o
    ˜¨Êhæ[  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 d	l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UniqueConstraint)Úatomicc                       sä   e Zd ZdZdZdZe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d+‡ f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$„Z‡ fd%d&„Zd'd(„ Z‡  ZS )-ÚDatabaseSchemaEditorzDROP TABLE %(table)sNzEREFERENCES %(to_table)s (%(to_column)s) DEFERRABLE INITIALLY DEFERREDz,ALTER TABLE %(table)s DROP COLUMN %(column)sz7CREATE UNIQUE INDEX %(name)s ON %(table)s (%(columns)s)zDROP INDEX %(name)sc                    s   | j  ¡ s	tdƒ‚tƒ  ¡ S )NzüSQLite schema editor cannot be used while foreign key constraint checks are enabled. Make sure to disable them before entering a transaction.atomic() context because SQLite does not support disabling them in the middle of a multi-statement transaction.)Ú
connectionÚdisable_constraint_checkingr   ÚsuperÚ	__enter__©Úself©Ú	__class__© úS/var/www/html/env/lib/python3.10/site-packages/django/db/backends/sqlite3/schema.pyr      s
   
ÿ
zDatabaseSchemaEditor.__enter__c                    s(   | j  ¡  tƒ  |||¡ | j  ¡  d S ©N)r   Úcheck_constraintsr   Ú__exit__Úenable_constraint_checking)r   Úexc_typeÚ	exc_valueÚ	tracebackr   r   r   r   &   s   
zDatabaseSchemaEditor.__exit__c                 C   sÀ   zdd l }| |¡}W n ty   Y n
 |jy   Y nw t|tƒr)tt|ƒƒS t|tt	tfƒr5t|ƒS t|tƒrBd| 
dd¡ S |d u rHdS t|tttfƒrVd| ¡  S td|t|ƒf ƒ‚)Nr   z'%s'ú'z''ÚNULLzX'%s'z*Cannot quote parameter value %r of type %s)Úsqlite3ÚadaptÚImportErrorÚProgrammingErrorÚ
isinstanceÚboolÚstrÚintr   ÚfloatÚreplaceÚbytesÚ	bytearrayÚ
memoryviewÚhexÚ
ValueErrorÚtype)r   Úvaluer   r   r   r   Úquote_value+   s*   ÿ

ÿz DatabaseSchemaEditor.quote_valuec                 C   s
   |   |¡S r   )r/   )r   r.   r   r   r   Úprepare_defaultJ   s   
z$DatabaseSchemaEditor.prepare_defaultFc           	      C   s¤   | j  ¡ �C}| j j |¡D ]2}|r|j|krq| j j ||j¡}| ¡ D ]\}}||kr>|du s4||kr>  W d  ƒ dS q$qW d  ƒ dS 1 sKw   Y  dS )a  
        Return whether or not the provided table name is referenced by another
        one. If `column_name` is specified, only references pointing to that
        column are considered. If `ignore_self` is True, self-referential
        constraints are ignored.
        NTF)r   ÚcursorÚintrospectionÚget_table_listÚnameÚget_relationsÚvalues)	r   Ú
table_nameÚcolumn_nameÚignore_selfr1   Úother_tableÚ	relationsÚconstraint_columnÚconstraint_tabler   r   r   Ú_is_referenced_by_fk_constraintM   s&   	ÿõ€ú
ÿôz4DatabaseSchemaEditor._is_referenced_by_fk_constraintTc                    sh   | j jjs*|r*|  |¡r*| j jrtd| ƒ‚| j  ¡  tƒ  |||¡ | j  	¡  d S tƒ  |||¡ d S )Nz°Renaming the %r table while in a transaction is not supported on SQLite < 3.26 because it would break referential integrity. Try adding `atomic = False` to the Migration class.)
r   ÚfeaturesÚ!supports_atomic_references_renamer>   Úin_atomic_blockr   r   r   Úalter_db_tabler   )r   ÚmodelÚold_db_tableÚnew_db_tableÚdisable_constraintsr   r   r   rB   d   s    ÿþýûÿ
z#DatabaseSchemaEditor.alter_db_tablec              	      sœ  |   ||¡sd S |j}|jj}| ¡ \}}|j|krÂ| jjjsÂ| j||dd�rÂ| jj	r5t
d|jj|f ƒ‚t| jjƒ�b tƒ j||||d� | j ¡ �C}	|	 d¡ ¡ d }
|	 d¡ d| }| ¡ d	 }|| }|| }|	 d
||f¡ |	 d|
d	  ¡ |	 d¡ |	 d¡ W d   ƒ n1 s‘w   Y  W d   ƒ n1 s w   Y  | j ¡ �}	|	 d¡ W d   ƒ d S 1 s»w   Y  d S tƒ j||||d� d S )NT)r9   z´Renaming the %r.%r column while in a transaction is not supported on SQLite < 3.26 because it would break referential integrity. Try adding `atomic = False` to the Migration class.)ÚstrictzPRAGMA schema_versionr   zPRAGMA writable_schema = 1z REFERENCES "%s" ("%%s") é   z3UPDATE sqlite_master SET sql = replace(sql, %s, %s)zPRAGMA schema_version = %dzPRAGMA writable_schema = 0zPRAGMA integrity_checkÚVACUUM)Ú_field_should_be_alteredr4   Ú_metaÚdb_tableÚget_attname_columnr   r?   r@   r>   rA   r   r	   Úaliasr   Úalter_fieldr1   ÚexecuteÚfetchone)r   rC   Ú	old_fieldÚ	new_fieldrG   Úold_field_namer7   Ú_Úold_column_namer1   Úschema_versionÚreferences_templateÚnew_column_nameÚsearchÚreplacementr   r   r   rO   {   sV   
ÿÿþ
ûÿÿ
þ
î€û"ÿz DatabaseSchemaEditor.alter_fieldc              	      sZ  ‡fdd„‰‡fdd„ˆj jD ƒ}‡fdd„ˆj jD ƒ}i ‰d}t|ddƒs0|rVt|d	 ddƒrVt| ¡ ƒD ]\}}	|	jrU|rF||d	 jksUd|	_|	}|	jrU||= ||	j= q6|rn|||j< |j	sn|j
rnˆ ˆ |¡¡||j< |r³|\}
}| |
jd¡ | |
jd¡ |||j< |
jr¤|js¤d
ˆ |
j¡ˆ ˆ |¡¡dœ }|||j< n	ˆ |
j¡||j< |jˆ|
j< ˆ rÍ|ˆ j= |ˆ j= ˆ j	rÍˆ jjj jrÍˆ 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 rõ‡ 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 jˆj jdd� ˆj&D ]}ˆ "|¡ �q—g ˆ_&|�r«d|_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_fieldrC   )Úf)rC   r   r   Úis_self_referentialÅ   s   z?DatabaseSchemaEditor._remake_table.<locals>.is_self_referentialc                    s$   i | ]}|j ˆ |ƒr| ¡ n|“qS r   )r4   Úclone©Ú.0r^   )r_   r   r   Ú
<dictcomp>É   s    ÿÿz6DatabaseSchemaEditor._remake_table.<locals>.<dictcomp>c                    s   i | ]
}|j ˆ  |j ¡“qS r   )ÚcolumnÚ
quote_namera   r   r   r   rc   Ï   s    ÿÿNÚprimary_keyFrH   z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©rb   Ún©Úrename_mappingr   r   Ú
<listcomp>  ó    úADatabaseSchemaEditor._remake_table.<locals>.<listcomp>.<listcomp>r   )rb   Úuniquero   r   r   rq     ó    ÿÿz6DatabaseSchemaEditor._remake_table.<locals>.<listcomp>c                    ri   )c                    rj   r   rk   rm   ro   r   r   rq     rr   rs   r   ©rb   Úindexro   r   r   rq     ru   c                    s   g | ]
}ˆ j |jvr|‘qS r   )r4   Úfieldsrv   ©Údelete_fieldr   r   rq     s    )Ú	app_labelrL   Ú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   )re   )rb   Úxr   r   r   Ú	<genexpr>Q  s   € z5DatabaseSchemaEditor._remake_table.<locals>.<genexpr>)Úhandle_autom2m)rF   T)'rK   Úlocal_concrete_fieldsÚgetattrÚlistÚitemsrf   r4   Úauto_createdrd   Úmany_to_manyÚconcreter0   Úeffective_defaultÚpopÚnullre   r]   ÚthroughÚdelete_modelr   r|   r}   r~   r   ÚcopyÚdeepcopyr{   rL   r-   r‚   Úobject_nameÚ	__bases__r   Úcreate_modelrP   Újoinr6   rB   Údeferred_sql)r   rC   Úcreate_fieldrz   rO   ÚbodyÚmappingÚrestore_pk_fieldr4   ÚfieldrR   rS   Úcase_sqlr€   r|   r}   r~   r   Ú	body_copyÚmeta_contentsÚmetaÚ	new_modelÚsqlr   )rz   r_   rC   rp   r   r   Ú_remake_table°   sä   
þ
þÿÿý€

ÿ

þÿ
þ
þ
þ
ÿ
ù	

ù	

üÿÿü

ÿz"DatabaseSchemaEditor._remake_tablec                    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   r“   rP   Úsql_delete_tablere   rK   rL   rŠ   rš   r"   r   Úreferences_tableÚremove)r   rC   r‡   r¥   r   r   r   r“   j  s   ÿÿÿÿ€üz!DatabaseSchemaEditor.delete_modelc                    sD   |j s|js|jr|  |¡dur| j||d� dS tƒ  ||¡ dS )zCreate a field on a model.N)r›   )rf   rt   r‘   r�   r¦   r   Ú	add_field©r   rC   rŸ   r   r   r   r«   |  s   ýü	÷
zDatabaseSchemaEditor.add_fieldc                    sˆ   |j r|jjjjr|  |jj¡ dS dS | jjjr.|j	s.|j
s.|jr%|js.t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-   Nry   )r�   r]   r’   rK   rŒ   r“   r   r?   Úcan_alter_table_drop_columnrf   rt   Údb_constraintr   Úremove_fieldÚdb_parametersr¦   r¬   r   r   r   r¯   Ž  s$   ÿÿüûúúz!DatabaseSchemaEditor.remove_fieldc	                 C   sV  | j jjr0|j|jkr0|  ||¡|  ||¡kr0|jr|js0|jr#|js0|  |  |j	j
|||¡¡S | j|||fd� | d¡}	| d¡}
|jr¥||ksN|	|
kr§tƒ }|jj	}|jD ]&}|j|kr`qX|jsp|j|jkro| |j¡ qX|jr~|jj	jr~| |j¡ qX|jr›|jD ]}|j|kr�q…|jjj	jrš| |jj¡ q…|D ]}|  |¡ q�dS dS dS )z3Perform a "physical" (non-ManyToMany) field update.©rO   Ú	collationN)r   r?   Úcan_alter_table_rename_columnrd   Ú
column_sqlr]   r®   rP   Ú_rename_field_sqlrK   rL   r¦   rl   rt   ÚsetrC   Úrelated_objectsÚrelated_modelr�   Ú
field_namer4   Úaddrf   r’   rŒ   )r   rC   rR   rS   Úold_typeÚnew_typeÚold_db_paramsÚnew_db_paramsrG   Úold_collationÚnew_collationÚrelated_modelsÚoptsr]   r�   r¸   r   r   r   Ú_alter_field©  s\   ÿþýüûÿÿ



€€

€êz!DatabaseSchemaEditor._alter_fieldc                 C   sÌ   |j jjj|j jjjkr)| j|j j|j jj | ¡ ¡|j jj | ¡ ¡f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.r±   Nrƒ   r„   Úid)r]   r’   rK   rL   r¦   Ú	get_fieldÚm2m_reverse_field_namer˜   rP   re   r™   Úm2m_column_nameÚm2m_reverse_namer“   )r   rC   rR   rS   rG   r   r   r   Ú_alter_many_to_manyä  sF   

ÿ
ÿ
ÿø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_constraintr¦   ©r   rC   Ú
constraintr   r   r   rÏ     ó   
ÿþýüz#DatabaseSchemaEditor.add_constraintc                    rÊ   r   )	r"   r   rË   rÌ   rÍ   rÎ   r   Úremove_constraintr¦   rÐ   r   r   r   rÓ   #  rÒ   z&DatabaseSchemaEditor.remove_constraintc                 C   s   d| S )NzCOLLATE r   )r   r²   r   r   r   Ú_collate_sql.  s   z!DatabaseSchemaEditor._collate_sql)NF)T)F)NNN)Ú__name__r‚   Ú__qualname__r¨   Úsql_create_fkÚsql_create_inline_fkÚsql_create_column_inline_fkÚsql_delete_columnÚsql_create_uniqueÚsql_delete_uniquer   r   r/   r0   r>   rB   rO   r¦   r“   r«   r¯   rÃ   rÉ   rÏ   rÓ   rÔ   Ú__classcell__r   r   r   r   r
      s<    ÿ
ÿÿ6
ÿ ;$
÷;4r
   )r”   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   Údjango.db.transactionr	   r
   r   r   r   r   Ú<module>   s    