3
g~&                 @   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ZG dd deZG dd deZG dd deZG dd deZG dd deZG dd deZG dd deZG dd deZG dd dZdd  ZG d!d" d"e	ZG d#d$ d$ZdS )%    N)import_module)settings)ImproperlyConfigured)ConnectionDoesNotExist)BaseConnectionHandler)cached_property)import_stringdefaultZ_django_versionc               @   s   e Zd ZdS )ErrorN)__name__
__module____qualname__ r   r   M/var/www/tester-filtro-web/env/lib/python3.6/site-packages/django/db/utils.pyr
      s   r
   c               @   s   e Zd ZdS )InterfaceErrorN)r   r   r   r   r   r   r   r      s   r   c               @   s   e Zd ZdS )DatabaseErrorN)r   r   r   r   r   r   r   r      s   r   c               @   s   e Zd ZdS )	DataErrorN)r   r   r   r   r   r   r   r      s   r   c               @   s   e Zd ZdS )OperationalErrorN)r   r   r   r   r   r   r   r       s   r   c               @   s   e Zd ZdS )IntegrityErrorN)r   r   r   r   r   r   r   r   $   s   r   c               @   s   e Zd ZdS )InternalErrorN)r   r   r   r   r   r   r   r   (   s   r   c               @   s   e Zd ZdS )ProgrammingErrorN)r   r   r   r   r   r   r   r   ,   s   r   c               @   s   e Zd ZdS )NotSupportedErrorN)r   r   r   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 )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)wrapper)selfr   r   r   r   __init__:   s    zDatabaseErrorWrapper.__init__c             C   s   d S )Nr   )r   r   r   r   	__enter__B   s    zDatabaseErrorWrapper.__enter__c          	   C   st   |d krd S xbt ttttttttf	D ]H}t	| j
j|j}t||r$||j }|t tfkr`d| j
_|j||q$W d S )NT)r   r   r   r   r   r   r   r   r
   getattrr   ZDatabaser   
issubclassargsZerrors_occurredwith_traceback)r   exc_type	exc_value	tracebackZdj_exc_typeZdb_exc_typeZdj_exc_valuer   r   r   __exit__E   s$    


zDatabaseErrorWrapper.__exit__c                s    fdd}|S )Nc           
      s     | |S Q R X d S )Nr   )r   kwargs)funcr   r   r   inner_   s    z,DatabaseErrorWrapper.__call__.<locals>.innerr   )r   r&   r'   r   )r&   r   r   __call__\   s    zDatabaseErrorWrapper.__call__N)r   r   r   __doc__r   r   r$   r(   r   r   r   r   r   4   s
   r   c             C   s   | dkrd} yt d|  S  tk
r } zdddl}dd tj|jjjD }| dd |D krtt	t
|}td	| d
j|f |n W Y dd}~X 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 )basedummy>   r+   r*   r   ).0_nameispkgr   r   r   
<listcomp>u   s    z load_backend.<locals>.<listcomp>c             S   s   g | ]}d | qS )zdjango.db.backends.%sr   )r,   br   r   r   r0   x   s    z%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   ImportErrorZdjango.db.backendspkgutiliter_modulesdbbackends__path__mapreprsortedr   join)backend_nameZe_userZdjangoZbuiltin_backendsZbackend_reprsr   r   r   load_backende   s    r=   c                   sP   e Zd ZdZdZ fddZedd Zdd Zd	d
 Z	dd Z
dd Z  ZS )ConnectionHandlerZ	DATABASESTc                sX   t  j|}|i kr"ddi|t< n2t|kr<tdt dn|t i krTd|t d< |S )NENGINEzdjango.db.backends.dummyzYou must define a 'z' database.)superconfigure_settingsDEFAULT_DB_ALIASr   )r   	databases)	__class__r   r   rA      s    z$ConnectionHandler.configure_settingsc             C   s   | j S )N)r   )r   r   r   r   rC      s    zConnectionHandler.databasesc             C   s   y| j | }W n& tk
r4   | jd| dY nX |jdd |jdd |jdd |d d	ksp|d  rxd|d< |jd
d |jdi  |jdd xdD ]}|j|d qW dS )z}
        Put the defaults into the settings dictionary for a given connection
        where no settings is provided.
        zThe connection 'z' doesn't exist.ZATOMIC_REQUESTSFZ
AUTOCOMMITTr?   zdjango.db.backends.dummyzdjango.db.backends.ZCONN_MAX_AGEr   OPTIONSZ	TIME_ZONENNAMEUSERPASSWORDHOSTPORT )rF   rG   rH   rI   rJ   )rC   KeyErrorexception_class
setdefault)r   aliasconnZsettingr   r   r   ensure_defaults   s    
z!ConnectionHandler.ensure_defaultsc             C   sr   y| j | }W n& tk
r4   | jd| dY nX |jdi }dddddg}x|D ]\}}|j|| qVW dS )zY
        Make sure the test settings are available in the 'TEST' sub-dictionary.
        zThe connection 'z' doesn't exist.ZTESTCHARSETN	COLLATIONMIGRATETMIRRORrF   )rR   N)rS   N)rT   T)rU   N)rF   N)rC   rL   rM   rN   )r   rO   rP   Ztest_settingsZdefault_test_settingskeyvaluer   r   r   prepare_test_settings   s    z'ConnectionHandler.prepare_test_settingsc             C   s6   | j | | j| | j| }t|d }|j||S )Nr?   )rQ   rX   rC   r=   ZDatabaseWrapper)r   rO   r5   backendr   r   r   create_connection   s
    


z#ConnectionHandler.create_connectionc             C   sB   x<| D ]4}yt | j|}W n tk
r0   wY nX |j  qW d S )N)r   Z_connectionsAttributeErrorclose)r   rO   
connectionr   r   r   	close_all   s    
zConnectionHandler.close_all)r   r   r   Zsettings_nameZthread_criticalrA   propertyrC   rQ   rX   rZ   r^   __classcell__r   r   )rD   r   r>      s   r>   c               @   s\   e Zd ZdddZedd Zdd ZedZed	Zd
d Z	dd Z
dd ZdddZdS )ConnectionRouterNc             C   s
   || _ dS )zT
        If routers is not specified, default to settings.DATABASE_ROUTERS.
        N)_routers)r   routersr   r   r   r      s    zConnectionRouter.__init__c             C   sN   | j d krtj| _ g }x2| j D ](}t|tr8t| }n|}|j| qW |S )N)rb   r   ZDATABASE_ROUTERS
isinstancestrr   append)r   rc   rrouterr   r   r   rc      s    

zConnectionRouter.routersc                s    fdd}|S )Nc                sr   d }xF| j D ]<}yt| }W n tk
r2   Y qX ||f|}|r|S qW |jd}|d k	rn|jjrn|jjS tS )Ninstance)rc   r   r[   get_stater5   rB   )r   modelhintsZ	chosen_dbrh   methodri   )actionr   r   	_route_db   s    
z0ConnectionRouter._router_func.<locals>._route_dbr   )ro   rp   r   )ro   r   _router_func   s    zConnectionRouter._router_funcdb_for_readdb_for_writec             K   sZ   xH| j D ]>}y
|j}W n tk
r*   Y qX |||f|}|d k	r|S qW |jj|jjkS )N)rc   allow_relationr[   rk   r5   )r   Zobj1obj2rm   rh   rn   allowr   r   r   rt     s    
zConnectionRouter.allow_relationc             K   sP   xJ| j D ]@}y
|j}W n tk
r,   wY nX |||f|}|d k	r|S qW dS )NT)rc   allow_migrater[   )r   r5   	app_labelrm   rh   rn   rv   r   r   r   rw     s    
zConnectionRouter.allow_migratec             C   s   | j ||jj|jj|dS )N)
model_namerl   )rw   Z_metarx   ry   )r   r5   rl   r   r   r   allow_migrate_model  s
    z$ConnectionRouter.allow_migrate_modelFc                s    |j |d} fdd|D S )z8Return app models allowed to be migrated on provided db.)include_auto_createdc                s   g | ]}j  |r|qS r   )rz   )r,   rl   )r5   r   r   r   r0   (  s    z:ConnectionRouter.get_migratable_models.<locals>.<listcomp>)Z
get_models)r   Z
app_configr5   r{   modelsr   )r5   r   r   get_migratable_models%  s    z&ConnectionRouter.get_migratable_models)N)F)r   r   r   r   r   rc   rq   rr   rs   rt   rw   rz   r}   r   r   r   r   ra      s   
ra   )r3   	importlibr   Zdjango.confr   Zdjango.core.exceptionsr   Zdjango.utils.connectionr   r   Zdjango.utils.functionalr   Zdjango.utils.module_loadingr   rB   ZDJANGO_VERSION_PICKLE_KEY	Exceptionr
   r   r   r   r   r   r   r   r   r   r=   r>   ra   r   r   r   r   <module>   s,   1!R