code. Throughout
this chapter, we??™ll take a deeper look at each of these features, and since callbacks directly
relate to the life cycle of Active Record objects, we??™ll start by focusing on them and cover validations
and associations later in this chapter.
Callbacks
When initially trying to learn Ruby and Active Record, we all found the term ???callbacks??? confusing.
The documentation??™s definition of callbacks didn??™t really help much, and we needed to
play around with real code a while before we felt like we really got the concept.


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