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Why I hate active record
for building business applications
It is good option for building shallow webapps server side MVC.
But not so good for business logic heavy restful
web services
Model class tightly coupled with the database
Makes it really difficult to decouple business
logic from framework.
Not very extensible - example no pluggable id
generation
No support for composite keys
No auto-dirty checking / transaction write
behind
Limited support for persistence by reachability
All this makes it difficult to apply DDD or even
basic OO (SRP)
Alternatives - datamapper looked promising
or look beyond ruby :-)
Those are my observation based on 5 months
of working with AR and comparing it with the 8
years of working with hibernate.

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