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    <p>on a slightly different tack.</p> <p>The idea of using a class method to do this feels wrong from an OO point of view.</p> <p>You should really refactor this so that it works from an instance method. </p> <pre> def personal_data_module item_module = Hpricot(body) { :studies => (item_module/"studies").inner_html, :birth_place => (item_module/"birth_place").inner_html, :marrital_status => (item_module/"marrital_status").inner_html } end </pre> <p>Then, where you need to use it, instead of doing....</p> <pre> Foobar.get_personal_data_module(the_id) </pre> <p>you would do</p> <pre> Foobar.find_by_person_id(the_id).personal_data_module </pre> <p>This looks worse, but in fact, thats a bit artificial, normally, you would be referencing this from some other object, where in fact you would have a 'handle' on the person object, so would not have to construct it yourself.</p> <p>For instance, if you have another class, where you reference person_id as a foreign key, you would have</p> <p>class Organisation belongs_to :person end</p> <p>then, where you have an organisation, you could go</p> <pre> organisation.person.personal_information_module </pre> <p>Yes, I know, that breaks demeter, so it would be better to wrap it in a delegate</p> <pre> class Organisation belongs_to :person def personal_info_module person.personal_info_module end end </pre> <p>And then from controller code, you could just say</p> <pre> organisation.personal_info_module </pre> <p>without worrying about where it comes from at all.</p> <p>This is because a 'personal_data_module' is really an attribute of that class, not something to be accessed through a class method.</p> <p>But this also brings up some questions, for instance, is person_id the primary key of this table? is this a legacy situation where the primary key of the table is not called 'id'?</p> <p>If this is the case, have you told ActiveRecord about this or do you have to use 'find_by_person_id' all over where you would really want to write 'find'?</p>
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    1. COhttp://stackoverflow.com/questions/158482/inject-data-members-to-an-object - The next related question. As I have said I am new to Ruby and I am experimenting right now. Thanks for the inpu; it is really helpful.
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      1. USSilviu Postavaru
 

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