B
    CVvg39  ã               @   sŠ   d dl Z d dlZd dlmZ d dlmZ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G dd„ dƒZdS )é    N)ÚStringIO)ÚexpectedFailureÚskip)Úapps)Úsettings)Úserializers)Úrouter)Úatomic)Úimport_stringZtest_c               @   s´   e Zd ZdZdd„ Zdd„ Zdd„ Zd,dd„Zdd„ Zdd„ Z	dd„ Z
dd„ Zdd„ Zd-dd„Zd.dd„Zd/dd„Zdd„ Zd0dd „Zd1d"d#„Zd$d%„ Zd&d'„ Zd(d)„ Zd*d+„ Zd!S )2ÚBaseDatabaseCreationzs
    Encapsulate backend-specific differences pertaining to creation and
    destruction of the test database.
    c             C   s
   || _ d S )N)Ú
connection)Úselfr   © r   úD/tmp/pip-install-o3oxmrkh/Django/django/db/backends/base/creation.pyÚ__init__   s    zBaseDatabaseCreation.__init__c             C   s
   | j  ¡ S )N)r   Ú_nodb_cursor)r   r   r   r   r      s    z!BaseDatabaseCreation._nodb_cursorc             C   s   t j |tj ¡ d S )N)ÚsysÚstderrÚwriteÚosÚlinesep)r   Úmsgr   r   r   Úlog   s    zBaseDatabaseCreation.logé   FTc       	      C   s0  ddl m} |  ¡ }|dkrBd}|r(d}|  d||  ||¡f ¡ |  |||¡ | j ¡  |tj	| jj
 d< || jjd< zR| jjd d	 d
kr¨tj}dd„ t ¡ D ƒt_|dt|d dƒd
| jj
dd� W d| jjd d	 d
kræ|t_X |rø|  ¡ | j_|d| jj
d� | j ¡  tj d¡dk�r,|  ¡  |S )z£
        Create a test database, prompting the user for confirmation if the
        database already exists. Return the name of the test database created.
        r   )Úcall_commandr   ZCreatingzUsing existingz %s test database for alias %s...ÚNAMEÚTESTZMIGRATEFc             S   s   i | ]}d |j “qS )N)Úlabel)Ú.0Zappr   r   r   ú
<dictcomp>C   s   z7BaseDatabaseCreation.create_test_db.<locals>.<dictcomp>ZmigrateT)Ú	verbosityÚinteractiveÚdatabaseZ
run_syncdbNZcreatecachetable)r"   ZRUNNING_DJANGOS_TEST_SUITEÚtrue)Zdjango.core.managementr   Ú_get_test_db_namer   Ú_get_database_display_strÚ_create_test_dbr   Úcloser   Ú	DATABASESÚaliasÚsettings_dictZMIGRATION_MODULESr   Úget_app_configsÚmaxÚserialize_db_to_stringZ_test_serialized_contentsZensure_connectionr   ÚenvironÚgetÚ mark_expected_failures_and_skips)	r   r    ÚautoclobberÚ	serializeÚkeepdbr   Útest_database_nameÚactionZold_migration_modulesr   r   r   Úcreate_test_db    sB    

z#BaseDatabaseCreation.create_test_dbc             C   s   |d | j jd< dS )z€
        Set this database up to be used in testing as a mirror of a primary
        database whose settings are given.
        r   N)r   r*   )r   Zprimary_settings_dictr   r   r   Úset_as_test_mirrorf   s    z'BaseDatabaseCreation.set_as_test_mirrorc                s.   ‡ fdd„}t ƒ }tjd|ƒ d|d� | ¡ S )z¤
        Serialize all data in the database into a JSON string.
        Designed only for test runner usage; will not handle large
        amounts of data.
        c              3   s¨   ddl m}  | ˆ jƒ}xŒt ¡ D ]€}|jd k	r |j|jkr |jt	j
kr xX| ¡ D ]L}|j ˆ j¡rPt ˆ jj|¡rP|j ˆ jj¡ |jjj¡}| ¡ E d H  qPW q W d S )Nr   )ÚMigrationLoader)Zdjango.db.migrations.loaderr8   r   r   r+   Zmodels_moduler   Zmigrated_appsÚnamer   ZTEST_NON_SERIALIZED_APPSZ
get_modelsÚ_metaZcan_migrater   Zallow_migrate_modelr)   Z_base_managerÚusingZorder_byÚpkÚiterator)r8   ÚloaderZ
app_configÚmodelZqueryset)r   r   r   Úget_objectst   s    


z@BaseDatabaseCreation.serialize_db_to_string.<locals>.get_objectsÚjsonN)ÚindentÚstream)r   r   r2   Úgetvalue)r   r@   Úoutr   )r   r   r-   m   s    z+BaseDatabaseCreation.serialize_db_to_stringc          
   C   sˆ   t |ƒ}tƒ }t| jjd��b | j ¡ �> x6tjd|| jjd�D ]}| ¡  | 	|j
jjj¡ q@W W dQ R X | jj|d� W dQ R X dS )zw
        Reload the database with data from a string generated by
        the serialize_db_to_string() method.
        )r;   rA   N)Útable_names)r   Úsetr	   r   r)   Zconstraint_checks_disabledr   ZdeserializeÚsaveÚaddÚobjectÚ	__class__r:   Zdb_tableZcheck_constraints)r   ÚdatarF   Úobjr   r   r   Údeserialize_db_from_string‹   s     z/BaseDatabaseCreation.deserialize_db_from_stringc             C   s    d| j j|dkrd| ndf S )zR
        Return display string for a database for use in various actions.
        z'%s'%sé   z ('%s')Ú )r   r)   )r   r    Zdatabase_namer   r   r   r%   ž   s    z.BaseDatabaseCreation._get_database_display_strc             C   s0   | j jd d r | j jd d S t| j jd  S )zû
        Internal implementation - return the name of the test DB that will be
        created. Only useful when called from create_test_db() and
        _create_test_db() and when no external munging is done with the 'NAME'
        settings.
        r   r   )r   r*   ÚTEST_DATABASE_PREFIX)r   r   r   r   r$   §   s    z&BaseDatabaseCreation._get_test_db_namec             C   s   |  d| ¡ d S )Nz%CREATE DATABASE %(dbname)s %(suffix)s)Úexecute)r   ÚcursorÚ
parametersr3   r   r   r   Ú_execute_create_test_db²   s    z,BaseDatabaseCreation._execute_create_test_dbc       	      C   s:  |   ¡ }| jj |¡|  ¡ dœ}|  ¡ ��}y|  |||¡ W nì tk
�r* } zÌ|rZ|S |  d| ¡ |sxt	d| ƒ}|s†|dk�ry@|dkr¨|  d|  
||¡f ¡ | d| ¡ |  |||¡ W n< tk
�r } z|  d| ¡ t d	¡ W d
d
}~X Y nX n|  d¡ t d¡ W d
d
}~X Y nX W d
Q R X |S )zF
        Internal implementation - create the test db tables.
        )ZdbnameÚsuffixz+Got an error creating the test database: %szXType 'yes' if you would like to try deleting the test database '%s', or 'no' to cancel: Úyesr   z,Destroying old test database for alias %s...zDROP DATABASE %(dbname)sz-Got an error recreating the test database: %srO   NzTests cancelled.)r$   r   ÚopsÚ
quote_nameÚsql_table_creation_suffixr   rU   Ú	Exceptionr   Úinputr%   rR   r   Úexit)	r   r    r1   r3   r4   Ztest_db_paramsrS   ÚeZconfirmr   r   r   r&   µ   s6    
&z$BaseDatabaseCreation._create_test_dbc             C   sL   | j jd }|dkr:d}|r d}|  d||  ||¡f ¡ |  |||¡ dS )z(
        Clone a test database.
        r   r   zCloning test databasezUsing existing clonez%s for alias %s...N)r   r*   r   r%   Ú_clone_test_db)r   rV   r    r1   r3   Zsource_database_namer5   r   r   r   Úclone_test_dbÞ   s    z"BaseDatabaseCreation.clone_test_dbc             C   s    | j j}|dd |d |¡i–S )zX
        Return a modified connection settings dict for the n-th clone of a DB.
        r   z{}_{})r   r*   Úformat)r   rV   Zorig_settings_dictr   r   r   Úget_test_db_clone_settingsñ   s    z/BaseDatabaseCreation.get_test_db_clone_settingsc             C   s   t dƒ‚dS )zI
        Internal implementation - duplicate the test db tables.
        znThe database backend doesn't support cloning databases. Disable the option to run tests in parallel processes.N)ÚNotImplementedError)r   rV   r    r3   r   r   r   r_   û   s    z#BaseDatabaseCreation._clone_test_dbNc             C   s–   | j  ¡  |dkr | j jd }n|  |¡d }|dkr\d}|rBd}|  d||  ||¡f ¡ |sl|  ||¡ |dk	r’|tj| j j	 d< || j jd< dS )zv
        Destroy a test database, prompting the user for confirmation if the
        database already exists.
        Nr   r   Z
DestroyingZ
Preservingz %s test database for alias %s...)
r   r'   r*   rb   r   r%   Ú_destroy_test_dbr   r(   r)   )r   Zold_database_namer    r3   rV   r4   r5   r   r   r   Údestroy_test_db  s     
z$BaseDatabaseCreation.destroy_test_dbc          	   C   s0   |   ¡ �}| d| jj |¡ ¡ W dQ R X dS )zF
        Internal implementation - remove the test db tables.
        zDROP DATABASE %sN)r   rR   r   rX   rY   )r   r4   r    rS   r   r   r   rd   !  s    
z%BaseDatabaseCreation._destroy_test_dbc       
      C   sÚ   x\| j jjD ]N}| d¡\}}}| d¡d }|tjkrt|ƒ}t||ƒ}t	||t
|ƒƒ qW xv| j jj ¡ D ]d\}}	xZ|	D ]R}| d¡\}}}| d¡d }|tjkr|t|ƒ}t||ƒ}t	||t|ƒ|ƒƒ q|W qnW dS )z›
        Mark tests in Django's test suite which are expected failures on this
        database and test which should be skipped on this database.
        Ú.r   N)r   ÚfeaturesZdjango_test_expected_failuresÚ
rpartitionÚsplitr   ZINSTALLED_APPSr
   ÚgetattrÚsetattrr   Zdjango_test_skipsÚitemsr   )
r   Z	test_nameZtest_case_nameÚ_Ztest_method_nameZtest_appZ	test_caseZtest_methodÚreasonÚtestsr   r   r   r0   -  s    




z5BaseDatabaseCreation.mark_expected_failures_and_skipsc             C   s   dS )zQ
        SQL to append to the end of the test table creation statements.
        rP   r   )r   r   r   r   rZ   D  s    z.BaseDatabaseCreation.sql_table_creation_suffixc             C   s$   | j j}|d |d |d |  ¡ fS )zÇ
        Return a tuple with elements of self.connection.settings_dict (a
        DATABASES setting value) that uniquely identify a database
        accordingly to the RDBMS particularities.
        ZHOSTZPORTZENGINE)r   r*   r$   )r   r*   r   r   r   Útest_db_signatureJ  s
    z&BaseDatabaseCreation.test_db_signature)r   FTF)F)F)r   FF)F)Nr   FN)Ú__name__Ú
__module__Ú__qualname__Ú__doc__r   r   r   r6   r7   r-   rN   r%   r$   rU   r&   r`   rb   r_   re   rd   r0   rZ   rp   r   r   r   r   r      s(   
F	

)



r   )r   r   Úior   Zunittestr   r   Zdjango.appsr   Zdjango.confr   Zdjango.corer   Z	django.dbr   Zdjango.db.transactionr	   Zdjango.utils.module_loadingr
   rQ   r   r   r   r   r   Ú<module>   s   