Here lies an order of save methods and what data can be accessed from every one of them.

In order to find out the order I simply put print() in each of these methods:

#	File	Method	Data	Documentation
1	signals.py	pre_init	own fields ?	Link
2	admin.py	save_model	own fields	Link
3	models.py	save() (before super().save())	own fields	Link
4	signals.py	pre_save	own fields	Link
5	signals.py	post_save	+ id	Link
6	models.py	save() (after super().save())	+ id	Link
7	admin.py	save_related()	+ id	Link