266 lines
10 KiB
Python
266 lines
10 KiB
Python
# -*- coding: UTF-8 -*
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##############################################################################
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# ScoDoc
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# Copyright (c) 1999 - 2023 Emmanuel Viennet. All rights reserved.
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# See LICENSE
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##############################################################################
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"""ScoDoc models: Groups & partitions
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"""
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from operator import attrgetter
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from sqlalchemy.exc import IntegrityError
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from app import db, log
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from app.models import SHORT_STR_LEN
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from app.models import GROUPNAME_STR_LEN
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from app.scodoc import sco_utils as scu
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from app.scodoc.sco_exceptions import AccessDenied, ScoValueError
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class Partition(db.Model):
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"""Partition: découpage d'une promotion en groupes"""
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__table_args__ = (db.UniqueConstraint("formsemestre_id", "partition_name"),)
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id = db.Column(db.Integer, primary_key=True)
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partition_id = db.synonym("id")
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formsemestre_id = db.Column(
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db.Integer,
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db.ForeignKey("notes_formsemestre.id"),
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index=True,
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)
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# "TD", "TP", ... (NULL for 'all')
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partition_name = db.Column(db.String(SHORT_STR_LEN))
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# Numero = ordre de presentation)
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numero = db.Column(db.Integer, nullable=False, default=0)
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# Calculer le rang ?
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bul_show_rank = db.Column(
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db.Boolean(), nullable=False, default=False, server_default="false"
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)
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# Montrer quand on indique les groupes de l'étudiant ?
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show_in_lists = db.Column(
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db.Boolean(), nullable=False, default=True, server_default="true"
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)
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# Editable (créer/renommer groupes) ? (faux pour les groupes de parcours)
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groups_editable = db.Column(
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db.Boolean(), nullable=False, default=True, server_default="true"
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)
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groups = db.relationship(
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"GroupDescr",
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backref=db.backref("partition", lazy=True),
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lazy="dynamic",
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cascade="all, delete-orphan",
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order_by="GroupDescr.numero",
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)
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def __init__(self, **kwargs):
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super(Partition, self).__init__(**kwargs)
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if self.numero is None:
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# génère numero à la création
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last_partition = Partition.query.order_by(Partition.numero.desc()).first()
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if last_partition:
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self.numero = last_partition.numero + 1
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else:
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self.numero = 1
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def __repr__(self):
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return f"""<{self.__class__.__name__} {self.id} "{self.partition_name or '(default)'}">"""
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@classmethod
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def check_name(
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cls, formsemestre: "FormSemestre", partition_name: str, existing=False
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) -> bool:
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"""check if a partition named 'partition_name' can be created in the given formsemestre.
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If existing is True, allow a partition_name already existing in the formsemestre.
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"""
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if not isinstance(partition_name, str):
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return False
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if not (0 < len(partition_name.strip()) < SHORT_STR_LEN):
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return False
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if (not existing) and (
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partition_name in [p.partition_name for p in formsemestre.partitions]
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):
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return False
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return True
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def is_parcours(self) -> bool:
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"Vrai s'il s'agit de la partition de parcours"
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return self.partition_name == scu.PARTITION_PARCOURS
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def to_dict(self, with_groups=False, str_keys: bool = False) -> dict:
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"""as a dict, with or without groups.
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If str_keys, convert integer dict keys to strings (useful for JSON)
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"""
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d = dict(self.__dict__)
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d["partition_id"] = self.id
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d.pop("_sa_instance_state", None)
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d.pop("formsemestre", None)
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if with_groups:
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groups = sorted(self.groups, key=attrgetter("numero", "group_name"))
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# un dict et non plus une liste, pour JSON
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if str_keys:
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d["groups"] = {
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str(group.id): group.to_dict(with_partition=False)
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for group in groups
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}
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else:
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d["groups"] = {
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group.id: group.to_dict(with_partition=False) for group in groups
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}
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return d
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def get_etud_group(self, etudid: int) -> "GroupDescr":
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"Le groupe de l'étudiant dans cette partition, ou None si pas présent"
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return (
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GroupDescr.query.filter_by(partition_id=self.id)
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.join(group_membership)
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.filter_by(etudid=etudid)
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.first()
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)
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def set_etud_group(self, etud: "Identite", group: "GroupDescr") -> bool:
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"""Affect etudid to group_id in given partition.
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Raises IntegrityError si conflit,
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or ValueError si ce group_id n'est pas dans cette partition
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ou que l'étudiant n'est pas inscrit au semestre.
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Return True si changement, False s'il était déjà dans ce groupe.
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"""
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if not group.id in (g.id for g in self.groups):
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raise ScoValueError(
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f"""Le groupe {group.id} n'est pas dans la partition {
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self.partition_name or "tous"}"""
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)
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if etud.id not in (e.id for e in self.formsemestre.etuds):
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raise ScoValueError(
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f"""étudiant {etud.nomprenom} non inscrit au formsemestre du groupe {
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group.group_name}"""
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)
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try:
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existing_row = (
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db.session.query(group_membership)
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.filter_by(etudid=etud.id)
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.join(GroupDescr)
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.filter_by(partition_id=self.id)
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.first()
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)
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if existing_row:
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existing_group_id = existing_row[1]
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if group.id == existing_group_id:
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return False
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# Fait le changement avec l'ORM sinon risque élevé de blocage
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existing_group = db.session.get(GroupDescr, existing_group_id)
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db.session.commit()
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group.etuds.append(etud)
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existing_group.etuds.remove(etud)
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db.session.add(etud)
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db.session.add(existing_group)
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db.session.add(group)
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else:
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new_row = group_membership.insert().values(
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etudid=etud.id, group_id=group.id
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)
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db.session.execute(new_row)
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db.session.commit()
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except IntegrityError:
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db.session.rollback()
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raise
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return True
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def create_group(self, group_name="", default=False) -> "GroupDescr":
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"Crée un groupe dans cette partition"
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if not self.formsemestre.can_change_groups():
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raise AccessDenied(
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"""Vous n'avez pas le droit d'effectuer cette opération,
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ou bien le semestre est verrouillé !"""
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)
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if group_name:
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group_name = group_name.strip()
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if not group_name and not default:
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raise ValueError("invalid group name: ()")
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if not GroupDescr.check_name(self, group_name, default=default):
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raise ScoValueError(
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f"Le groupe {group_name} existe déjà dans cette partition"
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)
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numeros = [g.numero if g.numero is not None else 0 for g in self.groups]
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if len(numeros) > 0:
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new_numero = max(numeros) + 1
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else:
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new_numero = 0
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group = GroupDescr(partition=self, group_name=group_name, numero=new_numero)
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db.session.add(group)
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db.session.commit()
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log(f"create_group: created group_id={group.id}")
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#
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return group
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class GroupDescr(db.Model):
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"""Description d'un groupe d'une partition"""
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__tablename__ = "group_descr"
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__table_args__ = (db.UniqueConstraint("partition_id", "group_name"),)
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id = db.Column(db.Integer, primary_key=True)
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group_id = db.synonym("id")
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partition_id = db.Column(db.Integer, db.ForeignKey("partition.id"))
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# "A", "C2", ... (NULL for 'all'):
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group_name = db.Column(db.String(GROUPNAME_STR_LEN))
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# Numero = ordre de presentation
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numero = db.Column(db.Integer, nullable=False, default=0)
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etuds = db.relationship(
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"Identite",
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secondary="group_membership",
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lazy="dynamic",
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)
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def __repr__(self):
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return (
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f"""<{self.__class__.__name__} {self.id} "{self.group_name or '(tous)'}">"""
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)
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def get_nom_with_part(self) -> str:
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"Nom avec partition: 'TD A'"
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return f"{self.partition.partition_name or ''} {self.group_name or '-'}"
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def to_dict(self, with_partition=True) -> dict:
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"""as a dict, with or without partition"""
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d = dict(self.__dict__)
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d.pop("_sa_instance_state", None)
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if with_partition:
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d["partition"] = self.partition.to_dict(with_groups=False)
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return d
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@classmethod
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def check_name(
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cls, partition: "Partition", group_name: str, existing=False, default=False
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) -> bool:
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"""check if a group named 'group_name' can be created in the given partition.
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If existing is True, allow a group_name already existing in the partition.
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If default, name must be empty and default group must not yet exists.
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"""
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if not isinstance(group_name, str):
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return False
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if not default and not (0 < len(group_name.strip()) < GROUPNAME_STR_LEN):
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return False
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if (not existing) and (group_name in [g.group_name for g in partition.groups]):
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return False
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return True
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group_membership = db.Table(
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"group_membership",
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db.Column("etudid", db.Integer, db.ForeignKey("identite.id", ondelete="CASCADE")),
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db.Column("group_id", db.Integer, db.ForeignKey("group_descr.id")),
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db.UniqueConstraint("etudid", "group_id"),
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)
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# class GroupMembership(db.Model):
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# """Association groupe / étudiant"""
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# __tablename__ = "group_membership"
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# __table_args__ = (db.UniqueConstraint("etudid", "group_id"),)
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# id = db.Column(db.Integer, primary_key=True)
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# etudid = db.Column(db.Integer, db.ForeignKey("identite.id", ondelete="CASCADE"))
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# group_id = db.Column(db.Integer, db.ForeignKey("group_descr.id"))
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