Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.10/site-packages/django/db/models/signals.py: 68%

1from functools import partial 

2 

3from django.db.models.utils import make_model_tuple 

4from django.dispatch import Signal 

5 

6class_prepared = Signal() 

7 

8 

9class ModelSignal(Signal): 

10 """ 

11 Signal subclass that allows the sender to be lazily specified as a string 

12 of the `app_label.ModelName` form. 

13 """ 

14 

15 def _lazy_method(self, method, apps, receiver, sender, **kwargs): 

16 from django.db.models.options import Options 

17 

18 # This partial takes a single optional argument named "sender". 

19 partial_method = partial(method, receiver, **kwargs) 

20 if isinstance(sender, str): 

21 apps = apps or Options.default_apps 

22 apps.lazy_model_operation(partial_method, make_model_tuple(sender)) 

23 else: 

24 return partial_method(sender) 

25 

26 def connect(self, receiver, sender=None, weak=True, dispatch_uid=None, apps=None): 

27 self._lazy_method( 

28 super().connect, 

29 apps, 

30 receiver, 

31 sender, 

32 weak=weak, 

33 dispatch_uid=dispatch_uid, 

34 ) 

35 

36 def disconnect(self, receiver=None, sender=None, dispatch_uid=None, apps=None): 

37 return self._lazy_method( 

38 super().disconnect, apps, receiver, sender, dispatch_uid=dispatch_uid 

39 ) 

40 

41 

42pre_init = ModelSignal(use_caching=True) 

43post_init = ModelSignal(use_caching=True) 

44 

45pre_save = ModelSignal(use_caching=True) 

46post_save = ModelSignal(use_caching=True) 

47 

48pre_delete = ModelSignal(use_caching=True) 

49post_delete = ModelSignal(use_caching=True) 

50 

51m2m_changed = ModelSignal(use_caching=True) 

52 

53pre_migrate = Signal() 

54post_migrate = Signal()