U
    ü‚ºe†  ã                   @   sL   d dl Z d dlmZ dd„ Zdd„ Zdd„ Ze jd	d
„ ƒZG dd„ dƒZdS )é    N)Ú
namedtuplec              	   C   s†   z\t | tƒr| }n6t | tƒr8|  d¡\}}|| ¡ f}n| jj| jjf}t|ƒdksXt	‚|W S  t
t	fk
r€   t
d|  ƒ‚Y nX dS )zã
    Take a model or a string of the form "app_label.ModelName" and return a
    corresponding ("app_label", "modelname") tuple. If a tuple is passed in,
    assume it's a valid model tuple already and return it unchanged.
    Ú.é   z`Invalid model reference '%s'. String model references must be of the form 'app_label.ModelName'.N)Ú
isinstanceÚtupleÚstrÚsplitÚlowerZ_metaÚ	app_labelÚ
model_nameÚlenÚAssertionErrorÚ
ValueError)ÚmodelZmodel_tupler
   r   © r   ú:/tmp/pip-unpacked-wheel-lctamlir/django/db/models/utils.pyÚmake_model_tuple   s    

ÿÿr   c                 c   s.   |   ¡ D ] \}}|t|ƒr |ƒ n|fV  qdS )zp
    Generate key/value pairs for the given mapping where the values are
    evaluated if they're callable.
    N)ÚitemsÚcallable)ÚmappingÚkÚvr   r   r   Úresolve_callables   s    r   c                 C   s   t | Ž |Ž S ©N)Úcreate_namedtuple_class)ÚnamesÚvaluesr   r   r   Úunpickle_named_row%   s    r   c                     s&   ‡ fdd„}t dtdˆ ƒf|ddœƒS )Nc                    s   t ˆ t| ƒffS r   )r   r   )Úself©r   r   r   Ú
__reduce__-   s    z+create_namedtuple_class.<locals>.__reduce__ZRowr   )r    Ú	__slots__)Útyper   )r   r    r   r   r   r   )   s    
ýr   c                       s    e Zd ZdZ‡ fdd„Z‡  ZS )Ú
AltersDatazS
    Make subclasses preserve the alters_data attribute on overridden methods.
    c                    sl   t | ƒ ¡ D ]L\}}t|ƒrt|dƒs| jD ]*}t||d ƒ }r,t|dƒrR|j|_ qq,qtƒ jf |Ž d S )NÚalters_data)	Úvarsr   r   ÚhasattrÚ	__bases__Úgetattrr$   ÚsuperÚ__init_subclass__)ÚclsÚkwargsÚfn_nameÚfnÚbaseZbase_fn©Ú	__class__r   r   r*   <   s    

zAltersData.__init_subclass__)Ú__name__Ú
__module__Ú__qualname__Ú__doc__r*   Ú__classcell__r   r   r0   r   r#   7   s   r#   )	Ú	functoolsÚcollectionsr   r   r   r   Ú	lru_cacher   r#   r   r   r   r   Ú<module>   s   	
