PaperParser/app/models/user.py

from sqlalchemy import Integer
from sqlalchemy.schema import (
    Column,
    ForeignKey,
)
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.extensions import db

class User(db.Model):
    id: Mapped[int] = mapped_column(primary_key=True)
    first_name: Mapped[str] = mapped_column(nullable=True)
    last_name: Mapped[str] = mapped_column(nullable=True)

    phone: Mapped[str] = mapped_column(nullable=True)
    username: Mapped[str] = mapped_column(nullable=True)
    
    collection_id = Column(Integer, ForeignKey("collection.id"))
    collection: Mapped["Collection"] = relationship("Collection", back_populates="users")
    
    def exist(username: str, collection):
        return not User.query.filter_by(username=username, collection=collection).first() is None