__init__.py 文件源码

def document_to_item(document_class):
    class DocumentAsItemClass(Item):
        def concrete(self):
            return document_class(**self)
    exclude_fields = dir(EmptyDocument)
    document_fields = [field for field in dir(document_class) if field not in exclude_fields]

    for field in document_fields + ['id']:
        DocumentAsItemClass.fields[field] = Field()

    return DocumentAsItemClass