how do you make "get_item" search query using string ? #380

@router.get("/search/{search}", response_model=List[schemas.HouseItem])
def search_houseitem_open(
    db: Session = Depends(deps.get_db),
    q: Optional[str] = None,
    skip: int = 0,    
    limit: int = 100,
) -> Any:
    """
    search houseitems.
    """
    houseitems = crud.houseitem.get_multi_by_search(
            db=db, q = q , skip=skip, limit=limit
        )
    
    return houseitems

def get_multi_by_search(
        self, db: Session, *,  q : Optional[str] = None , skip: int = 0, limit: int = 100
    ) -> List[ModelType]:
        return (
            db.query(self.model)
            .filter()  #what filter should i use
            .offset(skip)
            .limit(limit)
            .all()
        )