system-pri/backend/app/students/models.py

51 lines
2.1 KiB
Python

from sqlalchemy.sql import text
from flask_sqlalchemy import BaseQuery
from ..dependencies import db
from ..base.models import Person, Base
from ..base.utils import order_by_column_name
class ProjectSupervisor(Base, Person):
__tablename__ = "project_supervisors"
limit_group = db.Column(db.Integer, default=1, nullable=False)
mode = db.Column(db.Boolean, default=True, nullable=False) # True - stationary, False - non-stationary
class Group(Base):
__tablename__ = "groups"
name = db.Column(db.String(60), nullable=False)
project_supervisor_id = db.Column(db.Integer, db.ForeignKey('project_supervisors.id'))
project_supervisor = db.relationship('ProjectSupervisor', backref='groups', lazy=True)
class Student(Person):
__tablename__ = "students"
index = db.Column(db.Integer, primary_key=True)
first_term = db.Column(db.Integer, default=0, nullable=False)
second_term = db.Column(db.Integer, default=0, nullable=False)
group_id = db.Column(db.Integer, db.ForeignKey('groups.id'))
group = db.relationship('Group', backref='students', lazy=True)
mode = db.Column(db.Boolean, default=True, nullable=False) # True - stationary, False - non-stationary
@classmethod
def search_by_fullname_and_order_by_first_name_or_last_name(cls, fullname: str = None,
order_by_first_name: str = None,
order_by_last_name: str = None) -> BaseQuery:
student_query = cls.query
if fullname is not None:
"""This works only for sqlite3 database - concat function doesn't exist so i used builtin concat
operator specific only for sqlite db - || """
student_query = student_query.filter(
text("students_first_name || ' ' || students_last_name LIKE :fullname ")
).params(fullname=f'{fullname}%')
student_query = order_by_column_name(student_query, Student.first_name, order_by_first_name)
student_query = order_by_column_name(student_query, Student.last_name, order_by_last_name)
return student_query