1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
"""ORM event interfaces.
"""
from sqlalchemy import event
class ClassEvents(event.Events):
@classmethod
def accept_with(cls, target):
from sqlalchemy.orm.instrumentation import ClassManager
if isinstance(target, ClassManager):
return [target]
elif isinstance(target, type):
manager = manager_of_class(target)
if manager:
return [manager]
return []
# TODO: change these to accept "target" -
# the target is the state or the instance, depending
# on if the listener was registered with "raw=True" -
# do the same thing for all the other events here (Mapper, Session, Attributes).
# Not sending raw=True means the listen() method of the
# Events subclass will wrap incoming listeners to marshall each
# "target" argument into "instance". The name "target" can be
# used consistently to make it simple.
#
# this way end users don't have to deal with InstanceState and
# the internals can have faster performance.
def on_init(self, state, instance, args, kwargs):
""""""
def on_init_failure(self, state, instance, args, kwargs):
""""""
def on_load(self, instance):
""""""
def on_resurrect(self, state, instance):
""""""
class MapperEvents(event.Events):
""""""
class SessionEvents(event.Events):
""""""
class AttributeEvents(event.Events):
""""""
|
