On Jun 7, 3:29 am, Ritvvij <ritvi...@gmail.com> wrote:
> Hello guys,
>
> Need help!! Finding it hard to model the 'model' :P within the given
> rails associations.
>
> In java terms, my requirements are...
>
> There are 3 entities - module, chapter and activity.
>
> Chapter entity is a specilization of Module entity (inheritence)
> Activity entity is a specialization of Module entity (inheritence)
> And the tables would have looked like:
> 1. Module table = Module_Id, Entity_type, ....
> 2. Chapter = Chapter_id, .....
> 3. Activity = Activity_id, ......
>
> Hence, if I create a chapter then the tables would be populated as:
> Module table = Module_Id, Entity_type, .... = values ( 100,
> chapter , .... )
> Chapter table = chapter_id, ..... = values ( 100, .... )
> Basically, the ids of chapter and module would be same and module
> table would store the type.
>
That wouldn't be the rails way of doing it. In rails you'd probably
either use single table inheritance or a polymorphic association.
Fred
> Now, if I create a activity then the tables would be populated as:
> Module table = Module_Id, Entity_type, .... = values ( 101,
> activity , .... )
> Activity table = activity_id, ..... = values ( 100, .... )
> Basically, the ids of activity and module would be same and module
> table would store the type.
>
> Can you please guide me how I can model it similarly in rails 2.3.2?
>
> Thanks in advance
> Ritvvij Parrilkh
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