o
    ÕèFh5O  ã                   @   st   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mZ G d	d
„ d
eƒZdS )é    N)ÚDecimal)ÚApps)ÚNotSupportedError)ÚBaseDatabaseSchemaEditor)Ú	Statement)Ústrip_quotes)ÚNOT_PROVIDEDÚUniqueConstraintc                       sÂ   e Zd ZdZdZdZeZdZdZdZ	dZ
dZ‡ fdd„Z‡ fd	d
„Zdd„ Zdd„ Z	d#dd„Zd$‡ fdd„	Z‡ fdd„Z‡ fdd„Z	d%dd„Zdd„ Z‡ fdd„Z‡ fdd „Zd!d"„ Z‡  ZS )&ÚDatabaseSchemaEditorzDROP TABLE %(table)sNzEREFERENCES %(to_table)s (%(to_column)s) DEFERRABLE INITIALLY DEFERREDz,ALTER TABLE %(table)s DROP COLUMN %(column)sz7CREATE UNIQUE INDEX %(name)s ON %(table)s (%(columns)s)zDROP INDEX %(name)sc                    s   | j  ¡ s	tdƒ‚tƒ  ¡ S )NzüSQLite schema editor cannot be used while foreign key constraint checks are enabled. Make sure to disable them before entering a transaction.atomic() context because SQLite does not support disabling them in the middle of a multi-statement transaction.)Ú
connectionÚdisable_constraint_checkingr   ÚsuperÚ	__enter__©Úself©Ú	__class__© úZ/var/www/html/loop/nvenv/lib/python3.10/site-packages/django/db/backends/sqlite3/schema.pyr      s
   
ÿ
zDatabaseSchemaEditor.__enter__c                    s(   | j  ¡  tƒ  |||¡ | j  ¡  d S ©N)r   Úcheck_constraintsr   Ú__exit__Úenable_constraint_checking)r   Úexc_typeÚ	exc_valueÚ	tracebackr   r   r   r   &   s   
zDatabaseSchemaEditor.__exit__c                 C   sÀ   zdd l }| |¡}W n ty   Y n
 |jy   Y nw t|tƒr)tt|ƒƒS t|tt	tfƒr5t|ƒS t|tƒrBd| 
dd¡ S |d u rHdS t|tttfƒrVd| ¡  S td|t|ƒf ƒ‚)Nr   z'%s'ú'z''ÚNULLzX'%s'z*Cannot quote parameter value %r of type %s)Úsqlite3ÚadaptÚImportErrorÚProgrammingErrorÚ
isinstanceÚboolÚstrÚintr   ÚfloatÚreplaceÚbytesÚ	bytearrayÚ
memoryviewÚhexÚ
ValueErrorÚtype)r   Úvaluer   r   r   r   Úquote_value+   s*   ÿ

ÿz DatabaseSchemaEditor.quote_valuec                 C   s
   |   |¡S r   )r/   )r   r.   r   r   r   Úprepare_defaultJ   s   
z$DatabaseSchemaEditor.prepare_defaultc              	      s¤  ‡fdd„‰‡fdd„ˆj jD ƒ}‡fdd„ˆj jD ƒ}i ‰d}|p#g }t|ddƒs3td	d
„ |D ƒƒr[t| ¡ ƒD ]!\‰}|jrZt‡fdd
„|D ƒƒsZd|_|}|jrZ|ˆ= ||j= q9|r{|||j	< |j
tu r{|js{|js{|jr{ˆ ˆ |¡¡||j< |D ]X}	|	\}
}| |
j	d¡ | |
jd¡ |||j	< |j	ˆ|
j	< |jr q}|
jrÌ|jsÌ|j
tu r´ˆ ˆ |¡¡}nˆ |¡\}}dˆ |
j¡|dœ }|||j< q}ˆ |
j¡||j< q}ˆ ró|ˆ j	= | ˆ jd¡ ˆ jróˆ jjj jróˆ ˆ jj¡S tƒ }‡fdd„ˆj jD ƒ}‡fdd„ˆj jD ƒ}ˆj j}ˆ �r‡ fdd„|D ƒ}tˆj jƒ}t |¡}ˆj jˆj j |||||dœ}t!dd|ƒ}||d< ˆj"|d< t!ˆj j#ˆj$|ƒ t |¡}ˆj jdt%ˆj j ƒ |||||dœ}t!dd|ƒ}||d< ˆj"|d< t!dˆj j# ˆj$|ƒ}ˆ &|¡ ˆ 'dˆ |j j ¡d (‡fdd
„|D ƒ¡d (| )¡ ¡ˆ ˆj j ¡f ¡ ˆjˆdd� ˆ *||j j ˆj j ¡ ˆj+D ]}ˆ '|¡ �q¼g ˆ_+|�rÐd|_dS dS )a|  
        Shortcut to transform a model from old_model into new_model

        This follows the correct procedure to perform non-rename or column
        addition operations based on SQLite's documentation

        https://www.sqlite.org/lang_altertable.html#caution

        The essential steps are:
          1. Create a table with the updated definition called "new__app_model"
          2. Copy the data from the existing "app_model" table to the new table
          3. Drop the "app_model" table
          4. Rename the "new__app_model" table to "app_model"
          5. Restore any index of the previous "app_model" table.
        c                    s   | j o| jjˆ u S r   )Úis_relationÚremote_fieldÚmodel)Úf)r3   r   r   Úis_self_referentialc   s   z?DatabaseSchemaEditor._remake_table.<locals>.is_self_referentialc                    s$   i | ]}|j ˆ |ƒr| ¡ n|“qS r   )ÚnameÚclone©Ú.0r4   )r5   r   r   Ú
<dictcomp>g   s    ÿÿz6DatabaseSchemaEditor._remake_table.<locals>.<dictcomp>c                    s&   i | ]}|j d u r|jˆ  |j¡“qS ©F)Ú	generatedÚcolumnÚ
quote_namer8   r   r   r   r:   m   s
    
þNÚprimary_keyFc                 s   s    � | ]\}}t |d dƒV  qdS )r?   FN)Úgetattr©r9   Ú_Ú	new_fieldr   r   r   Ú	<genexpr>x   s   € 
ÿz5DatabaseSchemaEditor._remake_table.<locals>.<genexpr>c                 3   s   � | ]
\}}ˆ |j kV  qd S r   ©r6   rA   rE   r   r   rD   |   s
   € ÿ
ýzcoalesce(%(col)s, %(default)s))ÚcolÚdefaultc                    ó   g | ]}‡ fd d„|D ƒ‘qS )c                    ó   g | ]}ˆ   ||¡‘qS r   ©Úget©r9   Ún©Úrename_mappingr   r   Ú
<listcomp>¸   ó    úADatabaseSchemaEditor._remake_table.<locals>.<listcomp>.<listcomp>r   )r9   ÚuniquerN   r   r   rP   ·   ó    ÿÿz6DatabaseSchemaEditor._remake_table.<locals>.<listcomp>c                    rH   )c                    rI   r   rJ   rL   rN   r   r   rP   À   rQ   rR   r   ©r9   ÚindexrN   r   r   rP   ¿   rT   c                    s   g | ]
}ˆ j |jvr|‘qS r   )r6   ÚfieldsrU   ©Údelete_fieldr   r   rP   Æ   s    )Ú	app_labelÚdb_tableÚunique_togetherÚindex_togetherÚindexesÚconstraintsÚappsÚMetar   Ú
__module__znew__%szNew%sú%INSERT INTO %s (%s) SELECT %s FROM %sú, c                 3   s   � | ]}ˆ   |¡V  qd S r   )r>   )r9   Úxr   r   r   rD   ü   s   € )Úhandle_autom2mT),Ú_metaÚlocal_concrete_fieldsr@   ÚanyÚlistÚitemsr?   Úauto_createdr=   r6   Ú
db_defaultr   Úmany_to_manyr<   Úconcreter0   Úeffective_defaultÚpopÚnullÚdb_default_sqlr>   r2   ÚthroughÚdelete_modelr   r\   r]   r^   r_   ÚcopyÚdeepcopyrZ   r[   r-   rb   Úobject_nameÚ	__bases__r   Úcreate_modelÚexecuteÚjoinÚvaluesÚalter_db_tableÚdeferred_sql)r   r3   Úcreate_fieldrY   Úalter_fieldsÚbodyÚmappingÚrestore_pk_fieldÚfieldÚalter_fieldÚ	old_fieldrC   rG   rB   Úcase_sqlr`   r\   r]   r^   r_   Ú	body_copyÚmeta_contentsÚmetaÚ	new_modelÚsqlr   )rY   r5   r3   r6   rO   r   r   Ú_remake_tableM   sô   
þ
þÿü€

ÿÿþ
ÿ


þÿ
þ
þ
þ
ÿ
ù	

ù	

üÿÿý

ÿz"DatabaseSchemaEditor._remake_tableTc                    sj   |r
t ƒ  |¡ d S |  | jd|  |jj¡i ¡ t| jƒD ]}t	|t
ƒr2| |jj¡r2| j |¡ qd S )NÚtable)r   ru   r{   Úsql_delete_tabler>   rg   r[   rj   r   r"   r   Úreferences_tableÚremove)r   r3   rf   r�   r   r   r   ru     s   ÿÿÿÿ€üz!DatabaseSchemaEditor.delete_modelc                    sŠ   ddl m} |jr|jjjjr|  |jj¡ dS |js3|j	s3|j
r3|  |¡dus3|jtur<t|j|ƒs<| j||d� dS tƒ  ||¡ dS )zCreate a field on a model.r   )ÚValueN)r€   )Údjango.db.models.expressionsr“   rn   r2   rt   rg   rl   rz   r?   rS   rr   rp   rm   r   r"   rŽ   r   Ú	add_field)r   r3   r…   r“   r   r   r   r•   &  s   ýüû	

ÿzDatabaseSchemaEditor.add_fieldc                    sŽ   |j r|jjjjr|  |jj¡ dS dS | jjjr1|j	s1|j
s1|js1|jr(|js1tƒ  ||¡ dS |j| jd�d du r>dS | j||d� dS )z…
        Remove a field from a model. Usually involves deleting a column,
        but for M2Ms may involve deleting a table.
        )r   r-   NrX   )rn   r2   rt   rg   rl   ru   r   ÚfeaturesÚcan_alter_table_drop_columnr?   rS   Údb_indexÚdb_constraintr   Úremove_fieldÚdb_parametersrŽ   )r   r3   r…   r   r   r   rš   B  s(   ÿÿüûúùù	z!DatabaseSchemaEditor.remove_fieldFc	                 C   sN  |j |j kr+|  ||¡|  ||¡kr+|jr|js+|jr|js+|  |  |jj|||¡¡S | j|||fgd� | 	d¡}	| 	d¡}
|j
r¡||ksJ|	|
kr£tƒ }|jj}|jD ]&}|j|kr\qT|jsl|j|jkrk| |j¡ qT|jrz|jjjrz| |j¡ qT|jr—|jD ]}|j|kr‰q�|jjjjr–| |jj¡ q�|D ]}|  |¡ q™dS dS dS )z3Perform a "physical" (non-ManyToMany) field update.©r�   Ú	collationN)r=   Ú
column_sqlr2   r™   r{   Ú_rename_field_sqlrg   r[   rŽ   rK   rS   Úsetr3   Úrelated_objectsÚrelated_modelrn   Ú
field_namer6   Úaddr?   rt   rl   )r   r3   r‡   rC   Úold_typeÚnew_typeÚold_db_paramsÚnew_db_paramsÚstrictÚold_collationÚnew_collationÚrelated_modelsÚoptsr2   rn   r¢   r   r   r   Ú_alter_field^  sX   þýüûÿÿ



€€

€êz!DatabaseSchemaEditor._alter_fieldc                 C   sô   |j jjj|j jjjkr=| j|j j|j jj | ¡ ¡|j jj | ¡ ¡f|j jj | ¡ ¡|j jj | ¡ ¡fgd� dS |  |j j¡ |  	d|  
|j jjj¡d d| ¡ | ¡ g¡d d| ¡ | ¡ g¡|  
|j jjj¡f ¡ |  |j j¡ dS )z*Alter M2Ms to repoint their to= endpoints.rœ   Nrc   rd   Úid)r2   rt   rg   r[   rŽ   Ú	get_fieldÚm2m_reverse_field_nameÚm2m_field_namerz   r{   r>   r|   Úm2m_column_nameÚm2m_reverse_nameru   )r   r3   r‡   rC   r©   r   r   r   Ú_alter_many_to_many˜  sV   

ÿ
ÿ
ÿù
ÿ
ÿùôþýÿýÿðÿÿz(DatabaseSchemaEditor._alter_many_to_manyc                    óB   t |tƒr|js|js|js|jrtƒ  ||¡ d S |  |¡ d S r   )	r"   r	   Ú	conditionÚcontains_expressionsÚincludeÚ
deferrabler   Úadd_constraintrŽ   ©r   r3   Ú
constraintr   r   r   r»   Ø  ó   
ÿþýüz#DatabaseSchemaEditor.add_constraintc                    r¶   r   )	r"   r	   r·   r¸   r¹   rº   r   Úremove_constraintrŽ   r¼   r   r   r   r¿   ã  r¾   z&DatabaseSchemaEditor.remove_constraintc                 C   s   d| S )NzCOLLATE r   )r   r�   r   r   r   Ú_collate_sqlî  s   z!DatabaseSchemaEditor._collate_sql)NNN)Tr;   )Ú__name__rb   Ú__qualname__r�   Úsql_create_fkÚsql_create_inline_fkÚsql_create_column_inline_fkÚsql_delete_columnÚsql_create_uniqueÚsql_delete_uniqueÚsql_alter_table_commentÚsql_alter_column_commentr   r   r/   r0   rŽ   ru   r•   rš   r®   rµ   r»   r¿   rÀ   Ú__classcell__r   r   r   r   r
      s6    ÿ
ÿ H%
÷:@r
   )rv   Údecimalr   Údjango.apps.registryr   Ú	django.dbr   Údjango.db.backends.base.schemar   Ú!django.db.backends.ddl_referencesr   Údjango.db.backends.utilsr   Údjango.db.modelsr   r	   r
   r   r   r   r   Ú<module>   s    