| | from inspect import isclass |
| |
|
| | from .props import props |
| |
|
| |
|
| | class SubclassWithMeta_Meta(type): |
| | _meta = None |
| |
|
| | def __str__(cls): |
| | if cls._meta: |
| | return cls._meta.name |
| | return cls.__name__ |
| |
|
| | def __repr__(cls): |
| | return f"<{cls.__name__} meta={repr(cls._meta)}>" |
| |
|
| |
|
| | class SubclassWithMeta(metaclass=SubclassWithMeta_Meta): |
| | """This class improves __init_subclass__ to receive automatically the options from meta""" |
| |
|
| | def __init_subclass__(cls, **meta_options): |
| | """This method just terminates the super() chain""" |
| | _Meta = getattr(cls, "Meta", None) |
| | _meta_props = {} |
| | if _Meta: |
| | if isinstance(_Meta, dict): |
| | _meta_props = _Meta |
| | elif isclass(_Meta): |
| | _meta_props = props(_Meta) |
| | else: |
| | raise Exception( |
| | f"Meta have to be either a class or a dict. Received {_Meta}" |
| | ) |
| | delattr(cls, "Meta") |
| | options = dict(meta_options, **_meta_props) |
| |
|
| | abstract = options.pop("abstract", False) |
| | if abstract: |
| | assert not options, ( |
| | "Abstract types can only contain the abstract attribute. " |
| | f"Received: abstract, {', '.join(options)}" |
| | ) |
| | else: |
| | super_class = super(cls, cls) |
| | if hasattr(super_class, "__init_subclass_with_meta__"): |
| | super_class.__init_subclass_with_meta__(**options) |
| |
|
| | @classmethod |
| | def __init_subclass_with_meta__(cls, **meta_options): |
| | """This method just terminates the super() chain""" |
| |
|
