On Feb 1, 11:17 pm, Robin B <robi...@gmail.com> wrote:
> On Feb 1, 4:37 pm, BearXu <bearx...@gmail.com> wrote:
> > 3)In Django table can be inherited like:
> > class *Place*(models.Model):
> > name = models.CharField(max_length=50)
> > class Restaurant(*Place*):---------------------> Can it be done in DAL?
> > serves_hot_dogs = models.BooleanField()
> > serves_pizza = models.BooleanField()
> web2py has a way to do table inheritance.
For this simple example of extending a base set of fields & adding
extras, yes it can be done as follows:
timestamp=SQLTable(None,'timestamp',
SQLField('created_on','datetime',
readable=False,
writable=False,
default=request.now),
SQLField('modified_on','datetime',
readable=False,
writable=False,
default=request.now,update=request.now))
db.define_table('mytable',timestamp,
SQLField('my_extra_field'))
However this doesn't provide the ability to do a search of all sub-
tables without a JOIN as-per Single-Table Inheritance:
http://groups.google.com/group/web2py/browse_thread/thread/d9715e7b751c1e56/eb4533ebc0d683bf
I have no idea whether the Django version allows that or not...
F
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