django/contrib/admindocs/views.py
import inspect
from importlib import import_module
from inspect import cleandoc
from pathlib import Path
from django.apps import apps
from django.contrib import admin
from django.contrib.admin.views.decorators import staff_member_required
from django.contrib.admindocs import utils
from django.contrib.admindocs.utils import (
remove_non_capturing_groups,
replace_metacharacters,
replace_named_groups,
replace_unnamed_groups,
)
from django.core.exceptions import ImproperlyConfigured, ViewDoesNotExist
from django.db import models
from django.http import Http404
from django.template.engine import Engine
from django.urls import get_mod_func, get_resolver, get_urlconf
from django.utils._os import safe_join
from django.utils.decorators import method_decorator
from django.utils.functional import cached_property
from django.utils.inspect import (
func_accepts_kwargs,
func_accepts_var_args,
get_func_full_args,
method_has_no_args,
)
from django.utils.translation import gettext as _
from django.views.generic import TemplateView
from .utils import get_view_name
# Exclude methods starting with these strings from documentation
MODEL_METHODS_EXCLUDE = ("_", "add_", "delete", "save", "set_")
class BaseAdminDocsView(TemplateView):
"""
Base view for admindocs views.
"""
@method_decorator(staff_member_required)
def dispatch(self, request, *args, **kwargs):
if not utils.docutils_is_available:
# Display an error message for people without docutils
self.template_name = "admin_doc/missing_docutils.html"
return self.render_to_response(admin.site.each_context(request))
return super().dispatch(request, *args, **kwargs)
def get_context_data(self, **kwargs):
return super().get_context_data(
**{
**kwargs,
**admin.site.each_context(self.request),
}
)
class BookmarkletsView(BaseAdminDocsView):
template_name = "admin_doc/bookmarklets.html"
class TemplateTagIndexView(BaseAdminDocsView):
template_name = "admin_doc/template_tag_index.html"
def get_context_data(self, **kwargs):
tags = []
try:
engine = Engine.get_default()
except ImproperlyConfigured:
# Non-trivial TEMPLATES settings aren't supported (#24125).
pass
else:
app_libs = sorted(engine.template_libraries.items())
builtin_libs = [("", lib) for lib in engine.template_builtins]
for module_name, library in builtin_libs + app_libs:
for tag_name, tag_func in library.tags.items():
title, body, metadata = utils.parse_docstring(tag_func.__doc__)
title = title and utils.parse_rst(
title, "tag", _("tag:") + tag_name
)
body = body and utils.parse_rst(body, "tag", _("tag:") + tag_name)
for key in metadata:
metadata[key] = utils.parse_rst(
metadata[key], "tag", _("tag:") + tag_name
)
tag_library = module_name.split(".")[-1]
tags.append(
{
"name": tag_name,
"title": title,
"body": body,
"meta": metadata,
"library": tag_library,
}
)
return super().get_context_data(**{**kwargs, "tags": tags})
class TemplateFilterIndexView(BaseAdminDocsView):
template_name = "admin_doc/template_filter_index.html"
def get_context_data(self, **kwargs):
filters = []
try:
engine = Engine.get_default()
except ImproperlyConfigured:
# Non-trivial TEMPLATES settings aren't supported (#24125).
pass
else:
app_libs = sorted(engine.template_libraries.items())
builtin_libs = [("", lib) for lib in engine.template_builtins]
for module_name, library in builtin_libs + app_libs:
for filter_name, filter_func in library.filters.items():
title, body, metadata = utils.parse_docstring(filter_func.__doc__)
title = title and utils.parse_rst(
title, "filter", _("filter:") + filter_name
)
body = body and utils.parse_rst(
body, "filter", _("filter:") + filter_name
)
for key in metadata:
metadata[key] = utils.parse_rst(
metadata[key], "filter", _("filter:") + filter_name
)
tag_library = module_name.split(".")[-1]
filters.append(
{
"name": filter_name,
"title": title,
"body": body,
"meta": metadata,
"library": tag_library,
}
)
return super().get_context_data(**{**kwargs, "filters": filters})
class ViewIndexView(BaseAdminDocsView):
template_name = "admin_doc/view_index.html"
def get_context_data(self, **kwargs):
views = []
url_resolver = get_resolver(get_urlconf())
try:
view_functions = extract_views_from_urlpatterns(url_resolver.url_patterns)
except ImproperlyConfigured:
view_functions = []
for func, regex, namespace, name in view_functions:
views.append(
{
"full_name": get_view_name(func),
"url": simplify_regex(regex),
"url_name": ":".join((namespace or []) + (name and [name] or [])),
"namespace": ":".join(namespace or []),
"name": name,
}
)
return super().get_context_data(**{**kwargs, "views": views})
class ViewDetailView(BaseAdminDocsView):
template_name = "admin_doc/view_detail.html"
@staticmethod
def _get_view_func(view):
urlconf = get_urlconf()
if get_resolver(urlconf)._is_callback(view):
mod, func = get_mod_func(view)
try:
# Separate the module and function, e.g.
# 'mymodule.views.myview' -> 'mymodule.views', 'myview').
return getattr(import_module(mod), func)
except ImportError:
# Import may fail because view contains a class name, e.g.
# 'mymodule.views.ViewContainer.my_view', so mod takes the form
# 'mymodule.views.ViewContainer'. Parse it again to separate
# the module and class.
mod, klass = get_mod_func(mod)
return getattr(getattr(import_module(mod), klass), func)
def get_context_data(self, **kwargs):
view = self.kwargs["view"]
view_func = self._get_view_func(view)
if view_func is None:
raise Http404
title, body, metadata = utils.parse_docstring(view_func.__doc__)
title = title and utils.parse_rst(title, "view", _("view:") + view)
body = body and utils.parse_rst(body, "view", _("view:") + view)
for key in metadata:
metadata[key] = utils.parse_rst(metadata[key], "model", _("view:") + view)
return super().get_context_data(
**{
**kwargs,
"name": view,
"summary": title,
"body": body,
"meta": metadata,
}
)
class ModelIndexView(BaseAdminDocsView):
template_name = "admin_doc/model_index.html"
def get_context_data(self, **kwargs):
m_list = [m._meta for m in apps.get_models()]
return super().get_context_data(**{**kwargs, "models": m_list})
class ModelDetailView(BaseAdminDocsView):
template_name = "admin_doc/model_detail.html"
def get_context_data(self, **kwargs):
model_name = self.kwargs["model_name"]
# Get the model class.
try:
app_config = apps.get_app_config(self.kwargs["app_label"])
except LookupError:
raise Http404(_("App %(app_label)r not found") % self.kwargs)
try:
model = app_config.get_model(model_name)
except LookupError:
raise Http404(
_("Model %(model_name)r not found in app %(app_label)r") % self.kwargs
)
opts = model._meta
title, body, metadata = utils.parse_docstring(model.__doc__)
title = title and utils.parse_rst(title, "model", _("model:") + model_name)
body = body and utils.parse_rst(body, "model", _("model:") + model_name)
# Gather fields/field descriptions.
fields = []
for field in opts.fields:
# ForeignKey is a special case since the field will actually be a
# descriptor that returns the other object
if isinstance(field, models.ForeignKey):
data_type = field.remote_field.model.__name__
app_label = field.remote_field.model._meta.app_label
verbose = utils.parse_rst(
(
_("the related `%(app_label)s.%(data_type)s` object")
% {
"app_label": app_label,
"data_type": data_type,
}
),
"model",
_("model:") + data_type,
)
else:
data_type = get_readable_field_data_type(field)
verbose = field.verbose_name
fields.append(
{
"name": field.name,
"data_type": data_type,
"verbose": verbose or "",
"help_text": field.help_text,
}
)
# Gather many-to-many fields.
for field in opts.many_to_many:
data_type = field.remote_field.model.__name__
app_label = field.remote_field.model._meta.app_label
verbose = _("related `%(app_label)s.%(object_name)s` objects") % {
"app_label": app_label,
"object_name": data_type,
}
fields.append(
{
"name": "%s.all" % field.name,
"data_type": "List",
"verbose": utils.parse_rst(
_("all %s") % verbose, "model", _("model:") + opts.model_name
),
}
)
fields.append(
{
"name": "%s.count" % field.name,
"data_type": "Integer",
"verbose": utils.parse_rst(
_("number of %s") % verbose,
"model",
_("model:") + opts.model_name,
),
}
)
methods = []
# Gather model methods.
for func_name, func in model.__dict__.items():
if inspect.isfunction(func) or isinstance(
func, (cached_property, property)
):
try:
for exclude in MODEL_METHODS_EXCLUDE:
if func_name.startswith(exclude):
raise StopIteration
except StopIteration:
continue
verbose = func.__doc__
verbose = verbose and (
utils.parse_rst(
cleandoc(verbose), "model", _("model:") + opts.model_name
)
)
# Show properties, cached_properties, and methods without
# arguments as fields. Otherwise, show as a 'method with
# arguments'.
if isinstance(func, (cached_property, property)):
fields.append(
{
"name": func_name,
"data_type": get_return_data_type(func_name),
"verbose": verbose or "",
}
)
elif (
method_has_no_args(func)
and not func_accepts_kwargs(func)
and not func_accepts_var_args(func)
):
fields.append(
{
"name": func_name,
"data_type": get_return_data_type(func_name),
"verbose": verbose or "",
}
)
else:
arguments = get_func_full_args(func)
# Join arguments with ', ' and in case of default value,
# join it with '='. Use repr() so that strings will be
# correctly displayed.
print_arguments = ", ".join(
[
"=".join([arg_el[0], *map(repr, arg_el[1:])])
for arg_el in arguments
]
)
methods.append(
{
"name": func_name,
"arguments": print_arguments,
"verbose": verbose or "",
}
)
# Gather related objects
for rel in opts.related_objects:
verbose = _("related `%(app_label)s.%(object_name)s` objects") % {
"app_label": rel.related_model._meta.app_label,
"object_name": rel.related_model._meta.object_name,
}
accessor = rel.accessor_name
fields.append(
{
"name": "%s.all" % accessor,
"data_type": "List",
"verbose": utils.parse_rst(
_("all %s") % verbose, "model", _("model:") + opts.model_name
),
}
)
fields.append(
{
"name": "%s.count" % accessor,
"data_type": "Integer",
"verbose": utils.parse_rst(
_("number of %s") % verbose,
"model",
_("model:") + opts.model_name,
),
}
)
return super().get_context_data(
**{
**kwargs,
"name": opts.label,
"summary": title,
"description": body,
"fields": fields,
"methods": methods,
}
)
class TemplateDetailView(BaseAdminDocsView):
template_name = "admin_doc/template_detail.html"
def get_context_data(self, **kwargs):
template = self.kwargs["template"]
templates = []
try:
default_engine = Engine.get_default()
except ImproperlyConfigured:
# Non-trivial TEMPLATES settings aren't supported (#24125).
pass
else:
directories = list(default_engine.dirs)
for loader in default_engine.template_loaders:
if hasattr(loader, "get_dirs"):
for dir_ in loader.get_dirs():
if dir_ not in directories:
directories.append(dir_)
for index, directory in enumerate(directories):
template_file = Path(safe_join(directory, template))
if template_file.exists():
template_contents = template_file.read_text()
else:
template_contents = ""
templates.append(
{
"file": template_file,
"exists": template_file.exists(),
"contents": template_contents,
"order": index,
}
)
return super().get_context_data(
**{
**kwargs,
"name": template,
"templates": templates,
}
)
####################
# Helper functions #
####################
def get_return_data_type(func_name):
"""Return a somewhat-helpful data type given a function name"""
if func_name.startswith("get_"):
if func_name.endswith("_list"):
return "List"
elif func_name.endswith("_count"):
return "Integer"
return ""
def get_readable_field_data_type(field):
"""
Return the description for a given field type, if it exists. Fields'
descriptions can contain format strings, which will be interpolated with
the values of field.__dict__ before being output.
"""
return field.description % field.__dict__
def extract_views_from_urlpatterns(urlpatterns, base="", namespace=None):
"""
Return a list of views from a list of urlpatterns.
Each object in the returned list is a 4-tuple:
(view_func, regex, namespace, name)
"""
views = []
for p in urlpatterns:
if hasattr(p, "url_patterns"):
try:
patterns = p.url_patterns
except ImportError:
continue
views.extend(
extract_views_from_urlpatterns(
patterns,
base + str(p.pattern),
(namespace or []) + (p.namespace and [p.namespace] or []),
)
)
elif hasattr(p, "callback"):
try:
views.append((p.callback, base + str(p.pattern), namespace, p.name))
except ViewDoesNotExist:
continue
else:
raise TypeError(_("%s does not appear to be a urlpattern object") % p)
return views
def simplify_regex(pattern):
r"""
Clean up urlpattern regexes into something more readable by humans. For
example, turn "^(?P<sport_slug>\w+)/athletes/(?P<athlete_slug>\w+)/$"
into "/<sport_slug>/athletes/<athlete_slug>/".
"""
pattern = remove_non_capturing_groups(pattern)
pattern = replace_named_groups(pattern)
pattern = replace_unnamed_groups(pattern)
pattern = replace_metacharacters(pattern)
if not pattern.startswith("/"):
pattern = "/" + pattern
return pattern