3
[x.                 @   sZ   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ZG dd	 d	ZdS )
    N)StringIO)apps)settings)serializers)routerZtest_c               @   s   e Zd ZdZdd Ze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d,ddZd-d d!Zd"d# Zd$d% Zd&d' ZdS ).BaseDatabaseCreationzs
    Encapsulate backend-specific differences pertaining to creation and
    destruction of the test database.
    c             C   s
   || _ d S )N)
connection)selfr    r
   D/tmp/pip-install-j7i95hgp/django/django/db/backends/base/creation.py__init__   s    zBaseDatabaseCreation.__init__c             C   s   | j jS )zH
        Used to be defined here, now moved to DatabaseWrapper.
        )r   _nodb_connection)r	   r
   r
   r   r      s    z%BaseDatabaseCreation._nodb_connection   FTc             C   s   ddl m} | j }|dkr@d}|r(d}td|| j||f  | j||| | jj  |tj	| jj
 d< || jjd< |dt|d dd	| jj
d
d |r| j | j_|d| jj
d | jj  |S )z
        Create a test database, prompting the user for confirmation if the
        database already exists. Return the name of the test database created.
        r   )call_commandr   ZCreatingzUsing existingz %s test database for alias %s...NAMEZmigrateFT)	verbosityinteractivedatabaseZ
run_syncdbZcreatecachetable)r   )Zdjango.core.managementr   _get_test_db_nameprint_get_database_display_str_create_test_dbr   closer   	DATABASESaliassettings_dictmaxserialize_db_to_stringZ_test_serialized_contentsZensure_connection)r	   r   autoclobber	serializekeepdbr   test_database_nameactionr
   r
   r   create_test_db   s0    

z#BaseDatabaseCreation.create_test_dbc             C   s   |d | j jd< dS )z
        Set this database up to be used in testing as a mirror of a primary
        database whose settings are given.
        r   N)r   r   )r	   Zprimary_settings_dictr
   r
   r   set_as_test_mirrorU   s    z'BaseDatabaseCreation.set_as_test_mirrorc                s   ddl m} |j}g  x@tj D ]4}|jdk	r$|j|jkr$|jt	j
kr$ j|df q$W  fdd}t }tjd| d|d |j S )z
        Serialize all data in the database into a JSON string.
        Designed only for test runner usage; will not handle large
        amounts of data.
        r   )MigrationLoaderNc              3   s`   xZt j D ]L} | jjjrtjjj| r| jj	jjj
| jjj}|j E d H  qW d S )N)r   Zsort_dependenciesZ_metaZcan_migrater   r   Zallow_migrate_modelr   Z_default_managerusingZorder_bypknameiterator)modelZqueryset)app_listr	   r
   r   get_objectso   s
    z@BaseDatabaseCreation.serialize_db_to_string.<locals>.get_objectsjson)indentstream)Zdjango.db.migrations.loaderr%   r   r   Zget_app_configsZmodels_modulelabelZmigrated_appsr(   r   ZTEST_NON_SERIALIZED_APPSappendr   r   r   getvalue)r	   r%   loaderZ
app_configr,   outr
   )r+   r	   r   r   \   s    

z+BaseDatabaseCreation.serialize_db_to_stringc             C   s2   t |}x$tjd|| jjdD ]}|j  qW dS )zw
        Reload the database with data from a string generated by
        the serialize_db_to_string() method.
        r-   )r&   N)r   r   Zdeserializer   r   save)r	   dataobjr
   r
   r   deserialize_db_from_stringz   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'%s   z ('%s') )r   r   )r	   r   Zdatabase_namer
   r
   r   r      s    z.BaseDatabaseCreation._get_database_display_strc             C   s0   | j jd d r | j jd d S t| j jd  S )z
        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.
        ZTESTr   )r   r   TEST_DATABASE_PREFIX)r	   r
   r
   r   r      s    z&BaseDatabaseCreation._get_test_db_namec             C   s   |j d|  d S )Nz%CREATE DATABASE %(dbname)s %(suffix)s)execute)r	   cursor
parametersr    r
   r
   r   _execute_create_test_db   s    z,BaseDatabaseCreation._execute_create_test_dbc       	   #   C   s<  | j  }| jjj|| j d}| jj }y| j||| W n tk
r, } z|r\|S t	j
jd|  |s|td| }|s|dkr
y>|dkrtd| j||f  |jd|  | j||| W n> tk
r } z t	j
jd|  t	jd	 W Y d
d
}~X nX ntd t	jd W Y d
d
}~X nX W d
Q R X |S )zF
        Internal implementation - create the test db tables.
        )Zdbnamesuffixz,Got an error creating the test database: %s
zXType 'yes' if you would like to try deleting the test database '%s', or 'no' to cancel: yesr   z,Destroying old test database for alias %s...zDROP DATABASE %(dbname)sz.Got an error recreating the test database: %s
r9   NzTests cancelled.)r   r   ops
quote_namesql_table_creation_suffixr   r=   r?   	Exceptionsysstderrwriteinputr   r   r<   exit)	r	   r   r   r    r!   Ztest_db_paramsr=   eZconfirmr
   r
   r   r      s:    

&z$BaseDatabaseCreation._create_test_dbc             C   sJ   | j jd }|dkr8d}|r d}td|| j||f  | j||| dS )z(
        Clone a test database.
        r   r   zCloning test databasezUsing existing clonez%s for alias %s...N)r   r   r   r   _clone_test_db)r	   r@   r   r   r    Zsource_database_namer"   r
   r
   r   clone_test_db   s    z"BaseDatabaseCreation.clone_test_dbc             C   s    | j j}|ddj|d |iS )zX
        Return a modified connection settings dict for the n-th clone of a DB.
        r   z{}_{})r   r   format)r	   r@   Zorig_settings_dictr
   r
   r   get_test_db_clone_settings   s    z/BaseDatabaseCreation.get_test_db_clone_settingsc             C   s   t ddS )zI
        Internal implementation - duplicate the test db tables.
        znThe database backend doesn't support cloning databases. Disable the option to run tests in parallel processes.N)NotImplementedError)r	   r@   r   r    r
   r
   r   rL      s    z#BaseDatabaseCreation._clone_test_dbNc             C   s   | j j  |dkr | j jd }n| j|d }|dkrZd}|rBd}td|| j||f  |sj| j|| |dk	r|tj| j j	 d< || j jd< dS )zv
        Destroy a test database, prompting the user for confirmation if the
        database already exists.
        Nr   r   Z
DestroyingZ
Preservingz %s test database for alias %s...)
r   r   r   rO   r   r   _destroy_test_dbr   r   r   )r	   Zold_database_namer   r    r@   r!   r"   r
   r
   r   destroy_test_db   s     
z$BaseDatabaseCreation.destroy_test_dbc             C   s4   | j jj }|jd| j jj|  W dQ R X dS )zF
        Internal implementation - remove the test db tables.
        zDROP DATABASE %sN)r   r   r=   r<   rB   rC   )r	   r!   r   r=   r
   r
   r   rQ     s    z%BaseDatabaseCreation._destroy_test_dbc             C   s   dS )zQ
        SQL to append to the end of the test table creation statements.
        r:   r
   )r	   r
   r
   r   rD     s    z.BaseDatabaseCreation.sql_table_creation_suffixc             C   s$   | j j}|d |d |d | j fS )z
        Return a tuple with elements of self.connection.settings_dict (a
        DATABASES setting value) that uniquely identify a database
        accordingly to the RDBMS particularities.
        ZHOSTZPORTZENGINE)r   r   r   )r	   r   r
   r
   r   test_db_signature  s
    z&BaseDatabaseCreation.test_db_signature)r   FTF)F)F)r   FF)F)Nr   FN)__name__
__module____qualname____doc__r   propertyr   r#   r$   r   r8   r   r   r?   r   rM   rO   rL   rR   rQ   rD   rS   r
   r
   r
   r   r      s$   
8		

+



r   )rF   ior   Zdjango.appsr   Zdjango.confr   Zdjango.corer   Z	django.dbr   r;   r   r
   r
   r
   r   <module>   s   