ScoDoc-Lille/migrations/versions/054dd6133b9c_association_ues_parcours.py

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"""Association UEs <-> parcours
Revision ID: 054dd6133b9c
Revises: 6520faf67508
Create Date: 2023-03-30 19:40:50.575293
"""
from alembic import op
import sqlalchemy as sa
from sqlalchemy.orm import sessionmaker # added by ev
# revision identifiers, used by Alembic.
revision = "054dd6133b9c"
2023-05-11 16:43:44 +02:00
down_revision = "cf29790ca6f6"
branch_labels = None
depends_on = None
Session = sessionmaker()
def upgrade():
"""Passe d'une relation UE - Parcours one-to-many à une relation many-to-many
crée la table d'association, copie l'éventuelle relation existante
puis supprime la clé étrangère parcour_id
"""
op.create_table(
"ue_parcours",
sa.Column("ue_id", sa.Integer(), nullable=False),
sa.Column("parcours_id", sa.Integer(), nullable=False),
sa.Column("ects", sa.Float(), nullable=True),
sa.ForeignKeyConstraint(
["parcours_id"], ["apc_parcours.id"], ondelete="CASCADE"
),
sa.ForeignKeyConstraint(["ue_id"], ["notes_ue.id"], ondelete="CASCADE"),
sa.PrimaryKeyConstraint("ue_id", "parcours_id"),
)
#
bind = op.get_bind()
session = Session(bind=bind)
session.execute(
sa.text(
"""
INSERT INTO ue_parcours
SELECT id as ue_id, parcour_id as parcours_id
FROM notes_ue
WHERE parcour_id is not NULL;
"""
)
)
session.commit()
op.drop_column("notes_ue", "parcour_id")
# Numeros non nullables
for table in (
"apc_competence",
"apc_parcours",
"notes_form_modalites",
"notes_ue",
"notes_matieres",
"notes_modules",
"notes_evaluation",
"partition",
"group_descr",
):
session.execute(
sa.text(
f"""UPDATE {table} SET numero=0 WHERE numero is NULL;
"""
)
)
session.commit()
op.alter_column(table, "numero", existing_type=sa.INTEGER(), nullable=False)
def downgrade():
#
op.add_column(
"notes_ue",
sa.Column("parcour_id", sa.INTEGER(), autoincrement=False, nullable=True),
)
op.drop_table("ue_parcours")
for table in (
"apc_competence",
"apc_parcours",
"notes_form_modalites",
"notes_ue",
"notes_matieres",
"notes_modules",
"notes_evaluation",
"partition",
"group_descr",
):
op.alter_column(table, "numero", existing_type=sa.INTEGER(), nullable=True)