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re2o/preferences/models.py
Laouen Fernet 038a11fb75 Mark strings for translation in preferences
2019-11-24 23:27:55 +01:00

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# -*- mode: python; coding: utf-8 -*-
# Re2o un logiciel d'administration développé initiallement au rezometz. Il
# se veut agnostique au réseau considéré, de manière à être installable en
# quelques clics.
#
# Copyright © 2017 Gabriel Détraz
# Copyright © 2017 Lara Kermarec
# Copyright © 2017 Augustin Lemesle
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
"""
Reglages généraux, machines, utilisateurs, mail, general pour l'application.
"""
from __future__ import unicode_literals
import os
from django.utils.functional import cached_property
from django.utils import timezone
from django.db import models
from django.db.models.signals import post_save
from django.dispatch import receiver
from django.core.cache import cache
from django.forms import ValidationError
from django.utils.translation import ugettext_lazy as _
import machines.models
from re2o.mixins import AclMixin, RevMixin
from re2o.aes_field import AESEncryptedField
from datetime import timedelta
class PreferencesModel(models.Model):
""" Base object for the Preferences objects
Defines methods to handle the cache of the settings (they should
not change a lot) """
@classmethod
def set_in_cache(cls):
""" Save the preferences in a server-side cache """
instance, _created = cls.objects.get_or_create()
cache.set(cls().__class__.__name__.lower(), instance, None)
return instance
@classmethod
def get_cached_value(cls, key):
""" Get the preferences from the server-side cache """
instance = cache.get(cls().__class__.__name__.lower())
if instance is None:
instance = cls.set_in_cache()
return getattr(instance, key)
class Meta:
abstract = True
class OptionalUser(AclMixin, PreferencesModel):
"""Options pour l'user : obligation ou nom du telephone,
activation ou non du solde, autorisation du negatif, fingerprint etc"""
is_tel_mandatory = models.BooleanField(default=True)
gpg_fingerprint = models.BooleanField(default=True)
all_can_create_club = models.BooleanField(
default=False, help_text=_("Users can create a club.")
)
all_can_create_adherent = models.BooleanField(
default=False, help_text=_("Users can create a member.")
)
shell_default = models.OneToOneField(
"users.ListShell", on_delete=models.PROTECT, blank=True, null=True
)
self_change_shell = models.BooleanField(
default=False, help_text=_("Users can edit their shell.")
)
self_change_room = models.BooleanField(
default=False, help_text=_("Users can edit their room.")
)
local_email_accounts_enabled = models.BooleanField(
default=False, help_text=_("Enable local email accounts for users.")
)
local_email_domain = models.CharField(
max_length=32,
default="@example.org",
help_text=_("Domain to use for local email accounts."),
)
max_email_address = models.IntegerField(
default=15,
help_text=_("Maximum number of local email addresses for a standard user."),
)
delete_notyetactive = models.IntegerField(
default=15,
help_text=_(
"Not yet active users will be deleted after this number of days."
),
)
self_adhesion = models.BooleanField(
default=False, help_text=_("A new user can create their account on Re2o.")
)
all_users_active = models.BooleanField(
default=False,
help_text=_(
"If True, all new created and connected users are active."
" If False, only when a valid registration has been paid."
),
)
allow_archived_connexion = models.BooleanField(
default=False, help_text=_("If True, archived users are allowed to connect.")
)
class Meta:
permissions = (("view_optionaluser", _("Can view the user preferences")),)
verbose_name = _("user preferences")
def clean(self):
"""Clean model:
Check the mail_extension
"""
if self.local_email_domain[0] != "@":
raise ValidationError(_("Email domain must begin with @."))
@receiver(post_save, sender=OptionalUser)
def optionaluser_post_save(**kwargs):
"""Ecriture dans le cache"""
user_pref = kwargs["instance"]
user_pref.set_in_cache()
class OptionalMachine(AclMixin, PreferencesModel):
"""Options pour les machines : maximum de machines ou d'alias par user
sans droit, activation de l'ipv6"""
SLAAC = "SLAAC"
DHCPV6 = "DHCPV6"
DISABLED = "DISABLED"
CHOICE_IPV6 = (
(SLAAC, _("Automatic configuration by RA")),
(DHCPV6, _("IP addresses assignment by DHCPv6")),
(DISABLED, _("Disabled")),
)
password_machine = models.BooleanField(default=False)
max_lambdauser_interfaces = models.IntegerField(default=10)
max_lambdauser_aliases = models.IntegerField(default=10)
ipv6_mode = models.CharField(max_length=32, choices=CHOICE_IPV6, default="DISABLED")
create_machine = models.BooleanField(default=True)
default_dns_ttl = models.PositiveIntegerField(
verbose_name=_("default Time To Live (TTL) for CNAME, A and AAAA records"),
default=172800, # 2 days
)
@cached_property
def ipv6(self):
""" Check if the IPv6 option is activated """
return not self.get_cached_value("ipv6_mode") == "DISABLED"
class Meta:
permissions = (("view_optionalmachine", _("Can view the machine preferences")),)
verbose_name = _("machine preferences")
@receiver(post_save, sender=OptionalMachine)
def optionalmachine_post_save(**kwargs):
"""Synchronisation ipv6 et ecriture dans le cache"""
machine_pref = kwargs["instance"]
machine_pref.set_in_cache()
if machine_pref.ipv6_mode != "DISABLED":
for interface in machines.models.Interface.objects.all():
interface.sync_ipv6()
class OptionalTopologie(AclMixin, PreferencesModel):
"""Reglages pour la topologie : mode d'accès radius, vlan où placer
les machines en accept ou reject"""
MACHINE = "MACHINE"
DEFINED = "DEFINED"
CHOICE_RADIUS = (
(MACHINE, _("On the IP range's VLAN of the machine")),
(DEFINED, _("Preset in \"VLAN for machines accepted by RADIUS\"")),
)
CHOICE_PROVISION = (("sftp", "SFTP"), ("tftp", "TFTP"))
switchs_web_management = models.BooleanField(
default=False,
help_text=_("Web management, activated in case of automatic provision."),
)
switchs_web_management_ssl = models.BooleanField(
default=False,
help_text=_(
"SSL web management, make sure that a certificate is"
" installed on the switch."
),
)
switchs_rest_management = models.BooleanField(
default=False,
help_text=_("REST management, activated in case of automatic provision."),
)
switchs_ip_type = models.OneToOneField(
"machines.IpType",
on_delete=models.PROTECT,
blank=True,
null=True,
help_text=_("IP range for the management of switches."),
)
switchs_provision = models.CharField(
max_length=32,
choices=CHOICE_PROVISION,
default="tftp",
help_text=_("Provision of configuration mode for switches."),
)
sftp_login = models.CharField(
max_length=32, null=True, blank=True, help_text=_("SFTP login for switches.")
)
sftp_pass = AESEncryptedField(
max_length=63, null=True, blank=True, help_text=_("SFTP password.")
)
@cached_property
def provisioned_switchs(self):
"""Liste des switches provisionnés"""
from topologie.models import Switch
return Switch.objects.filter(automatic_provision=True).order_by(
"interface__domain__name"
)
@cached_property
def switchs_management_interface(self):
"""Return the ip of the interface that the switch have to contact to get it's config"""
if self.switchs_ip_type:
from machines.models import Role, Interface
return (
Interface.objects.filter(
machine__interface__in=Role.interface_for_roletype(
"switch-conf-server"
)
)
.filter(machine_type__ip_type=self.switchs_ip_type)
.first()
)
else:
return None
@cached_property
def switchs_management_interface_ip(self):
"""Same, but return the ipv4"""
if not self.switchs_management_interface:
return None
return self.switchs_management_interface.ipv4
@cached_property
def switchs_management_sftp_creds(self):
"""Credentials des switchs pour provion sftp"""
if self.sftp_login and self.sftp_pass:
return {"login": self.sftp_login, "pass": self.sftp_pass}
else:
return None
@cached_property
def switchs_management_utils(self):
"""Used for switch_conf, return a list of ip on vlans"""
from machines.models import Role, Ipv6List, Interface
def return_ips_dict(interfaces):
return {
"ipv4": [str(interface.ipv4) for interface in interfaces],
"ipv6": Ipv6List.objects.filter(interface__in=interfaces).values_list(
"ipv6", flat=True
),
}
ntp_servers = Role.all_interfaces_for_roletype("ntp-server").filter(
machine_type__ip_type=self.switchs_ip_type
)
log_servers = Role.all_interfaces_for_roletype("log-server").filter(
machine_type__ip_type=self.switchs_ip_type
)
radius_servers = Role.all_interfaces_for_roletype("radius-server").filter(
machine_type__ip_type=self.switchs_ip_type
)
dhcp_servers = Role.all_interfaces_for_roletype("dhcp-server")
dns_recursive_servers = Role.all_interfaces_for_roletype(
"dns-recursive-server"
).filter(machine_type__ip_type=self.switchs_ip_type)
subnet = None
subnet6 = None
if self.switchs_ip_type:
subnet = (
self.switchs_ip_type.ip_net_full_info
or self.switchs_ip_type.ip_set_full_info[0]
)
subnet6 = self.switchs_ip_type.ip6_set_full_info
return {
"ntp_servers": return_ips_dict(ntp_servers),
"log_servers": return_ips_dict(log_servers),
"radius_servers": return_ips_dict(radius_servers),
"dhcp_servers": return_ips_dict(dhcp_servers),
"dns_recursive_servers": return_ips_dict(dns_recursive_servers),
"subnet": subnet,
"subnet6": subnet6,
}
@cached_property
def provision_switchs_enabled(self):
"""Return true if all settings are ok : switchs on automatic provision,
ip_type"""
return bool(
self.provisioned_switchs
and self.switchs_ip_type
and SwitchManagementCred.objects.filter(default_switch=True).exists()
and self.switchs_management_interface_ip
and bool(
self.switchs_provision != "sftp" or self.switchs_management_sftp_creds
)
)
class Meta:
permissions = (("view_optionaltopologie", _("Can view the topology preferences")),)
verbose_name = _("topology preferences")
@receiver(post_save, sender=OptionalTopologie)
def optionaltopologie_post_save(**kwargs):
"""Ecriture dans le cache"""
topologie_pref = kwargs["instance"]
topologie_pref.set_in_cache()
class RadiusKey(AclMixin, models.Model):
"""Class of a radius key"""
radius_key = AESEncryptedField(max_length=255, help_text=_("RADIUS key."))
comment = models.CharField(
max_length=255, null=True, blank=True, help_text=_("Comment for this key.")
)
default_switch = models.BooleanField(
default=False, help_text=_("Default key for switches.")
)
class Meta:
permissions = (("view_radiuskey", _("Can view a RADIUS key object")),)
verbose_name = _("RADIUS key")
verbose_name_plural = _("RADIUS keys")
def clean(self):
"""Clean model:
Check default switch is unique
"""
if RadiusKey.objects.filter(default_switch=True).count() > 1:
raise ValidationError(_("Default RADIUS key for switches already exists."))
def __str__(self):
return _("RADIUS key ") + str(self.id) + " " + str(self.comment)
class SwitchManagementCred(AclMixin, models.Model):
"""Class of a management creds of a switch, for rest management"""
management_id = models.CharField(max_length=63, help_text=_("Switch login."))
management_pass = AESEncryptedField(max_length=63, help_text=_("Password."))
default_switch = models.BooleanField(
default=True, unique=True, help_text=_("Default credentials for switches.")
)
class Meta:
permissions = (
(
"view_switchmanagementcred",
_("Can view a switch management credentials object"),
),
)
verbose_name = _("switch management credentials")
def __str__(self):
return _("Switch login ") + str(self.management_id)
class Reminder(AclMixin, models.Model):
"""Options pour les mails de notification de fin d'adhésion.
Days: liste des nombres de jours pour lesquells un mail est envoyé
optionalMessage: message additionel pour le mail
"""
days = models.IntegerField(
default=7,
unique=True,
help_text=_("Delay between the email and the membership's end."),
)
message = models.TextField(
default="",
null=True,
blank=True,
help_text=_("Message displayed specifically for this reminder."),
)
class Meta:
permissions = (("view_reminder", _("Can view a reminder object")),)
verbose_name = _("reminder")
verbose_name_plural = _("reminders")
def users_to_remind(self):
from re2o.utils import all_has_access
date = timezone.now().replace(minute=0, hour=0)
futur_date = date + timedelta(days=self.days)
users = all_has_access(futur_date).exclude(
pk__in=all_has_access(futur_date + timedelta(days=1))
)
return users
class GeneralOption(AclMixin, PreferencesModel):
"""Options générales : nombre de resultats par page, nom du site,
temps où les liens sont valides"""
general_message_fr = models.TextField(
default="",
blank=True,
help_text=_(
"General message displayed on the French version of the"
" website (e.g. in case of maintenance)."
),
)
general_message_en = models.TextField(
default="",
blank=True,
help_text=_(
"General message displayed on the English version of the"
" website (e.g. in case of maintenance)."
),
)
search_display_page = models.IntegerField(default=15)
pagination_number = models.IntegerField(default=25)
pagination_large_number = models.IntegerField(default=8)
req_expire_hrs = models.IntegerField(default=48)
site_name = models.CharField(max_length=32, default="Re2o")
email_from = models.EmailField(default="www-data@example.com")
main_site_url = models.URLField(max_length=255, default="http://re2o.example.org")
GTU_sum_up = models.TextField(default="", blank=True)
GTU = models.FileField(upload_to="", default="", null=True, blank=True)
class Meta:
permissions = (("view_generaloption", _("Can view the general preferences")),)
verbose_name = _("general preferences")
@receiver(post_save, sender=GeneralOption)
def generaloption_post_save(**kwargs):
"""Ecriture dans le cache"""
general_pref = kwargs["instance"]
general_pref.set_in_cache()
class Service(AclMixin, models.Model):
"""Liste des services affichés sur la page d'accueil : url, description,
image et nom"""
name = models.CharField(max_length=32)
url = models.URLField()
description = models.TextField()
image = models.ImageField(upload_to="logo", blank=True)
class Meta:
permissions = (("view_service", _("Can view the service preferences")),)
verbose_name = _("service")
verbose_name_plural = _("services")
def __str__(self):
return str(self.name)
class MailContact(AclMixin, models.Model):
"""Contact email adress with a commentary."""
address = models.EmailField(
default="contact@example.org", help_text=_("Contact email address.")
)
commentary = models.CharField(
blank=True,
null=True,
help_text=_("Description of the associated email address."),
max_length=256,
)
@cached_property
def get_name(self):
return self.address.split("@")[0]
class Meta:
permissions = (
("view_mailcontact", _("Can view a contact email address object")),
)
verbose_name = _("contact email address")
verbose_name_plural = _("contact email addresses")
def __str__(self):
return self.address
class Mandate(RevMixin, AclMixin, models.Model):
class Meta:
verbose_name = _("mandate")
verbose_name_plural = _("mandates")
permissions = (("view_mandate", _("Can view a mandate object")),)
president = models.ForeignKey(
"users.User",
on_delete=models.SET_NULL,
null=True,
blank=True,
verbose_name=_("president of the association"),
help_text=_("Displayed on subscription vouchers."),
)
start_date = models.DateTimeField(verbose_name=_("start date"))
end_date = models.DateTimeField(verbose_name=_("end date"), blank=True, null=True)
@classmethod
def get_mandate(cls, date=timezone.now):
""""Find the mandate taking place at the given date."""
if callable(date):
date = date()
mandate = (
cls.objects.exclude(end_date__lte=date).order_by("start_date").first()
or cls.objects.order_by("start_date").last()
)
if not mandate:
raise cls.DoesNotExist(
_("No mandates have been created. Please go to the preferences page to create one.")
)
return mandate
def is_over(self):
return self.end_date is None
def __str__(self):
return str(self.president) + " " + str(self.start_date.year)
class AssoOption(AclMixin, PreferencesModel):
"""Options générales de l'asso : siret, addresse, nom, etc"""
name = models.CharField(
default=_("Networking organisation school Something"), max_length=256
)
siret = models.CharField(default="00000000000000", max_length=32)
adresse1 = models.CharField(default=_("Threadneedle Street"), max_length=128)
adresse2 = models.CharField(default=_("London EC2R 8AH"), max_length=128)
contact = models.EmailField(default="contact@example.org")
telephone = models.CharField(max_length=15, default="0000000000")
pseudo = models.CharField(default=_("Organisation"), max_length=32)
utilisateur_asso = models.OneToOneField(
"users.User", on_delete=models.PROTECT, blank=True, null=True
)
description = models.TextField(null=True, blank=True)
class Meta:
permissions = (("view_assooption", _("Can view the organisation preferences")),)
verbose_name = _("organisation preferences")
@receiver(post_save, sender=AssoOption)
def assooption_post_save(**kwargs):
"""Ecriture dans le cache"""
asso_pref = kwargs["instance"]
asso_pref.set_in_cache()
class HomeOption(AclMixin, PreferencesModel):
"""Settings of the home page (facebook/twitter etc)"""
facebook_url = models.URLField(null=True, blank=True)
twitter_url = models.URLField(null=True, blank=True)
twitter_account_name = models.CharField(max_length=32, null=True, blank=True)
class Meta:
permissions = (("view_homeoption", _("Can view the homepage preferences")),)
verbose_name = _("homepage preferences")
@receiver(post_save, sender=HomeOption)
def homeoption_post_save(**kwargs):
"""Ecriture dans le cache"""
home_pref = kwargs["instance"]
home_pref.set_in_cache()
class MailMessageOption(AclMixin, models.Model):
"""Reglages, mail de bienvenue et autre"""
welcome_mail_fr = models.TextField(
default="", blank=True, help_text=_("Welcome email in French.")
)
welcome_mail_en = models.TextField(
default="", blank=True, help_text=_("Welcome email in English.")
)
class Meta:
permissions = (
("view_mailmessageoption", _("Can view the email message preferences")),
)
verbose_name = _("email message preferences")
class RadiusAttribute(RevMixin, AclMixin, models.Model):
class Meta:
verbose_name = _("RADIUS attribute")
verbose_name_plural = _("RADIUS attributes")
attribute = models.CharField(
max_length=255,
verbose_name=_("attribute"),
help_text=_("See https://freeradius.org/rfc/attributes.html."),
)
value = models.CharField(max_length=255, verbose_name=_("value"))
comment = models.TextField(
verbose_name=_("comment"),
help_text=_("Use this field to document this attribute."),
blank=True,
default="",
)
def __str__(self):
return " ".join([self.attribute, "=", self.value])
class RadiusOption(AclMixin, PreferencesModel):
class Meta:
verbose_name = _("RADIUS policy")
verbose_name_plural = _("RADIUS policies")
MACHINE = "MACHINE"
DEFINED = "DEFINED"
CHOICE_RADIUS = (
(MACHINE, _("On the IP range's VLAN of the machine")),
(DEFINED, _("Preset in \"VLAN for machines accepted by RADIUS\"")),
)
REJECT = "REJECT"
SET_VLAN = "SET_VLAN"
CHOICE_POLICY = (
(REJECT, _("Reject the machine")),
(SET_VLAN, _("Place the machine on the VLAN")),
)
radius_general_policy = models.CharField(
max_length=32, choices=CHOICE_RADIUS, default="DEFINED"
)
unknown_machine = models.CharField(
max_length=32,
choices=CHOICE_POLICY,
default=REJECT,
verbose_name=_("policy for unknown machines"),
)
unknown_machine_vlan = models.ForeignKey(
"machines.Vlan",
on_delete=models.PROTECT,
related_name="unknown_machine_vlan",
blank=True,
null=True,
verbose_name=_("unknown machines VLAN"),
help_text=_("VLAN for unknown machines if not rejected."),
)
unknown_machine_attributes = models.ManyToManyField(
RadiusAttribute,
related_name="unknown_machine_attribute",
blank=True,
verbose_name=_("unknown machines attributes"),
help_text=_("Answer attributes for unknown machines."),
)
unknown_port = models.CharField(
max_length=32,
choices=CHOICE_POLICY,
default=REJECT,
verbose_name=_("policy for unknown ports"),
)
unknown_port_vlan = models.ForeignKey(
"machines.Vlan",
on_delete=models.PROTECT,
related_name="unknown_port_vlan",
blank=True,
null=True,
verbose_name=_("unknown ports VLAN"),
help_text=_("VLAN for unknown ports if not rejected."),
)
unknown_port_attributes = models.ManyToManyField(
RadiusAttribute,
related_name="unknown_port_attribute",
blank=True,
verbose_name=_("unknown ports attributes"),
help_text=_("Answer attributes for unknown ports."),
)
unknown_room = models.CharField(
max_length=32,
choices=CHOICE_POLICY,
default=REJECT,
verbose_name=_(
"Policy for machines connecting from unregistered rooms"
" (relevant on ports with STRICT RADIUS mode)"
),
)
unknown_room_vlan = models.ForeignKey(
"machines.Vlan",
related_name="unknown_room_vlan",
on_delete=models.PROTECT,
blank=True,
null=True,
verbose_name=_("unknown rooms VLAN"),
help_text=_("VLAN for unknown rooms if not rejected."),
)
unknown_room_attributes = models.ManyToManyField(
RadiusAttribute,
related_name="unknown_room_attribute",
blank=True,
verbose_name=_("unknown rooms attributes"),
help_text=_("Answer attributes for unknown rooms."),
)
non_member = models.CharField(
max_length=32,
choices=CHOICE_POLICY,
default=REJECT,
verbose_name=_("policy for non members"),
)
non_member_vlan = models.ForeignKey(
"machines.Vlan",
related_name="non_member_vlan",
on_delete=models.PROTECT,
blank=True,
null=True,
verbose_name=_("non members VLAN"),
help_text=_("VLAN for non members if not rejected."),
)
non_member_attributes = models.ManyToManyField(
RadiusAttribute,
related_name="non_member_attribute",
blank=True,
verbose_name=_("non members attributes"),
help_text=_("Answer attributes for non members."),
)
banned = models.CharField(
max_length=32,
choices=CHOICE_POLICY,
default=REJECT,
verbose_name=_("policy for banned users"),
)
banned_vlan = models.ForeignKey(
"machines.Vlan",
related_name="banned_vlan",
on_delete=models.PROTECT,
blank=True,
null=True,
verbose_name=_("banned users VLAN"),
help_text=_("VLAN for banned users if not rejected."),
)
banned_attributes = models.ManyToManyField(
RadiusAttribute,
related_name="banned_attribute",
blank=True,
verbose_name=_("banned users attributes"),
help_text=_("Answer attributes for banned users."),
)
vlan_decision_ok = models.OneToOneField(
"machines.Vlan",
on_delete=models.PROTECT,
related_name="vlan_ok_option",
blank=True,
null=True,
)
ok_attributes = models.ManyToManyField(
RadiusAttribute,
related_name="ok_attribute",
blank=True,
verbose_name=_("accepted users attributes"),
help_text=_("Answer attributes for accepted users."),
)
@classmethod
def get_attributes(cls, name, attribute_kwargs={}):
return (
(str(attribute.attribute), str(attribute.value % attribute_kwargs))
for attribute in cls.get_cached_value(name).all()
)
def default_invoice():
tpl, _ = DocumentTemplate.objects.get_or_create(
name="Re2o default invoice", template="templates/default_invoice.tex"
)
return tpl.id
def default_voucher():
tpl, _ = DocumentTemplate.objects.get_or_create(
name="Re2o default voucher", template="templates/default_voucher.tex"
)
return tpl.id
class CotisationsOption(AclMixin, PreferencesModel):
class Meta:
verbose_name = _("subscription preferences")
invoice_template = models.OneToOneField(
"preferences.DocumentTemplate",
verbose_name=_("template for invoices"),
related_name="invoice_template",
on_delete=models.PROTECT,
default=default_invoice,
)
voucher_template = models.OneToOneField(
"preferences.DocumentTemplate",
verbose_name=_("template for subscription vouchers"),
related_name="voucher_template",
on_delete=models.PROTECT,
default=default_voucher,
)
send_voucher_mail = models.BooleanField(
verbose_name=_("send voucher by email when the invoice is controlled"),
help_text=_(
"Be careful, if no mandate is defined on the preferences page,"
" errors will be triggered when generating vouchers."
),
default=False,
)
class DocumentTemplate(RevMixin, AclMixin, models.Model):
"""Represent a template in order to create documents such as invoice or
subscription voucher.
"""
template = models.FileField(upload_to="templates/", verbose_name=_("template"))
name = models.CharField(max_length=125, verbose_name=_("name"), unique=True)
class Meta:
verbose_name = _("document template")
verbose_name_plural = _("document templates")
def __str__(self):
return str(self.name)
@receiver(models.signals.post_delete, sender=DocumentTemplate)
def auto_delete_file_on_delete(sender, instance, **kwargs):
"""
Deletes file from filesystem
when corresponding `DocumentTemplate` object is deleted.
"""
if instance.template:
if os.path.isfile(instance.template.path):
os.remove(instance.template.path)
@receiver(models.signals.pre_save, sender=DocumentTemplate)
def auto_delete_file_on_change(sender, instance, **kwargs):
"""
Deletes old file from filesystem
when corresponding `DocumentTemplate` object is updated
with new file.
"""
if not instance.pk:
return False
try:
old_file = DocumentTemplate.objects.get(pk=instance.pk).template
except DocumentTemplate.DoesNotExist:
return False
new_file = instance.template
if not old_file == new_file:
if os.path.isfile(old_file.path):
os.remove(old_file.path)
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