Hi,
Please ask questions about developing with Django on the django-users group.
This group is for discussions about the development of Django itself.
(as a general rule: decorating single methods should work fine; trying to use
decorators on model classes will probably be painful. These classes use
special metaclasses which make them behave differently in many respects).
Thanks,
Shai.
On Tuesday 26 May 2015 20:44:26 malhar wrote:
> So, there is a huge Django app with multiple classes in Model. I am
> interested in getting call stacks of some classes. I have few questions in
> the approach and few questions regarding the implementation. I am using
> Django 1.4.20 and python 2.7
>
> 1. What if we decide to write a decorator for the class/ methods?
> Ex.
> @trackitdown
> Class A(models.Model):
>
> or
> @trackitdown
> def some_method(): # method in models.py
>
> This is because I do not want to disturb the existing code. I wish to
> achieve following-
> I. If it is a class, track all "calls" whenever QuerySetAPI methods, save,
> delete is called.
> II. while doing following-
> objects =classWhichIsAManager()# overriding default manager Custom manager
>
> this should be decorator's task.
> III. override using get_query_set() , and save(), delete()
>
> How do you see this approach? I obviously was not able to implement this
> because of peculiar behavior of Model and ModelBase.
>
> 2. Is it okay to decorate a class, define decorator as a class and override
> methods in it? How much is this encouraged?
>
> 3. If I use Mixins, and try to implement the same, I still do not get how
> do we override
> objects=classWhichIsAManager()
>
> outside the model class? that too without loosing attributes of original
> model class.
>
> 4. Having said this, I wish to implement a library which will take care
> calls stacks of model classes/ methods.
>
> Is there a fundamental flaw in my approach? I can see that I am trying to
> play with some unknown business of ModelBase(Foreign Key constraints, etc)
> New approaches and comments are equally welcome!
