def __init__(self, site):
# logger.info("20140227 Kernel.__init__() a")
# from importlib import import_module
# # For every plugin, Lino checks whether the package contains a
# # module named `ui` and, if yes, imports this module. The
# # benefit of this is that all "Lino extensions" to the models
# # can be moved out of :xfile:`models.py` into a separate file
# # :xfile:`ui.py`.
# # print '\n'.join([p.app_name for p in self.installed_plugins])
# for p in site.installed_plugins:
# # fn = dirname(inspect.getfile(p.app_module))
# # fn = join(fn, 'ui.py')
# try:
# x = p.app_name + '.ui'
# import_module(x)
# logger.info("20150416 imported %s", x)
# except Exception as e:
# # except ImportError as e:
# if str(e) != "No module named ui":
# logger.warning("Failed to import %s : %s", x, e)
# # raise Exception("Failed to import %s : %s" % (x, e))
self.pending_threads = {}
self.site = site
self.GFK_LIST = []
self.kernel_startup(site)
self.code_mtime = codetime()
# We set `code_mtime` only after kernel_startup() because
# codetime watches only those modules which are already
# imported.
self.memo_parser = Parser()
def url2html(parser, s):
url_text = s.split(None, 1)
if len(url_text) == 1:
url = text = url_text[0]
else:
url, text = url_text
return '<a href="%s">%s</a>' % (url, text)
self.memo_parser.register_command('url', url2html)
if site.build_js_cache_on_startup is None:
site.build_js_cache_on_startup = not (
settings.DEBUG or is_devserver())
# web.site_setup(site)
for a in actors.actors_list:
if a.get_welcome_messages is not None:
# site._welcome_actors.append(a)
site.add_welcome_handler(a.get_welcome_messages)
pre_ui_build.send(self)
self.html_renderer = HtmlRenderer(self)
self.text_renderer = TextRenderer(self)
self.reserved_names = [getattr(constants, n)
for n in constants.URL_PARAMS]
names = set()
for n in self.reserved_names:
if n in names:
raise Exception("Duplicate reserved name %r" % n)
names.add(n)
for p in site.installed_plugins:
p.on_ui_init(self)
ui = None
if self.site.default_ui is not None:
ui = self.site.plugins.resolve(self.site.default_ui)
if ui is None:
raise Exception(
"Invalid value %r for `default_ui` (must be one of %s)"
% (self.site.default_ui, list(self.site.plugins.keys())))
ui.url_prefix = None
else:
for p in self.site.installed_plugins:
if p.ui_handle_attr_name is not None:
ui = p
break
# if ui is None:
# raise Exception("No user interface in {0}".format(
# [u.app_name for u in self.site.installed_plugins]))
if ui is not None:
self.default_renderer = ui.renderer
self.default_ui = ui
post_ui_build.send(self)
if self.default_ui is not None:
# trigger creation of params_layout.params_store
for res in actors.actors_list:
for ba in res.get_actions():
if ba.action.params_layout is not None:
ba.action.params_layout.get_layout_handle(
self.default_ui)
from lino.api import dd
from lino.core import constants
from lino.core import auth
from lino.core.requests import BaseRequest
from lino.core.tablerequest import TableRequest
from lino.core.views import action_request
from lino.core.utils import navinfo
from lino.utils.xmlgen.html import E
from lino.utils.xmlgen import html as xghtml
PLAIN_PAGE_LENGTH = 15
MENUS = dict()
from lino.utils.memo import Parser
MEMO_PARSER = Parser()
def url2html(s):
url, text = s.split(None, 1)
if not text:
text = url
return '<a href="%s">%s</a>' % (url, text)
MEMO_PARSER.register_command('url', url2html)
def http_response(ar, tplname, context):
"Deserves a docstring"
u = ar.get_user()
lang = get_language()
class Kernel(object):
"""This is the class of the object stored in :attr:`Site.kernel
<lino.core.site.Site.kernel>`.
"""
default_ui = None
# _singleton_instance = None
# @classmethod
# def instance(cls, site):
# if cls._singleton_instance is None:
# cls._singleton_instance = cls(site)
# elif cls._singleton_instance.site is not site:
# site.logger().info("Overriding SITE instance")
# cls._singleton_instance.site = site
# return cls._singleton_instance
def __init__(self, site):
# logger.info("20140227 Kernel.__init__() a")
# from importlib import import_module
# # For every plugin, Lino checks whether the package contains a
# # module named `ui` and, if yes, imports this module. The
# # benefit of this is that all "Lino extensions" to the models
# # can be moved out of :xfile:`models.py` into a separate file
# # :xfile:`ui.py`.
# # print '\n'.join([p.app_name for p in self.installed_plugins])
# for p in site.installed_plugins:
# # fn = dirname(inspect.getfile(p.app_module))
# # fn = join(fn, 'ui.py')
# try:
# x = p.app_name + '.ui'
# import_module(x)
# logger.info("20150416 imported %s", x)
# except Exception as e:
# # except ImportError as e:
# if str(e) != "No module named ui":
# logger.warning("Failed to import %s : %s", x, e)
# # raise Exception("Failed to import %s : %s" % (x, e))
self.pending_threads = {}
self.site = site
self.GFK_LIST = []
self.kernel_startup(site)
self.code_mtime = codetime()
# We set `code_mtime` only after kernel_startup() because
# codetime watches only those modules which are already
# imported.
self.memo_parser = Parser()
def url2html(parser, s):
url_text = s.split(None, 1)
if len(url_text) == 1:
url = text = url_text[0]
else:
url, text = url_text
return '<a href="%s">%s</a>' % (url, text)
self.memo_parser.register_command('url', url2html)
if site.build_js_cache_on_startup is None:
site.build_js_cache_on_startup = not (
settings.DEBUG or is_devserver())
# web.site_setup(site)
for a in actors.actors_list:
if a.get_welcome_messages is not None:
# site._welcome_actors.append(a)
site.add_welcome_handler(a.get_welcome_messages)
pre_ui_build.send(self)
self.html_renderer = HtmlRenderer(self)
self.text_renderer = TextRenderer(self)
self.reserved_names = [getattr(constants, n)
for n in constants.URL_PARAMS]
names = set()
for n in self.reserved_names:
if n in names:
raise Exception("Duplicate reserved name %r" % n)
names.add(n)
for p in site.installed_plugins:
p.on_ui_init(self)
ui = None
if self.site.default_ui is not None:
ui = self.site.plugins.resolve(self.site.default_ui)
if ui is None:
raise Exception(
"Invalid value %r for `default_ui` (must be one of %s)"
% (self.site.default_ui, list(self.site.plugins.keys())))
ui.url_prefix = None
else:
for p in self.site.installed_plugins:
if p.ui_handle_attr_name is not None:
ui = p
break
# if ui is None:
# raise Exception("No user interface in {0}".format(
# [u.app_name for u in self.site.installed_plugins]))
if ui is not None:
self.default_renderer = ui.renderer
self.default_ui = ui
post_ui_build.send(self)
if self.default_ui is not None:
# trigger creation of params_layout.params_store
for res in actors.actors_list:
for ba in res.get_actions():
if ba.action.params_layout is not None:
ba.action.params_layout.get_layout_handle(
self.default_ui)
# logger.info("20140227 Kernel.__init__() done")
def kernel_startup(kernel, self):
"""This is a part of a Lino site startup. The Django Model
definitions are done, now Lino analyzes them and does certain
actions:
- Verify that there are no more pending injects Install a
:class:`DisableDeleteHandler
<lino.core.ddh.DisableDeleteHandler>` for each Model into
`_lino_ddh`.
- Install :class:`lino.core.model.Model` attributes and
methods into Models that don't inherit from it.
"""
if len(sys.argv) == 0:
process_name = 'WSGI'
else:
process_name = ' '.join(sys.argv)
logger.info("Started %s (using %s) --> PID %s",
process_name, settings.SETTINGS_MODULE, os.getpid())
# puts(self.welcome_text())
def goodbye():
logger.info("Done %s (PID %s)", process_name, os.getpid())
atexit.register(goodbye)
models_list = get_models(include_auto_created=True)
# this also triggers django.db.models.loading.cache._populate()
self.setup_model_spec(self, 'user_model')
self.setup_model_spec(self, 'project_model')
for app_name_model, p in list(self.override_modlib_models.items()):
# app_name_model is the full installed app module name +
# the model name. It certainly contains at least one dot.
m = '.'.join(app_name_model.split('.')[-2:])
resolve_model(
m,
strict="%s plugin tries to extend unresolved model '%%s'" %
p.__class__.__module__)
for model in models_list:
#~ print 20130216, model
#~ fix_field_cache(model)
# if hasattr(model, '_lino_ddh'):
if '_lino_ddh' in model.__dict__:
raise Exception("20150831 %s", model)
model._lino_ddh = DisableDeleteHandler(model)
Model.django2lino(model)
if isinstance(model.hidden_columns, basestring):
model.hidden_columns = frozenset(
fields.fields_list(model, model.hidden_columns))
if isinstance(model.active_fields, basestring):
model.active_fields = frozenset(
fields.fields_list(model, model.active_fields))
if isinstance(model.allow_cascaded_delete, basestring):
model.allow_cascaded_delete = frozenset(
fields.fields_list(model, model.allow_cascaded_delete))
qsf = model.quick_search_fields
# Attention when inheriting this from from parent model.
# qsf = model.__dict__.get('quick_search_fields', None)
if qsf is None:
fields_list = []
for field in model._meta.fields:
if isinstance(field, models.CharField):
fields_list.append(field.name)
model.quick_search_fields = frozenset(fields_list)
elif isinstance(qsf, frozenset):
pass
elif isinstance(qsf, basestring):
model.quick_search_fields = frozenset(
fields.fields_list(model, model.quick_search_fields))
else:
raise ChangedAPI(
"{0}.quick_search_fields must be None or a string "
"of space-separated field names (not {1})".format(
model, qsf))
if model._meta.abstract:
raise Exception("Tiens?")
# self.modules.define(model._meta.app_label, model.__name__, model)
for f in model._meta.virtual_fields:
if isinstance(f, GenericForeignKey):
kernel.GFK_LIST.append(f)
# vip_classes = (layouts.BaseLayout, fields.Dummy)
# for a in models.get_apps():
# app_label = a.__name__.split('.')[-2]
# for k, v in a.__dict__.items():
# if isinstance(v, type) and issubclass(v, vip_classes):
# self.modules.define(app_label, k, v)
# if k.startswith('setup_'):
# self.modules.define(app_label, k, v)
if self.user_profiles_module:
from importlib import import_module
import_module(self.user_profiles_module)
self.setup_choicelists()
self.setup_workflows()
for model in models_list:
if model._meta.auto_created:
continue # automatic intermediate models created by
# ManyToManyField should not disable delete
# for f, m in model._meta.get_fields_with_model():
for f in model._meta.get_fields():
m = f.model
# Refuse nullable CharFields, but don't trigger on
# NullableCharField (which is a subclass of CharField).
if f.__class__ is models.CharField and f.null:
msg = "Nullable CharField %s in %s" % (f.name, model)
raise Exception(msg)
elif isinstance(f, models.ForeignKey):
if isinstance(f.rel.model, basestring):
raise Exception("Could not resolve target %r of "
"ForeignKey '%s' in %s "
"(models are %s)" %
(f.rel.model, f.name, model, models_list))
set_default_verbose_name(f)
"""
If JobProvider is an MTI child of Company,
then mti.delete_child(JobProvider) must not fail on a
JobProvider being referred only by objects that can refer
to a Company as well.
"""
if not hasattr(f.rel.model, '_lino_ddh'):
raise Exception("20150824")
# f.rel.model._lino_ddh.add_fk(f.model, f)
# m = f.model._meta.concrete_model
# f.rel.model._lino_ddh.add_fk(m, f)
f.rel.model._lino_ddh.add_fk(m or model, f)
kernel.protect_foreignkeys(models_list)
for p in self.installed_plugins:
if isinstance(p, Plugin):
p.before_analyze()
# logger.info("20150429 Gonna send pre_analyze signal")
pre_analyze.send(self, models_list=models_list)
# logger.info("20150429 pre_analyze signal done")
# MergeActions are defined in pre_analyze.
# And MergeAction needs the info in _lino_ddh to correctly find
# keep_volatiles
self.setup_actions()
for model in models_list:
"""Virtual fields declared on the model must have been attached
before calling Model.site_setup(), e.g. because
pcsw.Person.site_setup() declares `is_client` as imported
field.
"""
model.on_analyze(self)
for k, v in class_dict_items(model):
if isinstance(v, fields.VirtualField):
v.attach_to_model(model, k)
#~ logger.info("20130817 attached model vfs")
actors.discover()
logger.debug("actors.initialize()")
for a in actors.actors_list:
a.class_init()
dbtables.discover()
#~ choosers.discover()
actions.discover_choosers()
for a in actors.actors_list:
a.on_analyze(self)
post_analyze.send(self, models_list=models_list)
if False:
logger.info("Languages: %s. %d apps, %d models, %s actors.",
', '.join([li.django_code for li in self.languages]),
len(self.modules),
len(models_list),
len(actors.actors_list))
#~ logger.info(settings.INSTALLED_APPS)
self.setup_layouts()
self.on_each_app('site_setup') # deprecated
# Actor.after_site_setup() is called after the apps'
# site_setup(). Example: pcsw.site_setup() adds a detail to
# properties.Properties, the base class for
# properties.PropsByGroup. The latter would not install a
# `detail_action` during her after_site_setup() and also would
# never get it later.
for a in actors.actors_list:
a.after_site_setup(self)
#~ self.on_site_startup()
self.resolve_virtual_fields()
#~ logger.info("20130827 startup_site done")
def protect_foreignkeys(self, models_list):
"""Change `on_delete` from CASCADE (Django's default value) to PROTECT
for foreignkeys that need to be protected.
Basically we protect all FK fields that are not listed in
their model's :attr:`allow_cascaded_delete
<lino.core.model.Model.allow_cascaded_delete>`. With one
exception: pointers to the MTI parent of a :class:`Polymorphic
<lino.mixins.polymorphic.Polymorphic>` must not
become protected (because Lino handles it automatically, see
:meth:`lino.mixins.polymorphic.Polymorphic.disable_delete`).
"""
from lino.mixins.polymorphic import Polymorphic
def must_protect(m, fk, model):
# Whether the given foreign key fk
if fk.name in m.allow_cascaded_delete:
return False
if m is model: # FK to self
return True
# if issubclass(m, model) or issubclass(model, m):
if issubclass(m, model):
if issubclass(m, Polymorphic):
# they have an MTI relation
return False
return True
for model in models_list:
for m, fk in model._lino_ddh.fklist:
assert fk.rel.model is model
if fk.rel.on_delete == models.CASCADE:
if must_protect(m, fk, model):
msg = (
"Setting {0}.{1}.on_delete to PROTECT because "
"field is not specified in "
"allow_cascaded_delete.").format(fmn(m), fk.name)
logger.debug(msg)
fk.rel.on_delete = models.PROTECT
else:
if fk.name in m.allow_cascaded_delete:
msg = ("{0}.{1} specified in allow_cascaded_delete "
"but on_delete is not CASCADE").format(
fmn(m), fk.name)
raise Exception(msg)
if fk.rel.on_delete == models.SET_NULL:
if not fk.null:
msg = ("{0}.{1} has on_delete SET_NULL but "
"is not nullable ")
msg = msg.format(fmn(m), fk.name, fk.rel.model)
raise Exception(msg)
else:
msg = ("{0}.{1} has custom on_delete").format(
fmn(m), fk.name, fk.rel.on_delete)
logger.debug(msg)
def get_generic_related(self, obj):
"""Yield a series of `(gfk, fk_field, queryset)` tuples which together
will return all database objects for which the given
GenericForeignKey gfk points to the object `obj`. See also
:doc:`/dev/gfks`.
"""
if len(self.GFK_LIST) == 0:
return # e.g. if contenttypes is not installed
from django.contrib.contenttypes.models import ContentType
if not isinstance(obj._meta.pk, GFK_TARGETS):
# raise Exception("20150330 %s", obj._meta.pk)
return # e.g. Country.iso_code is a CharField, cannot
# point to a country using GFK
obj_ct = ContentType.objects.get_for_model(obj.__class__)
# logger.info("20150330 ok %s", obj_ct)
for gfk in self.GFK_LIST:
fk_field = gfk.model._meta.get_field(gfk.fk_field)
# fk_field, remote_model, direct, m2m = \
# gfk.model._meta.get_field_by_name(gfk.fk_field)
kw = dict()
kw[gfk.fk_field] = obj.pk
kw[gfk.ct_field] = obj_ct
ct = ContentType.objects.get_for_model(gfk.model)
yield gfk, fk_field, ct.get_all_objects_for_this_type(**kw)
def get_broken_generic_related(self, model):
"""Yield all database objects of this model which have some broken
GFK field.
This is a slow query which does an additional database request
for each row. (Is there a possibility to do this in a single
SQL query?)
Each yeld object has two special attributes:
- `_message` : a textual description of the problem
- `_todo` : 'delete', 'clear' or 'manual'
Note: the "clear" action should not run automatically, at
least not for :mod:`lino.modlib.changes`.
See also :ref:`lino.tutorial.watch`.
"""
gfks = [f for f in self.GFK_LIST if f.model is model]
if len(gfks):
for gfk in gfks:
fk_field = gfk.model._meta.get_field(gfk.fk_field)
# fk_field, remote_model, direct, m2m = \
# gfk.model._meta.get_field_by_name(gfk.fk_field)
kw = {gfk.ct_field+'__isnull': False}
qs = model.objects.filter(**kw)
for obj in qs:
fk = getattr(obj, gfk.fk_field)
ct = getattr(obj, gfk.ct_field)
pointed_model = ct.model_class()
# pointed_model = ContentType.objects.get_for_id(ct)
try:
pointed_model.objects.get(pk=fk)
except pointed_model.DoesNotExist:
msg = "Invalid primary key {1} for {2} in `{0}`"
obj._message = msg.format(
gfk.fk_field, fk, fmn(pointed_model))
if gfk.name in model.allow_cascaded_delete:
obj._todo = 'delete'
elif fk_field.null:
obj._todo = 'clear'
else:
obj._todo = 'manual'
yield obj
def abandon_response(self):
return self.success(_("User abandoned"))
def field2elem(self, lui, field, **kw):
pass
def run_callback(self, request, thread_id, button_id):
"""Continue the action which was started in a previous request and
which asked for user interaction via a :class:`Callback`.
This is called from `lino.core.views.Callbacks`.
"""
# logger.info("20131212 get_callback %s %s", thread_id, button_id)
# 20140304 Also set a renderer so that callbacks can use it
# (feature needed by beid.FindByBeIdAction).
thread_id = int(thread_id)
cb = self.pending_threads.pop(thread_id, None)
if cb is None:
ar = ActorRequest(request, renderer=self.default_renderer)
logger.debug("No callback %r in %r" % (
thread_id, list(self.pending_threads.keys())))
ar.error("Unknown callback %r" % thread_id)
return self.render_action_response(ar)
# e.g. SubmitInsertClient must set `data_record` in the
# callback request ("ar2"), not the original request ("ar"),
# i.e. the methods to create an instance and to fill
# `data_record` must run on the callback request. So the
# callback request must be a clone of the original request.
# New since 20140421
ar = cb.ar.actor.request_from(cb.ar)
for k in CLONEABLE_ATTRS:
setattr(ar, k, getattr(cb.ar, k))
for c in cb.choices:
if c.name == button_id:
a = ar.bound_action.action
if self.site.log_each_action_request and not a.readonly:
logger.info("run_callback {0} {1} {2}".format(
thread_id, cb.message, c.name))
c.func(ar)
return self.render_action_response(ar)
ar.error("Invalid button %r for callback" % (button_id, thread_id))
return self.render_action_response(ar)
def add_callback(self, ar, *msgs):
"""Returns an "action callback" which will initiate a dialog thread
by asking a question to the user and suspending execution until
the user's answer arrives in a next HTTP request.
Calling this from an Action's :meth:`run_from_ui
<lino.core.actions.Action.run_from_ui>` method will interrupt
the execution, send the specified message back to the user,
adding the executables `yes` and optionally `no` to a queue of
pending "dialog threads".
The client will display the prompt and will continue this
thread by requesting
:class:`lino.modlib.extjs3.views.Callbacks`.
"""
if len(msgs) > 1:
msg = '\n'.join([force_text(s) for s in msgs])
else:
msg = msgs[0]
return Callback(ar, msg)
def set_callback(self, ar, cb):
"""
"""
h = hash(cb)
self.pending_threads[h] = cb
# logger.info("20131212 Stored %r in %r" % (
# h, self.pending_threads))
buttons = dict()
for c in cb.choices:
buttons[c.name] = c.label
ar.success(
cb.message, xcallback=dict(
id=h,
title=cb.title,
buttons=buttons))
def run_action(self, ar):
"""Run the action, catching some exceptions in order to report them
in a user-friendly way.
"""
a = ar.bound_action.action
if self.site.log_each_action_request and not a.readonly:
flds = []
A = flds.append
a = ar.bound_action.action
# A(a.__class__.__module__+'.'+a.__class__.__name__)
A(ar.get_user().username)
A(ar.bound_action.full_name())
A(obj2str(ar.master_instance))
A(obj2str(ar.selected_rows))
# A(format_request(ar.request))
logger.info("run_action {0}".format(' '.join(flds)))
# logger.info("run_action {0}".format(ar))
try:
a.run_from_ui(ar)
if a.parameters and not a.no_params_window:
ar.set_response(close_window=True)
except exceptions.ValidationError as e:
# logger.info("20150127 run_action %r", e)
ar.error(ar.ah.actor.error2str(e), alert=True)
except Warning as e:
ar.error(str(e), alert=True)
return self.render_action_response(ar)
def setup_handle(self, h, ar):
"""
ar is usually None, except for actors with dynamic handle
"""
#~ logger.info('20121010 ExtUI.setup_handle() %s',h.actor)
if h.actor.is_abstract():
return
if isinstance(h, tables.TableHandle):
he = set(h.actor.hidden_columns | h.actor.hidden_elements)
ll = layouts.ColumnsLayout(
h.actor.get_column_names(ar),
h.actor, hidden_elements=he)
h.list_layout = ll.get_layout_handle(self.default_ui)
else:
h.list_layout = None
if h.actor.params_layout:
h.params_layout_handle = h.actor.make_params_layout_handle(self)
h.store = Store(h)
def render_action_response(self, ar):
"""Builds a JSON response from response information stored in given
ActionRequest.
"""
return views.json_response(ar.response, ar.content_type)
def row_action_button(self, *args, **kw):
"""
See :meth:`ExtRenderer.row_action_button`
"""
return self.default_renderer.row_action_button(*args, **kw)
_must_build = False
def must_build_site_cache(self):
self._must_build = True
def make_cache_file(self, fn, write, force=False):
"""Make the specified cache file. This is used internally at server
startup.
"""
# cachedir = self.site.cache_dir.child('static', 'cache', 'js')
# if not exists(settings.STATIC_ROOT):
# logger.info("STATIC_ROOT does not exist: %s", settings.STATIC_ROOT)
# return 0
fn = join(settings.MEDIA_ROOT, fn)
# fn = join(settings.STATIC_ROOT, fn)
# fn = join(self.site.cache_dir, fn)
if not force and not self._must_build and exists(fn):
mtime = os.stat(fn).st_mtime
if mtime > self.code_mtime:
logger.debug("%s (%s) is up to date.", fn, time.ctime(mtime))
return 0
logger.info("Building %s ...", fn)
self.site.makedirs_if_missing(dirname(fn))
f = codecs.open(fn, 'w', encoding='utf-8')
try:
write(f)
f.close()
return 1
except Exception:
f.close()
if not self.site.keep_erroneous_cache_files: #
os.remove(fn)
raise
