Hi all,
I am worried about how to model the next scene (this is an example, but
an appropriated one): In the model we have People, and there are
different kind of people, let's say: Professors, Students and Other.
Each People object has a 'type' attribute. Type can be P, S or O.
So far, all right.
Each people has an identifier that looks like: {LETTER}{NUMBER}. P1, P2,
P3 and S1 are examples of valid identifiers.
When you instance a People object you know its type but not its number:
p = People(type="S")
The question is, how can I handle this numbers in my model? The count
should be dependent of the type.
I am thinking about creating PostgreSQL sequences and use them to
retrieve the propitiated number each time a People is instanced:
...
if type == "S":
self.number = seq_wrapper_s.next()
elif typ == "P":
self.number = seq_wrapper_p.next()
else:
self.number = seq_wrapper_o.next()
...
But this will tie me to an specific data base engine. Is there a way of
doing this task in Django in a independent-db-engine way?
Thanks in advance,
Juanjo
--
mi blog: http://www.juanjoconti.com.ar
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