|
1
|
|
|
from django.db import models |
|
2
|
|
|
|
|
3
|
|
|
from crudbuilder.exceptions import ( |
|
4
|
|
|
NotModelException, |
|
5
|
|
|
AlreadyRegistered, |
|
6
|
|
|
NotRegistered |
|
7
|
|
|
) |
|
8
|
|
|
|
|
9
|
|
|
from crudbuilder import helpers |
|
10
|
|
|
|
|
11
|
|
|
__all__ = ('CrudBuilderRegistry', 'register', 'registry') |
|
12
|
|
|
|
|
13
|
|
|
|
|
14
|
|
|
class CrudBuilderRegistry(dict): |
|
15
|
|
|
"""Dictionary like object representing a collection of objects.""" |
|
16
|
|
|
|
|
17
|
|
|
@classmethod |
|
18
|
|
|
def extract_args(cls, *args): |
|
19
|
|
|
""" |
|
20
|
|
|
Takes any arguments like a model and crud, or just one of |
|
21
|
|
|
those, in any order, and return a model and crud. |
|
22
|
|
|
""" |
|
23
|
|
|
model = None |
|
24
|
|
|
crudbuilder = None |
|
25
|
|
|
|
|
26
|
|
|
for arg in args: |
|
27
|
|
|
if issubclass(arg, models.Model): |
|
28
|
|
|
model = arg |
|
29
|
|
|
else: |
|
30
|
|
|
crudbuilder = arg |
|
31
|
|
|
|
|
32
|
|
|
return [model, crudbuilder] |
|
33
|
|
|
|
|
34
|
|
|
def register(self, *args, **kwargs): |
|
35
|
|
|
""" |
|
36
|
|
|
Register a crud. |
|
37
|
|
|
|
|
38
|
|
|
Two unordered arguments are accepted, at least one should be passed: |
|
39
|
|
|
- a model, |
|
40
|
|
|
- a crudbuilder class |
|
41
|
|
|
""" |
|
42
|
|
|
|
|
43
|
|
|
assert len(args) <= 2, 'register takes at most 2 args' |
|
44
|
|
|
assert len(args) > 0, 'register takes at least 1 arg' |
|
45
|
|
|
|
|
46
|
|
|
model, crudbuilder = self.__class__.extract_args(*args) |
|
47
|
|
|
|
|
48
|
|
|
if not issubclass(model, models.Model): |
|
49
|
|
|
msg = "First argument should be Django Model" |
|
50
|
|
|
raise NotModelException(msg) |
|
51
|
|
|
|
|
52
|
|
|
key = self._model_key(model, crudbuilder) |
|
53
|
|
|
|
|
54
|
|
|
if key in self: |
|
55
|
|
|
msg = "Key '{key}' has already been registered.".format( |
|
56
|
|
|
key=key |
|
57
|
|
|
) |
|
58
|
|
|
raise AlreadyRegistered(msg) |
|
59
|
|
|
|
|
60
|
|
|
self.__setitem__(key, crudbuilder) |
|
61
|
|
|
return crudbuilder |
|
62
|
|
|
|
|
63
|
|
|
def _model_key(self, model, crudbuilder): |
|
64
|
|
|
app_label = model._meta.app_label |
|
65
|
|
|
model_name = model.__name__.lower() |
|
66
|
|
|
postfix_url = helpers.custom_postfix_url(crudbuilder(), model_name) |
|
67
|
|
|
return '{}-{}-{}'.format(app_label, model_name, postfix_url) |
|
68
|
|
|
|
|
69
|
|
|
def unregister(self, model): |
|
70
|
|
|
key = self._model_key(model) |
|
71
|
|
|
if key in self: |
|
72
|
|
|
self.__delitem__(key) |
|
73
|
|
|
|
|
74
|
|
|
def __getitem__(self, name): |
|
75
|
|
|
""" |
|
76
|
|
|
Return the CrudBuilder class registered for this name. If none is |
|
77
|
|
|
registered, raise NotRegistered. |
|
78
|
|
|
""" |
|
79
|
|
|
try: |
|
80
|
|
|
return super(CrudBuilderRegistry, self).__getitem__(name) |
|
81
|
|
|
except KeyError: |
|
82
|
|
|
raise NotRegistered(name, self) |
|
83
|
|
|
|
|
84
|
|
|
|
|
85
|
|
|
registry = CrudBuilderRegistry() |
|
86
|
|
|
|
|
87
|
|
|
|
|
88
|
|
|
def register(*args, **kwargs): |
|
89
|
|
|
""" |
|
90
|
|
|
Proxy method :py:meth:`CrudBuilderRegistry.register` of the |
|
91
|
|
|
:py:data:`registry` module level instance. |
|
92
|
|
|
""" |
|
93
|
|
|
return registry.register(*args, **kwargs) |
|
94
|
|
|
|
asifpy /
django-crudbuilder
