mirror of https://gitlab.crans.org/bde/nk20
The memoization doesn't work when objects don't have a primary key.
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@ -61,7 +61,7 @@ class MembershipTable(tables.Table):
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def render_club(self, value):
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s = value.name
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if PermissionBackend().has_perm(get_current_authenticated_user(), "member.view_club", value):
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if PermissionBackend.check_perm(get_current_authenticated_user(), "member.view_club", value):
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s = format_html("<a href={url}>{name}</a>",
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url=reverse_lazy('member:club_detail', kwargs={"pk": value.pk}), name=s)
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@ -86,7 +86,7 @@ class MembershipTable(tables.Table):
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date_end=datetime.now().date(),
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fee=0,
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)
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if PermissionBackend().has_perm(get_current_authenticated_user(),
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if PermissionBackend.check_perm(get_current_authenticated_user(),
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"member:add_membership", empty_membership): # If the user has right
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t = format_html(t + ' <a class="btn btn-warning" href="{url}">{text}</a>',
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url=reverse_lazy('member:club_renew_membership',
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@ -96,7 +96,7 @@ class MembershipTable(tables.Table):
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def render_roles(self, record):
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roles = record.roles.all()
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s = ", ".join(str(role) for role in roles)
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if PermissionBackend().has_perm(get_current_authenticated_user(), "member.change_membership_roles", record):
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if PermissionBackend.check_perm(get_current_authenticated_user(), "member.change_membership_roles", record):
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s = format_html("<a href='" + str(reverse_lazy("member:club_manage_roles", kwargs={"pk": record.pk}))
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+ "'>" + s + "</a>")
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return s
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@ -299,7 +299,7 @@ class ClubDetailView(ProtectQuerysetMixin, LoginRequiredMixin, DetailView):
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context = super().get_context_data(**kwargs)
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club = context["club"]
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if PermissionBackend().has_perm(self.request.user, "member.change_club_membership_start", club):
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if PermissionBackend.check_perm(self.request.user, "member.change_club_membership_start", club):
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club.update_membership_dates()
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club_transactions = Transaction.objects.all().filter(Q(source=club.note) | Q(destination=club.note))\
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@ -114,8 +114,16 @@ class PermissionBackend(ModelBackend):
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query = query | perm.query
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return query
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@staticmethod
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@memoize
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def has_perm(self, user_obj, perm, obj=None):
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def check_perm(user_obj, perm, obj=None):
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"""
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Check is the given user has the permission over a given object.
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The result is then memoized.
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Exception: for add permissions, since the object is not hashable since it doesn't have any
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primary key, the result is not memoized. Moreover, the right could change
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(e.g. for a transaction, the balance of the user could change)
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"""
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if user_obj is None or isinstance(user_obj, AnonymousUser):
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return False
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@ -134,10 +142,13 @@ class PermissionBackend(ModelBackend):
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perm_field = perm[2] if len(perm) == 3 else None
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ct = ContentType.objects.get_for_model(obj)
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if any(permission.applies(obj, perm_type, perm_field)
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for permission in self.permissions(user_obj, ct, perm_type)):
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for permission in PermissionBackend.permissions(user_obj, ct, perm_type)):
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return True
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return False
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def has_perm(self, user_obj, perm, obj=None):
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return PermissionBackend.check_perm(user_obj, perm, obj)
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def has_module_perms(self, user_obj, app_label):
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return False
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@ -49,7 +49,10 @@ def memoize(f):
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# lru_cache makes the job of memoization
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# We store only the 512 latest data per session. It has to be enough.
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sess_funs[sess_key] = lru_cache(512)(f)
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try:
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return sess_funs[sess_key](*args, **kwargs)
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except TypeError: # For add permissions, objects are not hashable (not yet created). Don't memoize this case.
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return f(*args, **kwargs)
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func.func_name = f.__name__
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@ -44,7 +44,7 @@ class StrongDjangoObjectPermissions(DjangoObjectPermissions):
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perms = self.get_required_object_permissions(request.method, model_cls)
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# if not user.has_perms(perms, obj):
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if not all(PermissionBackend().has_perm(user, perm, obj) for perm in perms):
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if not all(PermissionBackend.check_perm(user, perm, obj) for perm in perms):
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# If the user does not have permissions we need to determine if
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# they have read permissions to see 403, or not, and simply see
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# a 404 response.
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@ -44,7 +44,7 @@ def pre_save_object(sender, instance, **kwargs):
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# We check if the user can change the model
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# If the user has all right on a model, then OK
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if PermissionBackend().has_perm(user, app_label + ".change_" + model_name, instance):
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if PermissionBackend.check_perm(user, app_label + ".change_" + model_name, instance):
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return
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# In the other case, we check if he/she has the right to change one field
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@ -56,11 +56,11 @@ def pre_save_object(sender, instance, **kwargs):
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# If the field wasn't modified, no need to check the permissions
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if old_value == new_value:
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continue
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if not PermissionBackend().has_perm(user, app_label + ".change_" + model_name + "_" + field_name, instance):
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if not PermissionBackend.check_perm(user, app_label + ".change_" + model_name + "_" + field_name, instance):
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raise PermissionDenied
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else:
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# We check if the user has right to add the object
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has_perm = PermissionBackend().has_perm(user, app_label + ".add_" + model_name, instance)
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has_perm = PermissionBackend.check_perm(user, app_label + ".add_" + model_name, instance)
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if not has_perm:
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raise PermissionDenied
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@ -87,5 +87,5 @@ def pre_delete_object(instance, **kwargs):
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model_name = model_name_full[1]
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# We check if the user has rights to delete the object
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if not PermissionBackend().has_perm(user, app_label + ".delete_" + model_name, instance):
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if not PermissionBackend.check_perm(user, app_label + ".delete_" + model_name, instance):
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raise PermissionDenied
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@ -54,7 +54,7 @@ def model_list(model_name, t="view"):
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def has_perm(perm, obj):
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return PermissionBackend().has_perm(get_current_authenticated_user(), perm, obj)
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return PermissionBackend.check_perm(get_current_authenticated_user(), perm, obj)
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def can_create_transaction():
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@ -77,7 +77,7 @@ def can_create_transaction():
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amount=0,
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reason="Check permissions",
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)
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session["can_create_transaction"] = PermissionBackend().has_perm(user, "note.add_transaction", empty_transaction)
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session["can_create_transaction"] = PermissionBackend.check_perm(user, "note.add_transaction", empty_transaction)
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return session.get("can_create_transaction") == 1
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