On 18 April 2013 10:10, cha <[email protected]> wrote: > Hello how are you
Great, thanks for asking! > I want to explain to me what is **"Model Managers"** in django ??? and What > are the useful ? They are a different way of collecting querysets of objects. Have you read the documentation to this end? https://docs.djangoproject.com/en/1.5/topics/db/managers/ https://docs.djangoproject.com/en/dev/topics/db/managers/ For instance, on my last project I had "students, subjects, courses, grades" I wanted to be able to call some aspects of those quickly without writing out the whole filter every time. So I created some filters like these: Male students in Accounting under 25 years as Student.men_account_25.all() Male students in Accounting over 25 years as Student.men_account_26.all() Female students in Accounting under 25 years as Student.women_account_25.all() Female students in Accounting over 25 years as Student.women_account_25.all() I could have gone very deep: Male students in Accounting over 25 years that passed last semester and are from province X. I then added a .count() to the end of the call, and I had instant enrollment statistics that were always up-to-date. Does that clear it up for you? cheers L. -- The new creativity is pointing, not making. Likewise, in the future, the best writers will be the best information managers. http://www.theawl.com/2013/02/an-interview-with-avant-garde-poet-kenneth-goldsmith -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/django-users?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
