Ah! Yeah, you could be correct. I apologize, I was unfamiliar with mezzanine (never seen it or used it); could be something going on there. I would check their docs to see if they have some logging utilities you could utilize. I would imagine they have to have something... otherwise you'd just be guessing at things...
I didn't see mezzanine until I went back and looked at your previous post - sorry about that. Still, I'm surprised the core django logging isn't catching it... mezzanine must abstract some of that away.
i don't understand this question how can i do that
@hannylicious
I cannot see how it is related to my question at a first glance. My books have different versions but they are separated and have different permissions, in the sense that a visitor can see the latest published version and an editor can see the latest under-review version, so there is no universal latest for all visitors. Right now I am doing something like
Book.objects.filter(... according to visitor) then get the latest allowed versions in Python, and I am wondering if there is a SQL / DRM solution here.
I could compute a bunch of flags such as
latest_under_review, latest_published but keeping track of these flags with the addition and removal of books can be a hassle.
On the SQL side https://stackoverflow.com/questions/6841605/get-top-1-row-of-each-group suggests the use of
cross apply, which does not seem to be supported by django DRM.
@hannylicious sir, in this video it shows .....https://www.youtube.com/watch?v=UXSxBx8eG28
@hannylicious but me donot have this option why?
Because you're installing a different version. That option would probably show up if you were upgrading from 3.6.x to 3.6.x. My understanding is that a 3.8 installation is a completely different, unique install which is separate from a 3.6 installation - so there is not an upgrade option because there is no 3.8 already installed.
@hannylicious right sir
@hannylicious let me try
For uninstalling a program on Windows, google will have the answer pretty easily (control panel -> uninstall -> Python3.6)
@hannylicious let me try
@hannylicious sir, if you see at the bottom at right side there is still 3.6 , but I did installed 3.8, why not it appears here ?
@QbasicFan This is essentially what I am doing now but moving forward there will be more "editors", "groups" with different roles and authors might "share" different versions of the books with different people. So in theory everyone could see different subsets of versions of the same book and have different "latest" version. I could use multiple flags and reduce the chance that people in the same group see different versions of the book, but it is more straightforward to have a general query that says
Book.objects.filter(can be seen by user).filter('keep only the latest').
@BoPeng How do you manage appending different versions... ? Do you overwrite the save() to handle it?
I know what you meant by
good architectural design but in the same time I would like to keep "permission" and "logistics" orthogonal so that the query will always return the correct latest versions no matter how the logistics change.