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POhow does one _model_ data from relational databases in clojure?
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copied!<p>I have asked this question on twitter as well the #clojure IRC channel, yet got no responses.</p> <p>There have been several articles about Clojure-for-Ruby-programmers, Clojure-for-lisp-programmers.. but what is the missing part is <strong>Clojure for ActiveRecord programmers</strong> .</p> <p>There have been articles about interacting with MongoDB, Redis, etc. - but these are key value stores at the end of the day. However, coming from a Rails background, we are used to thinking about databases in terms of inheritance - has_many, polymorphic, belongs_to, etc. </p> <p>The few articles about Clojure/Compojure + MySQL (<a href="http://briancarper.net/blog/clojure-and-compojure-to-the-rescue-again" rel="noreferrer">ffclassic</a>) - delve right into sql. Of course, it might be that an ORM induces <em>impedence mismatch</em>, but the fact remains that after thinking like ActiveRecord, it is very difficult to think any other way.</p> <p>I believe that relational DBs, lend themselves very well to the object-oriented paradigm because of them being , essentially, Sets. Stuff like activerecord is very well suited for modelling this data. For e.g. a blog - simply put </p> <pre><code>class Post < ActiveRecord::Base has_many :comments end class Comment < ActiveRecord::Base belongs_to :post end </code></pre> <p>How does one model this in Clojure - which is so strictly anti-OO ? Perhaps the question would have been better if it referred to all functional programming languages, but I am more interested from a Clojure standpoint (and Clojure examples)</p>

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