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Re: avoiding excessive number of methods in CGI::Application and DBI modules

by dragonchild (Archbishop)
on May 02, 2005 at 12:46 UTC ( #453196=note: print w/ replies, xml ) Need Help??


in reply to avoiding excessive number of methods in CGI::Application and DBI modules

Is there a(n easy) way to avoid this scenario ?

Yes - don't design your application in a way that sucks.

You're thinking as a DBA / programmer, not as a systems analyst. Think about how your application is going to be used. CGI::Application (and similar frameworks) provide user-level mapping to business-level concepts. I had an application that would CRUD over 40 tables. But, because there were only 7 different screens (with options), I had 7 runmodes. Now, based on those options, different things would happen.

Here's another way to look at it - to run reports, I need 2 runmodes - PickReport() and RunReport(). However, I will probably want:

  • A class for each report
  • One or more base classes for those reports
  • A class for each parameter
  • One or more base classes for those parameters
  • One or more templates for each report (We had 3 - HTML, PDF, and XLS)
  • Internationalization support
  • Database layering
  • Images for look'n'feel

In total, I think we ended up with some 250 files supporting 70 reports. Still only 2 runmodes, though ...


The Perfect is the Enemy of the Good.


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