o
    lf%                     @   s@   d dl mZ d dlmZmZmZ d dlmZ G dd deZdS )    )BaseDatabaseSchemaEditor)NOT_PROVIDEDFUniqueConstraint)
LOOKUP_SEPc                       s"  e Zd ZdZdZdZdZdZdZdZ	dZ
d	Zd
ZdZdZdZdZdZdZedd Ze fddZdd Zdd Zdd Zdd Zedd Z fdd Z fd!d"Z fd#d$Z fd%d&Z fd'd(Zdd)d*d+Z  fd,d-Z!d.d/ Z" fd0d1Z# fd2d3Z$d4d5 Z% fd6d7Z&  Z'S )8DatabaseSchemaEditorz+RENAME TABLE %(old_table)s TO %(new_table)szMODIFY %(column)s %(type)s NULLz#MODIFY %(column)s %(type)s NOT NULLz2MODIFY %(column)s %(type)s%(collation)s%(comment)sz(ALTER COLUMN %(column)s SET DEFAULT NULLz,ALTER TABLE %(table)s DROP COLUMN %(column)sz)ALTER TABLE %(table)s DROP INDEX %(name)szY, ADD CONSTRAINT %(name)s FOREIGN KEY (%(column)s) REFERENCES %(to_table)s(%(to_column)s)z/ALTER TABLE %(table)s DROP FOREIGN KEY %(name)sz DROP INDEX %(name)s ON %(table)sz?ALTER TABLE %(table)s RENAME INDEX %(old_name)s TO %(new_name)szGALTER TABLE %(table)s ADD CONSTRAINT %(name)s PRIMARY KEY (%(columns)s)z&ALTER TABLE %(table)s DROP PRIMARY KEYz9CREATE INDEX %(name)s ON %(table)s (%(columns)s)%(extra)sz+ALTER TABLE %(table)s COMMENT = %(comment)sNc                 C   s   | j jrdS dS )Nz8ALTER TABLE %(table)s DROP CONSTRAINT IF EXISTS %(name)sz)ALTER TABLE %(table)s DROP CHECK %(name)s)
connectionmysql_is_mariadbself r   c/var/www/ticemtrilhas/avaliacao_env/lib/python3.10/site-packages/django/db/backends/mysql/schema.pysql_delete_check%   s   z%DatabaseSchemaEditor.sql_delete_checkc                    s8   | j jr| j jdkrt jS dS | j jdkrt jS dS )N)
         )   r      zCALTER TABLE %(table)s CHANGE %(old_column)s %(new_column)s %(type)s)r   r	   mysql_versionsupersql_rename_columnr
   	__class__r   r   r   .   s   z&DatabaseSchemaEditor.sql_rename_columnc                 C   sV   | j   t|tr|dd}| j j || j j j}t|tr)t|tr)| }|S )N%z%%)	r   ensure_connection
isinstancestrreplaceescapeencodersbytesdecode)r   valuequotedr   r   r   quote_value9   s   


z DatabaseSchemaEditor.quote_valuec                 C   s$   | | j}|d uo| | jjv S N)db_typer   lower_limited_data_types)r   fieldr&   r   r   r   _is_limited_data_typeE   s   z*DatabaseSchemaEditor._is_limited_data_typec                 C   s   | j s| |S dS )NF)$_supports_limited_data_type_defaultsr*   r   r)   r   r   r   skip_defaultL   s   
z!DatabaseSchemaEditor.skip_defaultc                 C   s   |  |r| jjsdS dS )NTF)r*   r   r	   r,   r   r   r   skip_default_on_alterQ   s   z*DatabaseSchemaEditor.skip_default_on_alterc                 C   s   | j jrdS | j jdkS )NT)r   r      )r   r	   r   r
   r   r   r   r+   X   s   z9DatabaseSchemaEditor._supports_limited_data_type_defaultsc                    s(   | j js| jr| |rdS t |S )Nz(%s))r   r	   r+   r*   r   _column_default_sqlr,   r   r   r   r0   _   s   z(DatabaseSchemaEditor._column_default_sqlc                    sf   t  || | |r/|jd tfvr1| |}| d| |jj	| |j
d |g d S d S d S )Nz%UPDATE %(table)s SET %(column)s = %%s)tablecolumn)r   	add_fieldr-   defaultr   effective_defaultexecute
quote_name_metadb_tabler2   )r   modelr)   r5   r   r   r   r3   j   s   

zDatabaseSchemaEditor.add_fieldc                    s@   t |tr||| d ur| j||j|jd t || d S )Nfieldsexpressions)r   r   
create_sql_create_missing_fk_indexr<   r=   r   remove_constraint)r   r:   
constraintr   r   r   r@   z   s   z&DatabaseSchemaEditor.remove_constraintc                    s0   | j |dd |jD |jd t || d S )Nc                 S   s   g | ]\}}|qS r   r   ).0
field_name_r   r   r   
<listcomp>   s    z5DatabaseSchemaEditor.remove_index.<locals>.<listcomp>r;   )r?   fields_ordersr=   r   remove_index)r   r:   indexr   r   r   rG      s   z!DatabaseSchemaEditor.remove_indexc                    sV   t  ||s	dS | jj| j |jj}|dkr%| dkr%|j	r%dS | 
| S )NFInnoDB
ForeignKey)r   _field_should_be_indexedr   introspectionget_storage_enginecursorr8   r9   get_internal_typedb_constraintr*   )r   r:   r)   storager   r   r   rK      s   z-DatabaseSchemaEditor._field_should_be_indexed)r=   c                   s   d}|r	|d }n|r#| j jjr#t|d tr#t|d jvr#|d j}|s'dS |j|}|	 dkrw| j j
|j | j  } fdd| j j
||jj D }W d   n1 s^w   Y  t|dkry| | j||gdd dS dS dS )	a  
        MySQL can remove an implicit FK index on a field when that field is
        covered by another index like a unique_together. "covered" here means
        that the more complex index has the FK field as its first field (see
        https://bugs.mysql.com/bug.php?id=37910).

        Manually create an implicit FK index to make it possible to remove the
        composed index.
        Nr   rJ   c                    s,   g | ]\}}|d  r|d d  kr|qS )rH   columnsr   r   )rB   nameinfodictr2   r   r   rE      s    zADatabaseSchemaEditor._create_missing_fk_index.<locals>.<listcomp>    )r<   suffix)r   featuressupports_expression_indexesr   r   r   rS   r8   	get_fieldrO   rL   identifier_converterr2   rN   get_constraintsr9   itemslenr6   _create_index_sql)r   r:   r<   r=   first_field_namefirst_fieldrN   constraint_namesr   rU   r   r?      s@   



z-DatabaseSchemaEditor._create_missing_fk_indexc                    s$   | j ||d t j||g|R  S )N)r<   )r?   r   _delete_composed_index)r   r:   r<   argsr   r   r   rd      s   z+DatabaseSchemaEditor._delete_composed_indexc                 C   s   |j r	|d7 }|S |d7 }|S )zt
        Keep the null property of the old field. If it has changed, it will be
        handled separately.
        z NULLz	 NOT NULL)null)r   r)   new_typer   r   r   _set_field_new_type_null_status   s
   z4DatabaseSchemaEditor._set_field_new_type_null_statusc                    s"   |  ||}t ||||||S r%   )rh   r   _alter_column_type_sql)r   r:   	old_field	new_fieldrg   old_collationnew_collationr   r   r   ri      s   z+DatabaseSchemaEditor._alter_column_type_sqlc                    s   |  ||}t ||||S r%   )rh   r   _rename_field_sql)r   r1   rj   rk   rg   r   r   r   rn      s   z&DatabaseSchemaEditor._rename_field_sqlc                 C   s   dg fS )NrW   r   )r   r:   rk   rg   new_db_commentr   r   r   _alter_column_comment_sql   s   z.DatabaseSchemaEditor._alter_column_comment_sqlc                    s   t  |}d| S )Nz	 COMMENT )r   _comment_sql)r   commentcomment_sqlr   r   r   rq      s   
z!DatabaseSchemaEditor._comment_sql)(__name__
__module____qualname__sql_rename_tablesql_alter_column_nullsql_alter_column_not_nullsql_alter_column_type sql_alter_column_no_default_nullsql_delete_columnsql_delete_uniquesql_create_column_inline_fksql_delete_fksql_delete_indexsql_rename_indexsql_create_pksql_delete_pksql_create_indexsql_alter_table_commentsql_alter_column_commentpropertyr   r   r$   r*   r-   r.   r+   r0   r3   r@   rG   rK   r?   rd   rh   ri   rn   rp   rq   __classcell__r   r   r   r   r      sT    


2r   N)	django.db.backends.base.schemar   django.db.modelsr   r   r   django.db.models.constantsr   r   r   r   r   r   <module>   s    