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AdvLabDB/advlabdb/model_dependent_funs.py

69 lines
2 KiB
Python

# Functions dependent on advlabdb.models
from flask import flash, url_for
from flask_admin.menu import MenuLink
from flask_security import current_user
from sqlalchemy import select
from . import app, db
from .models import Semester
def sortedSemestersStartingWithNewest(limit=0):
# Inserting an older semester is not allowed!
# Therefore, the id is enough.
stmt = select(Semester).order_by(Semester.id.desc())
if limit > 0:
stmt = stmt.limit(limit)
return db.session.execute(stmt).scalars()
def lastSemester():
return sortedSemestersStartingWithNewest(limit=1).first()
def setUserActiveSemester(semester):
if semester is None:
flash(f"Can not change the active semester to None!", "error")
return
if current_user.active_semester != semester:
try:
current_user.active_semester = semester
db.session.commit()
except Exception as ex:
flash(str(ex), "error")
db.session.rollback()
else:
flash(f"Active semester changed to {semester.repr()}!", "warning")
def initActiveSemesterMenuLinks(space):
with app.app_context():
try:
semesters = sortedSemestersStartingWithNewest()
for semester in semesters:
space.add_link(
MenuLink(
name=semester.repr(),
url=url_for("set_semester") + "?semester_id=" + str(semester.id),
category="Active semester",
)
)
except Exception as ex:
print(
"ERROR: The Semester table does not exist yet! Therefore, menu links could not be generated. You can ignore this error if you are just initializing the database."
)
else:
space.add_link(MenuLink(name="Logout", url=url_for("security.logout")))
def reportBadAttempt(message):
print("BAD ATTEMPT:", message) # TODO: Log
def get_count(table):
return db.session.scalar(select(func.count()).select_from(table))