Models

Club

Bases: Model

The Club class, made as a tree to allow nice tidy organization.

president()

Fetch the membership of the current president of this club.

Source code in club/models.py

@cached_property
def president(self) -> Membership | None:
    """Fetch the membership of the current president of this club."""
    return self.members.filter(
        role=settings.SITH_CLUB_ROLES_ID["President"], end_date=None
    ).first()

check_loop()

Raise a validation error when a loop is found within the parent list.

Source code in club/models.py

def check_loop(self):
    """Raise a validation error when a loop is found within the parent list."""
    objs = []
    cur = self
    while cur.parent is not None:
        if cur in objs:
            raise ValidationError(_("You can not make loops in clubs"))
        objs.append(cur)
        cur = cur.parent

is_owned_by(user)

Method to see if that object can be super edited by the given user.

Source code in club/models.py

def is_owned_by(self, user: User) -> bool:
    """Method to see if that object can be super edited by the given user."""
    if user.is_anonymous:
        return False
    return user.is_root or user.is_board_member

can_be_edited_by(user)

Method to see if that object can be edited by the given user.

Source code in club/models.py

def can_be_edited_by(self, user: User) -> bool:
    """Method to see if that object can be edited by the given user."""
    return self.has_rights_in_club(user)

can_be_viewed_by(user)

Method to see if that object can be seen by the given user.

Source code in club/models.py

def can_be_viewed_by(self, user: User) -> bool:
    """Method to see if that object can be seen by the given user."""
    return user.was_subscribed

get_membership_for(user)

Return the current membership the given user.

Note

The result is cached.

Source code in club/models.py

def get_membership_for(self, user: User) -> Membership | None:
    """Return the current membership the given user.

    Note:
        The result is cached.
    """
    if user.is_anonymous:
        return None
    membership = cache.get(f"membership_{self.id}_{user.id}")
    if membership == "not_member":
        return None
    if membership is None:
        membership = self.members.filter(user=user, end_date=None).first()
        if membership is None:
            cache.set(f"membership_{self.id}_{user.id}", "not_member")
        else:
            cache.set(f"membership_{self.id}_{user.id}", membership)
    return membership

Group

Bases: Group

Wrapper around django.auth.Group

BanGroup

Bases: Group

An anti-group, that removes permissions instead of giving them.

Users are linked to BanGroups through UserBan objects.

Example

user = User.objects.get(username="...")
ban_group = BanGroup.objects.first()
UserBan.objects.create(user=user, ban_group=ban_group, reason="...")

assert user.ban_groups.contains(ban_group)

UserQuerySet

Bases: QuerySet

CustomUserManager

Bases: from_queryset(UserQuerySet)

User

Bases: AbstractUser

Defines the base user class, useable in every app.

This is almost the same as the auth module AbstractUser since it inherits from it, but some fields are required, and the username is generated automatically with the name of the user (see generate_username()).

Added field: nick_name, date_of_birth Required fields: email, first_name, last_name, date_of_birth

cached_groups property

Get the list of groups this user is in.

The result is cached for the default duration (should be 5 minutes)

Returns: A list of all the groups this user is in.

is_in_group(*, pk=None, name=None)

Check if this user is in the given group. Either a group id or a group name must be provided. If both are passed, only the id will be considered.

The group will be fetched using the given parameter. If no group is found, return False. If a group is found, check if this user is in the latter.

Returns:

Type	Description
bool	True if the user is the group, else False

Source code in core/models.py

def is_in_group(self, *, pk: int | None = None, name: str | None = None) -> bool:
    """Check if this user is in the given group.
    Either a group id or a group name must be provided.
    If both are passed, only the id will be considered.

    The group will be fetched using the given parameter.
    If no group is found, return False.
    If a group is found, check if this user is in the latter.

    Returns:
         True if the user is the group, else False
    """
    if pk is not None:
        group: Optional[Group] = get_group(pk=pk)
    elif name is not None:
        group: Optional[Group] = get_group(name=name)
    else:
        raise ValueError("You must either provide the id or the name of the group")
    if group is None:
        return False
    if group.id == settings.SITH_GROUP_PUBLIC_ID:
        return True
    if group.id == settings.SITH_GROUP_SUBSCRIBERS_ID:
        return self.is_subscribed
    if group.id == settings.SITH_GROUP_OLD_SUBSCRIBERS_ID:
        return self.was_subscribed
    if group.id == settings.SITH_GROUP_ROOT_ID:
        return self.is_root
    return group in self.cached_groups

age()

Return the age this user has the day the method is called. If the user has not filled his age, return 0.

Source code in core/models.py

@cached_property
def age(self) -> int:
    """Return the age this user has the day the method is called.
    If the user has not filled his age, return 0.
    """
    if self.date_of_birth is None:
        return 0
    today = timezone.now()
    age = today.year - self.date_of_birth.year
    # remove a year if this year's birthday is yet to come
    age -= (today.month, today.day) < (
        self.date_of_birth.month,
        self.date_of_birth.day,
    )
    return age

get_short_name()

Returns the short name for the user.

Source code in core/models.py

def get_short_name(self):
    """Returns the short name for the user."""
    if self.nick_name:
        return self.nick_name
    return self.first_name + " " + self.last_name

get_display_name()

Returns the display name of the user.

A nickname if possible, otherwise, the full name.

Source code in core/models.py

def get_display_name(self) -> str:
    """Returns the display name of the user.

    A nickname if possible, otherwise, the full name.
    """
    if self.nick_name:
        return "%s (%s)" % (self.get_full_name(), self.nick_name)
    return self.get_full_name()

get_family(godfathers_depth=4, godchildren_depth=4)

Get the family of the user, with the given depth.

Parameters:

Name	Type	Description	Default
godfathers_depth	NonNegativeInt	The number of generations of godfathers to fetch	4
godchildren_depth	NonNegativeInt	The number of generations of godchildren to fetch	4

Returns:

Type	Description
set[through]	A list of family relationships in this user's family

Source code in core/models.py

def get_family(
    self,
    godfathers_depth: NonNegativeInt = 4,
    godchildren_depth: NonNegativeInt = 4,
) -> set[User.godfathers.through]:
    """Get the family of the user, with the given depth.

    Args:
        godfathers_depth: The number of generations of godfathers to fetch
        godchildren_depth: The number of generations of godchildren to fetch

    Returns:
        A list of family relationships in this user's family
    """
    res = []
    for depth, key, reverse_key in [
        (godfathers_depth, "from_user_id", "to_user_id"),
        (godchildren_depth, "to_user_id", "from_user_id"),
    ]:
        if depth == 0:
            continue
        links = list(User.godfathers.through.objects.filter(**{key: self.id}))
        res.extend(links)
        for _ in range(1, depth):  # noqa: F402 we don't care about gettext here
            ids = [getattr(c, reverse_key) for c in links]
            links = list(
                User.godfathers.through.objects.filter(
                    **{f"{key}__in": ids}
                ).exclude(id__in=[r.id for r in res])
            )
            if not links:
                break
            res.extend(links)
    return set(res)

email_user(subject, message, from_email=None, **kwargs)

Sends an email to this User.

Source code in core/models.py

def email_user(self, subject, message, from_email=None, **kwargs):
    """Sends an email to this User."""
    if from_email is None:
        from_email = settings.DEFAULT_FROM_EMAIL
    send_mail(subject, message, from_email, [self.email], **kwargs)

generate_username()

Generates a unique username based on the first and last names.

For example: Guy Carlier gives gcarlier, and gcarlier1 if the first one exists.

Returns:

Type	Description
str	The generated username.

Source code in core/models.py

def generate_username(self) -> str:
    """Generates a unique username based on the first and last names.

    For example: Guy Carlier gives gcarlier, and gcarlier1 if the first one exists.

    Returns:
        The generated username.
    """

    def remove_accents(data):
        return "".join(
            x
            for x in unicodedata.normalize("NFKD", data)
            if unicodedata.category(x)[0] == "L"
        ).lower()

    user_name = (
        remove_accents(self.first_name[0] + self.last_name)
        .encode("ascii", "ignore")
        .decode("utf-8")
    )
    # load all usernames which could conflict with the new one.
    # we need to actually load them, instead of performing a count,
    # because we cannot be sure that two usernames refer to the
    # actual same word (eg. tmore and tmoreau)
    possible_conflicts: list[str] = list(
        User.objects.filter(username__startswith=user_name).values_list(
            "username", flat=True
        )
    )
    nb_conflicts = sum(
        1 for name in possible_conflicts if name.rstrip(string.digits) == user_name
    )
    if nb_conflicts > 0:
        user_name += str(nb_conflicts)  # exemple => exemple1
    self.username = user_name
    return user_name

is_owner(obj)

Determine if the object is owned by the user.

Source code in core/models.py

def is_owner(self, obj):
    """Determine if the object is owned by the user."""
    if hasattr(obj, "is_owned_by") and obj.is_owned_by(self):
        return True
    if hasattr(obj, "owner_group") and self.is_in_group(pk=obj.owner_group.id):
        return True
    return self.is_root

can_edit(obj)

Determine if the object can be edited by the user.

Source code in core/models.py

def can_edit(self, obj):
    """Determine if the object can be edited by the user."""
    if hasattr(obj, "can_be_edited_by") and obj.can_be_edited_by(self):
        return True
    if hasattr(obj, "edit_groups"):
        for pk in obj.edit_groups.values_list("pk", flat=True):
            if self.is_in_group(pk=pk):
                return True
    if isinstance(obj, User) and obj == self:
        return True
    return self.is_owner(obj)

can_view(obj)

Determine if the object can be viewed by the user.

Source code in core/models.py

def can_view(self, obj):
    """Determine if the object can be viewed by the user."""
    if hasattr(obj, "can_be_viewed_by") and obj.can_be_viewed_by(self):
        return True
    if hasattr(obj, "view_groups"):
        for pk in obj.view_groups.values_list("pk", flat=True):
            if self.is_in_group(pk=pk):
                return True
    return self.can_edit(obj)

clubs_with_rights()

The list of clubs where the user has rights

Source code in core/models.py

@cached_property
def clubs_with_rights(self) -> list[Club]:
    """The list of clubs where the user has rights"""
    memberships = self.memberships.ongoing().board().select_related("club")
    return [m.club for m in memberships]

AnonymousUser()

Bases: AnonymousUser

Source code in core/models.py

def __init__(self):
    super().__init__()

is_in_group(*, pk=None, name=None)

The anonymous user is only in the public group.

Source code in core/models.py

def is_in_group(self, *, pk: int | None = None, name: str | None = None) -> bool:
    """The anonymous user is only in the public group."""
    allowed_id = settings.SITH_GROUP_PUBLIC_ID
    if pk is not None:
        return pk == allowed_id
    elif name is not None:
        group = get_group(name=name)
        return group is not None and group.id == allowed_id
    else:
        raise ValueError("You must either provide the id or the name of the group")

UserBan

Bases: Model

A ban of a user.

A user can be banned for a specific reason, for a specific duration. The expiration date is indicative, and the ban should be removed manually.

Preferences

Bases: Model

SithFile

Bases: Model

clean()

Cleans up the file.

Source code in core/models.py

def clean(self):
    """Cleans up the file."""
    super().clean()
    if "/" in self.name:
        raise ValidationError(_("Character '/' not authorized in name"))
    if self == self.parent:
        raise ValidationError(_("Loop in folder tree"), code="loop")
    if self == self.parent or (
        self.parent is not None and self in self.get_parent_list()
    ):
        raise ValidationError(_("Loop in folder tree"), code="loop")
    if self.parent and self.parent.is_file:
        raise ValidationError(
            _("You can not make a file be a children of a non folder file")
        )
    if (
        self.parent is None
        and SithFile.objects.exclude(id=self.id)
        .filter(parent=None, name=self.name)
        .exists()
    ) or (
        self.parent
        and self.parent.children.exclude(id=self.id).filter(name=self.name).exists()
    ):
        raise ValidationError(_("Duplicate file"), code="duplicate")
    if self.is_folder:
        if self.file:
            try:
                import imghdr

                if imghdr.what(None, self.file.read()) not in [
                    "gif",
                    "png",
                    "jpeg",
                ]:
                    self.file.delete()
                    self.file = None
            except:  # noqa E722 I don't know the exception that can be raised
                self.file = None
        self.mime_type = "inode/directory"
    if self.is_file and (self.file is None or self.file == ""):
        raise ValidationError(_("You must provide a file"))

apply_rights_recursively(*, only_folders=False)

Apply the rights of this file to all children recursively.

Parameters:

Name	Type	Description	Default
only_folders	bool	If True, only apply the rights to SithFiles that are folders.	False

Source code in core/models.py

def apply_rights_recursively(self, *, only_folders: bool = False) -> None:
    """Apply the rights of this file to all children recursively.

    Args:
        only_folders: If True, only apply the rights to SithFiles that are folders.
    """
    file_ids = []
    explored_ids = [self.id]
    while len(explored_ids) > 0:  # find all children recursively
        file_ids.extend(explored_ids)
        next_level = SithFile.objects.filter(parent_id__in=explored_ids)
        if only_folders:
            next_level = next_level.filter(is_folder=True)
        explored_ids = list(next_level.values_list("id", flat=True))
    for through in (SithFile.view_groups.through, SithFile.edit_groups.through):
        # force evaluation. Without this, the iterator yields nothing
        groups = list(
            through.objects.filter(sithfile_id=self.id).values_list(
                "group_id", flat=True
            )
        )
        # delete previous rights
        through.objects.filter(sithfile_id__in=file_ids).delete()
        through.objects.bulk_create(  # create new rights
            [through(sithfile_id=f, group_id=g) for f in file_ids for g in groups]
        )

copy_rights()

Copy, if possible, the rights of the parent folder.

Source code in core/models.py

def copy_rights(self):
    """Copy, if possible, the rights of the parent folder."""
    if self.parent is not None:
        self.edit_groups.set(self.parent.edit_groups.all())
        self.view_groups.set(self.parent.view_groups.all())

move_to(parent)

Move a file to a new parent. parent must be a SithFile with the is_folder=True property. Otherwise, this function doesn't change anything. This is done only at the DB level, so that it's very fast for the user. Indeed, this function doesn't modify SithFiles recursively, so it stays efficient even with top-level folders.

Source code in core/models.py

def move_to(self, parent):
    """Move a file to a new parent.
    `parent` must be a SithFile with the `is_folder=True` property. Otherwise, this function doesn't change
    anything.
    This is done only at the DB level, so that it's very fast for the user. Indeed, this function doesn't modify
    SithFiles recursively, so it stays efficient even with top-level folders.
    """
    if not parent.is_folder:
        return
    self.parent = parent
    self.clean()
    self.save()

LockError

Bases: Exception

There was a lock error on the object.

AlreadyLocked

Bases: LockError

The object is already locked.

NotLocked

Bases: LockError

The object is not locked.

Page

Bases: Model

The page class to build a Wiki Each page may have a parent and it's URL is of the form my.site/page/// It has an ID field, but don't use it, since it's only there for DB part, and because compound primary key is awkward! Prefere querying pages with Page.get_page_by_full_name().

Be careful with the _full_name attribute: this field may not be valid until you call save(). It's made for fast query, but don't rely on it when playing with a Page object, use get_full_name() instead!

save(*args, **kwargs)

Performs some needed actions before and after saving a page in database.

Source code in core/models.py

def save(self, *args, **kwargs):
    """Performs some needed actions before and after saving a page in database."""
    locked = kwargs.pop("force_lock", False)
    if not locked:
        locked = self.is_locked()
    if not locked:
        raise NotLocked("The page is not locked and thus can not be saved")
    self.full_clean()
    if not self.id:
        super().save(
            *args, **kwargs
        )  # Save a first time to correctly set _full_name
    # This reset the _full_name just before saving to maintain a coherent field quicker for queries than the
    # recursive method
    # It also update all the children to maintain correct names
    self._full_name = self.get_full_name()
    for c in self.children.all():
        c.save()
    super().save(*args, **kwargs)
    self.unset_lock()

get_page_by_full_name(name) staticmethod

Quicker to get a page with that method rather than building the request every time.

Source code in core/models.py

@staticmethod
def get_page_by_full_name(name):
    """Quicker to get a page with that method rather than building the request every time."""
    return Page.objects.filter(_full_name=name).first()

clean()

Cleans up only the name for the moment, but this can be used to make any treatment before saving the object.

Source code in core/models.py

def clean(self):
    """Cleans up only the name for the moment, but this can be used to make any treatment before saving the object."""
    if "/" in self.name:
        self.name = self.name.split("/")[-1]
    if (
        Page.objects.exclude(pk=self.pk)
        .filter(_full_name=self.get_full_name())
        .exists()
    ):
        raise ValidationError(_("Duplicate page"), code="duplicate")
    super().clean()
    if self.parent is not None and self in self.get_parent_list():
        raise ValidationError(_("Loop in page tree"), code="loop")

is_locked()

Is True if the page is locked, False otherwise.

This is where the timeout is handled, so a locked page for which the timeout is reach will be unlocked and this function will return False.

Source code in core/models.py

def is_locked(self):
    """Is True if the page is locked, False otherwise.

    This is where the timeout is handled,
    so a locked page for which the timeout is reach will be unlocked and this
    function will return False.
    """
    if self.lock_timeout and (
        timezone.now() - self.lock_timeout > timedelta(minutes=5)
    ):
        self.unset_lock()
    return (
        self.lock_user
        and self.lock_timeout
        and (timezone.now() - self.lock_timeout < timedelta(minutes=5))
    )

set_lock(user)

Sets a lock on the current page or raise an AlreadyLocked exception.

Source code in core/models.py

def set_lock(self, user):
    """Sets a lock on the current page or raise an AlreadyLocked exception."""
    if self.is_locked() and self.get_lock() != user:
        raise AlreadyLocked("The page is already locked by someone else")
    self.lock_user = user
    self.lock_timeout = timezone.now()
    super().save()

set_lock_recursive(user)

Locks recursively all the child pages for editing properties.

Source code in core/models.py

def set_lock_recursive(self, user):
    """Locks recursively all the child pages for editing properties."""
    for p in self.children.all():
        p.set_lock_recursive(user)
    self.set_lock(user)

unset_lock_recursive()

Unlocks recursively all the child pages.

Source code in core/models.py

def unset_lock_recursive(self):
    """Unlocks recursively all the child pages."""
    for p in self.children.all():
        p.unset_lock_recursive()
    self.unset_lock()

unset_lock()

Always try to unlock, even if there is no lock.

Source code in core/models.py

def unset_lock(self):
    """Always try to unlock, even if there is no lock."""
    self.lock_user = None
    self.lock_timeout = None
    super().save()

get_lock()

Returns the page's mutex containing the time and the user in a dict.

Source code in core/models.py

def get_lock(self):
    """Returns the page's mutex containing the time and the user in a dict."""
    if self.lock_user:
        return self.lock_user
    raise NotLocked("The page is not locked and thus can not return its user")

get_full_name()

Computes the real full_name of the page based on its name and its parent's name You can and must rely on this function when working on a page object that is not freshly fetched from the DB (For example when treating a Page object coming from a form).

Source code in core/models.py

def get_full_name(self):
    """Computes the real full_name of the page based on its name and its parent's name
    You can and must rely on this function when working on a page object that is not freshly fetched from the DB
    (For example when treating a Page object coming from a form).
    """
    if self.parent is None:
        return self.name
    return f"{self.parent.get_full_name()}/{self.name}"

PageRev

Bases: Model

True content of the page.

Each page object has a revisions field that is a list of PageRev, ordered by date. my_page.revisions.last() gives the PageRev object that is the most up-to-date, and thus, is the real content of the page. The content is in PageRev.title and PageRev.content .

Notification

Bases: Model

Gift

Bases: Model

OperationLog

Bases: Model

General purpose log object to register operations.

validate_promo(value)

Source code in core/models.py

def validate_promo(value: int) -> None:
    start_year = settings.SITH_SCHOOL_START_YEAR
    delta = (localdate() + timedelta(days=180)).year - start_year
    if value < 0 or delta < value:
        raise ValidationError(
            _("%(value)s is not a valid promo (between 0 and %(end)s)"),
            params={"value": value, "end": delta},
        )

get_group(*, pk=None, name=None)

Search for a group by its primary key or its name. Either one of the two must be set.

The result is cached for the default duration (should be 5 minutes).

Parameters:

Name	Type	Description	Default
pk	int | None	The primary key of the group	None
name	str | None	The name of the group	None

Returns:

Type	Description
Group | None	The group if it exists, else None

Raises:

Type	Description
ValueError	If no group matches the criteria

Source code in core/models.py

def get_group(*, pk: int | None = None, name: str | None = None) -> Group | None:
    """Search for a group by its primary key or its name.
    Either one of the two must be set.

    The result is cached for the default duration (should be 5 minutes).

    Args:
        pk: The primary key of the group
        name: The name of the group

    Returns:
        The group if it exists, else None

    Raises:
        ValueError: If no group matches the criteria
    """
    if pk is None and name is None:
        raise ValueError("Either pk or name must be set")

    # replace space characters to hide warnings with memcached backend
    pk_or_name: str | int = pk if pk is not None else name.replace(" ", "_")
    group = cache.get(f"sith_group_{pk_or_name}")

    if group == "not_found":
        # Using None as a cache value is a little bit tricky,
        # so we use a special string to represent None
        return None
    elif group is not None:
        return group
    # if this point is reached, the group is not in cache
    if pk is not None:
        group = Group.objects.filter(pk=pk).first()
    else:
        group = Group.objects.filter(name=name).first()
    if group is not None:
        name = group.name.replace(" ", "_")
        cache.set_many({f"sith_group_{group.id}": group, f"sith_group_{name}": group})
    else:
        cache.set(f"sith_group_{pk_or_name}", "not_found")
    return group

get_directory(instance, filename)

Source code in core/models.py

def get_directory(instance, filename):
    return ".{0}/{1}".format(instance.get_parent_path(), filename)

get_compressed_directory(instance, filename)

Source code in core/models.py

def get_compressed_directory(instance, filename):
    return "./.compressed/{0}/{1}".format(instance.get_parent_path(), filename)

get_thumbnail_directory(instance, filename)

Source code in core/models.py

def get_thumbnail_directory(instance, filename):
    return "./.thumbnails/{0}/{1}".format(instance.get_parent_path(), filename)

get_default_owner_group()

Source code in core/models.py

def get_default_owner_group():
    return settings.SITH_GROUP_ROOT_ID