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from typing import List, Optional, Tuple
from polyfactory.factories.pydantic_factory import ModelFactory
from pydantic import BaseModel
from litestar import Litestar, get
from litestar.pagination import AbstractSyncCursorPaginator, CursorPagination
class Person(BaseModel):
id: str
name: str
class PersonFactory(ModelFactory[Person]):
__model__ = Person
# we will implement a paginator - the paginator must implement the method 'get_items'.
class PersonCursorPaginator(AbstractSyncCursorPaginator[str, Person]):
def __init__(self) -> None:
self.data = PersonFactory.batch(50)
def get_items(self, cursor: Optional[str], results_per_page: int) -> Tuple[List[Person], Optional[str]]:
results = self.data[:results_per_page]
return results, results[-1].id
paginator = PersonCursorPaginator()
# we now create a regular handler. The handler will receive a single query parameter - 'cursor', which
# we will pass to the paginator.
@get("/people", sync_to_thread=False)
def people_handler(cursor: Optional[str], results_per_page: int) -> CursorPagination[str, Person]:
return paginator(cursor=cursor, results_per_page=results_per_page)
app = Litestar(route_handlers=[people_handler])
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