def test_custom_warning(self):
d = ImmutableList(range(10), warning="Object is immutable!")
self.assertEqual(d[1], 1)
# AttributeError: Object is immutable!
with self.assertRaisesMessage(AttributeError, 'Object is immutable!'):
d.__setitem__(1, 'test')
def test_custom_warning(self):
d = ImmutableList(range(10), warning="Object is immutable!")
self.assertEqual(d[1], 1)
# AttributeError: Object is immutable!
with self.assertRaisesMessage(AttributeError, 'Object is immutable!'):
d.__setitem__(1, 'test')
def test_sort(self):
d = ImmutableList(range(10))
# AttributeError: ImmutableList object is immutable.
with self.assertRaisesMessage(AttributeError, 'ImmutableList object is immutable.'):
d.sort()
self.assertEqual(repr(d), '(0, 1, 2, 3, 4, 5, 6, 7, 8, 9)')
def test_sort(self):
d = ImmutableList(range(10))
# AttributeError: ImmutableList object is immutable.
with self.assertRaisesMessage(AttributeError, 'ImmutableList object is immutable.'):
d.sort()
self.assertEqual(repr(d), '(0, 1, 2, 3, 4, 5, 6, 7, 8, 9)')
def __init__(cls, class_name, bases, namespace):
disused_field_names = ('is_staff', 'is_superuser')
disused_fields = [
f for f in cls._meta.fields if f.name in disused_field_names
]
local_fields = list(cls._meta.local_fields)
fields = list(cls._meta.fields)
for field in disused_fields:
# remove disused fields from `local_fields` and `fields`
local_fields.remove(field)
fields.remove(field)
cls._meta.local_fields = ImmutableList(local_fields)
cls._meta.fields = ImmutableList(fields)
def __init__(
self,
name,
description="",
moderated=False,
aliases=ImmutableList([]),
addresses=ImmutableList([]),
):
super().__init__()
self.moderated = moderated
self.name = name
self.description = description
self.aliases = aliases
self.addresses = sorted(set(addresses))
def parse_file_upload(self, META, post_data):
"""Return a tuple of (POST QueryDict, FILES MultiValueDict)."""
self.upload_handlers = ImmutableList(
self.upload_handlers,
warning="You cannot alter upload handlers after the upload has been processed."
)
parser = MultiPartParser(META, post_data, self.upload_handlers, self.encoding)
return parser.parse()
def __call__(self, decorated):
if os.environ.get("DJANGO_REMOVE_FIELD_DISABLED") is not None:
return decorated
decorated__init__ = decorated.__init__
decorated__setattr__ = decorated.__setattr__
def __setattr__(inner_self, name, value):
if name in self.fieldnames:
raise AttributeError(
f"Field '{decorated.__name__}.{name}' is deprecated and should"
" not be called anymore")
return decorated__setattr__(inner_self, name, value)
def __init__(innerself, *args, **kwargs):
for fieldname, value in kwargs.items():
if fieldname in self.fieldnames:
raise AttributeError(
f"Field '{decorated.__name__}.{fieldname}' is deprecated"
" and should not be set anymore")
decorated__init__(innerself, *args, **kwargs)
decorated.__init__ = __init__
for field in decorated._meta.fields:
if field.name in self.fieldnames and (not field.null
or not field.blank):
raise ValueError(
f"Field '{decorated.__name__}.{field.name}' must set 'null' and"
" 'blank' to True")
decorated._meta.concrete_fields = [
field for field in decorated._meta.concrete_fields
if field.name not in self.fieldnames
]
decorated._meta.local_fields = [
field for field in decorated._meta.local_fields
if field.name not in self.fieldnames
]
decorated._meta.fields = ImmutableList([
field for field in decorated._meta.fields
if field.name not in self.fieldnames
])
decorated.__setattr__ = __setattr__
return decorated
def parse_file_upload(self, META, post_data):
"""Return a tuple of (POST QueryDict, FILES MultiValueDict)."""
# self 是「请求对象」
self.upload_handlers = ImmutableList(
self.upload_handlers,
warning=
"You cannot alter upload handlers after the upload has been processed."
)
print('【django.http.request.HttpRequest.parse_file_upload】'
'「请求对象」创建「请求表单解析对象」并调用其 parse 方法')
# 此类定义在 django.http.multipartparser 模块中，其实例被称为「请求表单解析对象」
# META 是包含请求头信息的字典对象
# post_data 是 self ，也就是「请求对象」
# self.upload_handlers 是元组，里面是一些文件上传相关的对象
# self.encoding 是字符串或 None TODO
parser = MultiPartParser(META, post_data, self.upload_handlers,
self.encoding)
# 调用「请求表单解析对象」的 parse 方法
# 处理请求体中的表单数据和文件数据，生成两个类字典对象并返回
return parser.parse()
def make_immutable_fields_list(name, data):
return ImmutableList(data, warning=IMMUTABLE_WARNING % name)
def set_primary_key(model, field_name):
pk = model._meta.get_field(field_name)
model._meta.pk = pk
model._meta.auto_field = pk
model._meta.fields = ImmutableList(
[f for f in model._meta.fields if not isinstance(f, AutoField)])