Python graphene 模块，Node() 实例源码

def setup_fixtures():
    class ReporterType(PynamoObjectType):
        class Meta:
            model = Reporter
            interfaces = (Node,)

    class ArticleType(PynamoObjectType):
        class Meta:
            model = Article
            interfaces = (Node,)

    reporter1 = Reporter(1, first_name="John", last_name="Snow")
    article1 = Article(1, headline="Hi!", reporter=reporter1)
    article2 = Article(2, headline="Lame Article", reporter=reporter1)
    reporter1.articles = [article1, article2]

    return {
        'ReporterType': ReporterType,
        'ArticleType': ArticleType,
        'reporter1': reporter1,
        'article1': article1,
        'article2': article2
    }

def test_should_onetoone_convert_field():
    class A(PynamoObjectType):
        class Meta:
            model = Article
            interfaces = (Node,)

    dynamic_field = convert_pynamo_attribute(Reporter.favorite_article, Reporter.favorite_article, A._meta.registry)
    assert isinstance(dynamic_field, Dynamic)
    graphene_type = dynamic_field.get_type()
    assert isinstance(graphene_type, graphene.Field)
    assert graphene_type.type == A

def test_should_onetomany_convert_field():
    class A(PynamoObjectType):
        class Meta:
            model = Article
            interfaces = (Node,)

    dynamic_field = convert_pynamo_attribute(Reporter.articles, Reporter.articles, A._meta.registry)
    assert isinstance(dynamic_field, Dynamic)
    graphene_type = dynamic_field.get_type()
    assert isinstance(graphene_type, PynamoConnectionField)