U
    }®c~&  ã                   @   s,  d dl Z d dlmZ d dlmZ d dlmZ d dlmZ d dlm	Z	 d dl
mZ d dlmZ d	Zd
ZG dd„ deƒZG dd„ deƒZG dd„ deƒZG dd„ deƒZG dd„ deƒZG dd„ deƒZG dd„ deƒZG dd„ deƒZG dd„ deƒZG dd„ dƒZdd „ ZG d!d"„ d"e	ƒZG d#d$„ d$ƒZdS )%é    N)Úimport_module©Úsettings)ÚImproperlyConfigured)ÚConnectionDoesNotExist)ÚBaseConnectionHandler)Úcached_property)Úimport_stringÚdefaultZ_django_versionc                   @   s   e Zd ZdS )ÚErrorN©Ú__name__Ú
__module__Ú__qualname__© r   r   ú3/tmp/pip-unpacked-wheel-7m9rsep5/django/db/utils.pyr      s   r   c                   @   s   e Zd ZdS )ÚInterfaceErrorNr   r   r   r   r   r      s   r   c                   @   s   e Zd ZdS )ÚDatabaseErrorNr   r   r   r   r   r      s   r   c                   @   s   e Zd ZdS )Ú	DataErrorNr   r   r   r   r   r      s   r   c                   @   s   e Zd ZdS )ÚOperationalErrorNr   r   r   r   r   r       s   r   c                   @   s   e Zd ZdS )ÚIntegrityErrorNr   r   r   r   r   r   $   s   r   c                   @   s   e Zd ZdS )ÚInternalErrorNr   r   r   r   r   r   (   s   r   c                   @   s   e Zd ZdS )ÚProgrammingErrorNr   r   r   r   r   r   ,   s   r   c                   @   s   e Zd ZdS )ÚNotSupportedErrorNr   r   r   r   r   r   0   s   r   c                   @   s0   e Zd ZdZdd„ Zdd„ Zdd„ Zdd	„ Zd
S )ÚDatabaseErrorWrapperz~
    Context manager and decorator that reraises backend-specific database
    exceptions using Django's common wrappers.
    c                 C   s
   || _ dS )zx
        wrapper is a database wrapper.

        It must have a Database attribute defining PEP-249 exceptions.
        N)Úwrapper)Úselfr   r   r   r   Ú__init__:   s    zDatabaseErrorWrapper.__init__c                 C   s   d S ©Nr   ©r   r   r   r   Ú	__enter__B   s    zDatabaseErrorWrapper.__enter__c              	   C   sp   |d krd S t ttttttttf	D ]H}t	| j
j|jƒ}t||ƒr"||jŽ }|t tfkr^d| j
_| |¡|‚q"d S ©NT)r   r   r   r   r   r   r   r   r   Úgetattrr   ZDatabaser   Ú
issubclassÚargsZerrors_occurredÚwith_traceback)r   Úexc_typeÚ	exc_valueÚ	tracebackZdj_exc_typeZdb_exc_typeZdj_exc_valuer   r   r   Ú__exit__E   s$    ÷

zDatabaseErrorWrapper.__exit__c                    s   ‡ ‡fdd„}|S )Nc               
      s&   ˆ� ˆ | |ŽW  5 Q R £ S Q R X d S r   r   )r$   Úkwargs©Úfuncr   r   r   Úinner_   s    z,DatabaseErrorWrapper.__call__.<locals>.innerr   )r   r,   r-   r   r+   r   Ú__call__\   s    zDatabaseErrorWrapper.__call__N)r   r   r   Ú__doc__r   r    r)   r.   r   r   r   r   r   4   s
   r   c              
   C   s    | dkrd} zt d|  ƒW S  tk
rš } zbddl}dd„ t |jjj¡D ƒ}| dd„ |D ƒkrˆtt	t
|ƒƒ}td	| d
 |¡f ƒ|‚n‚ W 5 d}~X Y nX dS )z�
    Return a database backend's "base" module given a fully qualified database
    backend name, or raise an error if it doesn't exist.
    z&django.db.backends.postgresql_psycopg2zdjango.db.backends.postgresqlz%s.baser   Nc                 S   s"   g | ]\}}}|r|d kr|‘qS )>   ÚbaseÚdummyr   )Ú.0Ú_ÚnameÚispkgr   r   r   Ú
<listcomp>t   s    ÿz load_backend.<locals>.<listcomp>c                 S   s   g | ]}d | ‘qS )zdjango.db.backends.%sr   )r2   Úbr   r   r   r6   x   s     z¹%r isn't an available database backend or couldn't be imported. Check the above exception. To use one of the built-in backends, use 'django.db.backends.XXX', where XXX is one of:
    %sz, )r   ÚImportErrorZdjango.db.backendsÚpkgutilÚiter_modulesÚdbÚbackendsÚ__path__ÚmapÚreprÚsortedr   Újoin)Úbackend_nameZe_userZdjangoZbuiltin_backendsZbackend_reprsr   r   r   Úload_backende   s&    ÿüÿú	rC   c                       sP   e Zd ZdZdZ‡ fdd„Zedd„ ƒZdd„ Zd	d
„ Z	dd„ Z
dd„ Z‡  ZS )ÚConnectionHandlerZ	DATABASESTc                    sX   t ƒ  |¡}|i kr"ddi|t< n2t|kr<tdt› d�ƒ‚n|t i krTd|t d< |S )NÚENGINEúdjango.db.backends.dummyzYou must define a 'z' database.)ÚsuperÚconfigure_settingsÚDEFAULT_DB_ALIASr   )r   Ú	databases©Ú	__class__r   r   rH   �   s    
ÿz$ConnectionHandler.configure_settingsc                 C   s   | j S r   r   r   r   r   r   rJ   ›   s    zConnectionHandler.databasesc                 C   s´   z| j | }W n& tk
r4   |  d|› d�¡‚Y nX | dd¡ | dd¡ | dd¡ |d d	ksn|d svd|d< | d
d¡ | di ¡ | dd¡ dD ]}| |d¡ qždS )z}
        Put the defaults into the settings dictionary for a given connection
        where no settings is provided.
        úThe connection 'ú' doesn't exist.ZATOMIC_REQUESTSFZ
AUTOCOMMITTrE   rF   zdjango.db.backends.ZCONN_MAX_AGEr   ÚOPTIONSZ	TIME_ZONEN)ÚNAMEÚUSERZPASSWORDZHOSTZPORTÚ ©rJ   ÚKeyErrorZexception_classÚ
setdefault)r   ÚaliasÚconnZsettingr   r   r   Úensure_defaultsŸ   s    z!ConnectionHandler.ensure_defaultsc                 C   sn   z| j | }W n& tk
r4   |  d|› d�¡‚Y nX | di ¡}dddddg}|D ]\}}| ||¡ qTd	S )
zY
        Make sure the test settings are available in the 'TEST' sub-dictionary.
        rM   rN   ZTEST)ÚCHARSETN)Z	COLLATIONN)ZMIGRATET)ZMIRRORN)rP   NNrS   )r   rV   rW   Ztest_settingsZdefault_test_settingsÚkeyÚvaluer   r   r   Úprepare_test_settings´   s    ûz'ConnectionHandler.prepare_test_settingsc                 C   s6   |   |¡ |  |¡ | j| }t|d ƒ}| ||¡S )NrE   )rX   r\   rJ   rC   ZDatabaseWrapper)r   rV   r;   Úbackendr   r   r   Úcreate_connectionÈ   s
    


z#ConnectionHandler.create_connectionc              	   C   s@   | D ]6}zt | j|ƒ}W n tk
r0   Y qY nX | ¡  qd S r   )r"   Z_connectionsÚAttributeErrorÚclose)r   rV   Ú
connectionr   r   r   Ú	close_allÏ   s    
zConnectionHandler.close_all)r   r   r   Zsettings_nameZthread_criticalrH   ÚpropertyrJ   rX   r\   r^   rb   Ú__classcell__r   r   rK   r   rD   †   s   
rD   c                   @   s\   e Zd Zddd„Zedd„ ƒZdd„ ZedƒZed	ƒZd
d„ Z	dd„ Z
dd„ Zddd„ZdS )ÚConnectionRouterNc                 C   s
   || _ dS )zT
        If routers is not specified, default to settings.DATABASE_ROUTERS.
        N)Ú_routers)r   Úroutersr   r   r   r   Ù   s    zConnectionRouter.__init__c                 C   sJ   | j d krtj| _ g }| j D ](}t|tƒr6t|ƒƒ }n|}| |¡ q|S r   )rf   r   ZDATABASE_ROUTERSÚ
isinstanceÚstrr	   Úappend)r   rg   ÚrÚrouterr   r   r   rg   ß   s    


zConnectionRouter.routersc                    s   ‡ fdd„}|S )Nc              	      sr   d }| j D ]@}zt|ˆ ƒ}W n tk
r0   Y q
X ||f|Ž}|r
|  S q
| d¡}|d k	rn|jjrn|jjS tS )NÚinstance)rg   r"   r_   ÚgetÚ_stater;   rI   )r   ÚmodelÚhintsZ	chosen_dbrl   Úmethodrm   ©Úactionr   r   Ú	_route_dbí   s    


z0ConnectionRouter._router_func.<locals>._route_dbr   )rt   ru   r   rs   r   Ú_router_funcì   s    zConnectionRouter._router_funcÚdb_for_readÚdb_for_writec              	   K   sZ   | j D ]B}z
|j}W n tk
r(   Y qX |||f|Ž}|d k	r|  S q|jj|jjkS r   )rg   Úallow_relationr_   ro   r;   )r   Zobj1Úobj2rq   rl   rr   Úallowr   r   r   ry     s    


zConnectionRouter.allow_relationc              	   K   sR   | j D ]F}z
|j}W n tk
r,   Y qY nX |||f|Ž}|d k	r|  S qdS r!   )rg   Úallow_migrater_   )r   r;   Ú	app_labelrq   rl   rr   r{   r   r   r   r|     s    



zConnectionRouter.allow_migratec                 C   s   | j ||jj|jj|d�S )N)Ú
model_namerp   )r|   Z_metar}   r~   )r   r;   rp   r   r   r   Úallow_migrate_model  s    üz$ConnectionRouter.allow_migrate_modelFc                    s    |j |d�}‡ ‡fdd„|D ƒS )z8Return app models allowed to be migrated on provided db.)Úinclude_auto_createdc                    s   g | ]}ˆ  ˆ |¡r|‘qS r   )r   )r2   rp   ©r;   r   r   r   r6   (  s      z:ConnectionRouter.get_migratable_models.<locals>.<listcomp>)Z
get_models)r   Z
app_configr;   r€   Úmodelsr   r�   r   Úget_migratable_models%  s    z&ConnectionRouter.get_migratable_models)N)F)r   r   r   r   r   rg   rv   rw   rx   ry   r|   r   rƒ   r   r   r   r   re   Ø   s   

re   )r9   Ú	importlibr   Zdjango.confr   Zdjango.core.exceptionsr   Zdjango.utils.connectionr   r   Zdjango.utils.functionalr   Zdjango.utils.module_loadingr	   rI   ZDJANGO_VERSION_PICKLE_KEYÚ	Exceptionr   r   r   r   r   r   r   r   r   r   rC   rD   re   r   r   r   r   Ú<module>   s,   1!R