On Monday, March 26, 2018 at 2:39:09 AM UTC-7, [email protected] wrote: > > I am interested in your opinion about identity map. Why do yo think it > causes more problems that it solves? >
The main issue is that an identity map is fundamentally the wrong abstraction: obj1 = Model[1] obj2 = Model[1] obj2.foo = 1 obj1.foo = 2 obj2.save # uses foo = 2 instead of foo = 1 You are modifying code to share an existing object instead of returning a new object. In the above example, it's pretty obvious, but in complex code it may not be, and can be the source of numerous bugs as a result. Think about why you are using an identity map. What problems do you think it solves? Thanks, Jeremy -- You received this message because you are subscribed to the Google Groups "sequel-talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/sequel-talk. For more options, visit https://groups.google.com/d/optout.
