from typing import Optional

import databases
import sqlalchemy

import ormar
from tests.settings import DATABASE_URL

database = databases.Database(DATABASE_URL)
metadata = sqlalchemy.MetaData()


class BaseMeta(ormar.ModelMeta):
    metadata = metadata
    database = database


class Author(ormar.Model):
    class Meta(BaseMeta):
        tablename = "authors"
        order_by = ["-name"]

    id: int = ormar.Integer(primary_key=True)
    name: str = ormar.String(max_length=100)


class Book(ormar.Model):
    class Meta(BaseMeta):
        tablename = "books"
        order_by = ["year", "-ranking"]

    id: int = ormar.Integer(primary_key=True)
    author: Optional[Author] = ormar.ForeignKey(Author)
    title: str = ormar.String(max_length=100)
    year: int = ormar.Integer(nullable=True)
    ranking: int = ormar.Integer(nullable=True)