sqlalchemy dynamic filtering

Question

I\'m trying to implement dynamic filtering using SQLAlchemy ORM.

I was looking through StackOverflow and found very similar question:SQLALchemy dynamic filter_by

Answer 1

For the people using FastAPI and SQLAlchemy, here is a example of dynamic filtering:

api/app/app/crud/order.py

from typing import Optional

from pydantic import UUID4
from sqlalchemy.orm import Session

from app.crud.base import CRUDBase
from app.models.order import Order
from app.schemas.order import OrderCreate, OrderUpdate


class CRUDOrder(CRUDBase[Order, OrderCreate, OrderUpdate]):

    def get_orders(
        self,
        db: Session,
        owner_id: UUID4,
        status: str,
        trading_type: str,
        pair: str,
        skip: int = 0,
        limit: int = 100,
    ) -> Optional[Order]:
        filters = {
            arg: value
            for arg, value in locals().items()
            if arg != "self" and arg != "db" and arg != "skip" and arg != "limit" and value is not None
        }
        query = db.query(self.model)
        for attr, value in filters.items():
            query = query.filter(getattr(self.model, attr) == value)
        return (
            query
            .offset(skip)
            .limit(limit)
            .all()
        )


order = CRUDOrder(Order)