mirror of https://github.com/sgoudham/Enso-Bot.git
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
63 lines
2.1 KiB
Python
63 lines
2.1 KiB
Python
5 years ago
|
import functools
|
||
|
|
from importlib import import_module
|
||
|
|
|
||
|
|
from django.core.exceptions import ViewDoesNotExist
|
||
|
|
from django.utils.module_loading import module_has_submodule
|
||
|
|
|
||
|
|
|
||
|
|
@functools.lru_cache(maxsize=None)
|
||
|
|
def get_callable(lookup_view):
|
||
|
|
"""
|
||
|
|
Return a callable corresponding to lookup_view.
|
||
|
|
* If lookup_view is already a callable, return it.
|
||
|
|
* If lookup_view is a string import path that can be resolved to a callable,
|
||
|
|
import that callable and return it, otherwise raise an exception
|
||
|
|
(ImportError or ViewDoesNotExist).
|
||
|
|
"""
|
||
|
|
if callable(lookup_view):
|
||
|
|
return lookup_view
|
||
|
|
|
||
|
|
if not isinstance(lookup_view, str):
|
||
|
|
raise ViewDoesNotExist("'%s' is not a callable or a dot-notation path" % lookup_view)
|
||
|
|
|
||
|
|
mod_name, func_name = get_mod_func(lookup_view)
|
||
|
|
if not func_name: # No '.' in lookup_view
|
||
|
|
raise ImportError("Could not import '%s'. The path must be fully qualified." % lookup_view)
|
||
|
|
|
||
|
|
try:
|
||
|
|
mod = import_module(mod_name)
|
||
|
|
except ImportError:
|
||
|
|
parentmod, submod = get_mod_func(mod_name)
|
||
|
|
if submod and not module_has_submodule(import_module(parentmod), submod):
|
||
|
|
raise ViewDoesNotExist(
|
||
|
|
"Could not import '%s'. Parent module %s does not exist." %
|
||
|
|
(lookup_view, mod_name)
|
||
|
|
)
|
||
|
|
else:
|
||
|
|
raise
|
||
|
|
else:
|
||
|
|
try:
|
||
|
|
view_func = getattr(mod, func_name)
|
||
|
|
except AttributeError:
|
||
|
|
raise ViewDoesNotExist(
|
||
|
|
"Could not import '%s'. View does not exist in module %s." %
|
||
|
|
(lookup_view, mod_name)
|
||
|
|
)
|
||
|
|
else:
|
||
|
|
if not callable(view_func):
|
||
|
|
raise ViewDoesNotExist(
|
||
|
|
"Could not import '%s.%s'. View is not callable." %
|
||
|
|
(mod_name, func_name)
|
||
|
|
)
|
||
|
|
return view_func
|
||
|
|
|
||
|
|
|
||
|
|
def get_mod_func(callback):
|
||
|
|
# Convert 'django.views.news.stories.story_detail' to
|
||
|
|
# ['django.views.news.stories', 'story_detail']
|
||
|
|
try:
|
||
|
|
dot = callback.rindex('.')
|
||
|
|
except ValueError:
|
||
|
|
return callback, ''
|
||
|
|
return callback[:dot], callback[dot + 1:]
|