Hi, there https://github.com/daxslab/web2py-model-class-declaration is a
plugin that tries to give the weppy syntax for models to web2py, you can
look it and tell me what you think.
Greetings.
El 07/12/15 a las 06:07, Alessio Varalta escribió:
Thanks for the help. I found the solution in this document
https://drive.google.com/file/d/0B1MqW7JZ47SybHNnMFdPWmNQcHc/view?usp=drive_web
where there is a explanation for create a class
On Sunday, 6 December 2015 19:59:20 UTC+1, Anthony wrote:
On Sunday, December 6, 2015 at 9:49:49 AM UTC-5, Alessio Varalta
wrote:
This solution for me is not good. Ok in this case work but
virtual field allows only simple operation on the single filed
of a table.
A virtual/method field can be as complex as you want it to be, and
it does not operate on only a single field of a record. Rather, an
entire record is passed to it. Furthermore, method fields can take
additional arguments and of course have access to any global
objects as well. Perhaps you are confused because the functions of
virtual/method fields are often defined using lambdas, but you
could instead define a separate function using "def" and then
specify that function in the definition of the virtual field.
I want class with function where i can use cicle and where i
can use another dal object..This is present for all frameworks
java-ruiby!!!!!!!!!!!!!!! for exmpale
I don't see how you would /need/ a class for anything you want to
do. You could simply create functions and pass the records to the
functions (the DAL method fields are just a convenient way to
attach such functions as pseudo-methods of the record). If you
want a way to organize a set of related functions, you could still
create a class and just define a set of static methods.
If you want an ORM, you might try the weppy ORM or SQLAlchemy or
another framework altogether, but the web2py DAL is simply not an
ORM and is not going to be. Nevertheless, it is not clear why you
would need an ORM or classes to do what you want to do.
Class Person extend Model
string name,
int age ecc..
function calculateNationOfPerson(id){
Nation nation=new Nation('all')
return nation.find_nation_of_person(id)
}
}
I don't know exactly what the above is attempting to do, as the
data model of nation is not clear (i.e., is "id" the id of the
Person record, and if so, how does the Nation object use that to
find the person's nation?), so I won't attempt any web2py code.
But in principle, I don't see why you couldn't define a similar
function and just pass a web2py Row object to it (and optionally,
attach it as a method via a method field).
Anthony
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