o
    lf                     @   s   d Z ddlmZ G dd dZG dd deZG dd deZG d	d
 d
eZG dd deZG dd deZG dd deZ	G dd deZ
G dd deZdS )z~
Helpers to manipulate deferred DDL statements that might need to be adjusted or
discarded within when executing a migration.
    )deepcopyc                   @   @   e Zd ZdZdd Zdd Zdd Zdd	 Zd
d Zdd Z	dS )	Referencez0Base class that defines the reference interface.c                 C      dS )zU
        Return whether or not this instance references the specified table.
        F selftabler   r   e/var/www/ticemtrilhas/avaliacao_env/lib/python3.10/site-packages/django/db/backends/ddl_references.pyreferences_table      zReference.references_tablec                 C   r   )zV
        Return whether or not this instance references the specified column.
        Fr   r   r	   columnr   r   r
   references_column   r   zReference.references_columnc                 C   r   )zI
        Rename all references to the old_name to the new_table.
        Nr   r   	old_table	new_tabler   r   r
   rename_table_references   r   z!Reference.rename_table_referencesc                 C   r   )zL
        Rename all references to the old_column to the new_column.
        Nr   r   r	   
old_column
new_columnr   r   r
   rename_column_references   r   z"Reference.rename_column_referencesc                 C   s   d| j jt| f S )Nz<%s %r>)	__class____name__strr   r   r   r
   __repr__#      zReference.__repr__c                 C   s   t d)Nz>Subclasses must define how they should be converted to string.)NotImplementedErrorr   r   r   r
   __str__&   s   zReference.__str__N)
r   
__module____qualname____doc__r   r   r   r   r   r   r   r   r   r
   r      s    r   c                   @   s0   e Zd ZdZdd Zdd Zdd Zdd	 Zd
S )TablezHold a reference to a table.c                 C      || _ || _d S N)r	   
quote_name)r   r	   r&   r   r   r
   __init__/      
zTable.__init__c                 C   s
   | j |kS r%   r	   r   r   r   r
   r   3   s   
zTable.references_tablec                 C   s   | j |kr
|| _ d S d S r%   r)   r   r   r   r
   r   6   s   

zTable.rename_table_referencesc                 C   s   |  | jS r%   )r&   r	   r   r   r   r
   r   :      zTable.__str__N)r   r    r!   r"   r'   r   r   r   r   r   r   r
   r#   ,   s    r#   c                   @   s(   e Zd ZdZdd Zdd Zdd ZdS )	TableColumnsz9Base class for references to multiple columns of a table.c                 C   r$   r%   r	   columns)r   r	   r-   r   r   r
   r'   A   r(   zTableColumns.__init__c                 C   s   | j |ko	|| jv S r%   r,   r   r   r   r
   r   E   r   zTableColumns.references_columnc                 C   s8   | j |krt| jD ]\}}||kr|| j|< q
d S d S r%   )r	   	enumerater-   )r   r	   r   r   indexr   r   r   r
   r   H   s   

z%TableColumns.rename_column_referencesN)r   r    r!   r"   r'   r   r   r   r   r   r
   r+   >   s
    r+   c                       s*   e Zd ZdZd fdd	Zdd Z  ZS )Columnsz(Hold a reference to one or many columns.r   c                       || _ || _t || d S r%   )r&   col_suffixessuperr'   )r   r	   r-   r&   r2   r   r   r
   r'   R      zColumns.__init__c                    *   fdd d  fddtjD S )Nc                    sF     | }z j| }|rd||}W |S W |S  ty"   Y |S w Nz{} {})r&   r2   format
IndexErrorr   idxcolsuffixr   r   r
   col_strX   s   

z Columns.__str__.<locals>.col_str, c                 3       | ]
\}} ||V  qd S r%   r   .0r;   r   r>   r   r
   	<genexpr>b       
z"Columns.__str__.<locals>.<genexpr>joinr.   r-   r   r   r>   r   r
   r   W   s   
zColumns.__str__)r   r   r    r!   r"   r'   r   __classcell__r   r   r4   r
   r0   O   s    r0   c                       s(   e Zd ZdZ fddZdd Z  ZS )	IndexNamez"Hold a reference to an index name.c                    r1   r%   )r=   create_index_namer3   r'   )r   r	   r-   r=   rL   r4   r   r
   r'   j   r5   zIndexName.__init__c                 C   s   |  | j| j| jS r%   )rL   r	   r-   r=   r   r   r   r
   r   o   r   zIndexName.__str__rI   r   r   r4   r
   rK   g   s    rK   c                       s&   e Zd Zd fdd	Zdd Z  ZS )IndexColumnsr   c                    s   || _ t |||| d S r%   )	opclassesr3   r'   )r   r	   r-   r&   r2   rN   r4   r   r
   r'   t   s   zIndexColumns.__init__c                    r6   )Nc                    sT   d  |  j| }z j| }|rd ||}W |S W |S  ty)   Y |S w r7   )r8   r&   rN   r2   r9   r:   r   r   r
   r>   y   s   
z%IndexColumns.__str__.<locals>.col_strr?   c                 3   r@   r%   r   rA   rC   r   r
   rD      rE   z'IndexColumns.__str__.<locals>.<genexpr>rF   r   r   rH   r
   r   x   s   zIndexColumns.__str__)r   r   )r   r    r!   r'   r   rJ   r   r   r4   r
   rM   s   s    rM   c                       sX   e Zd ZdZ fddZ fddZ fddZ fdd	Z fd
dZdd Z	  Z
S )ForeignKeyNamez'Hold a reference to a foreign key name.c                    s*   t ||| _|| _|| _t || d S r%   )r+   to_referencesuffix_templatecreate_fk_namer3   r'   )r   
from_tablefrom_columnsto_table
to_columnsrQ   rR   r4   r   r
   r'      s   	zForeignKeyName.__init__c                    s   t  |p| j|S r%   )r3   r   rP   r   r4   r   r
   r      s   zForeignKeyName.references_tablec                    s   t  ||p| j||S r%   )r3   r   rP   r   r4   r   r
   r      s
   z ForeignKeyName.references_columnc                    s    t  || | j|| d S r%   )r3   r   rP   r   r4   r   r
   r      s   z&ForeignKeyName.rename_table_referencesc                    s$   t  ||| | j||| d S r%   )r3   r   rP   r   r4   r   r
   r      s   z'ForeignKeyName.rename_column_referencesc                 C   s.   | j | jj| jjd d }| | j| j|S )Nr   )rU   	to_column)rQ   rP   r	   r-   rR   )r   r=   r   r   r
   r      s
   
zForeignKeyName.__str__)r   r    r!   r"   r'   r   r   r   r   r   rJ   r   r   r4   r
   rO      s    rO   c                   @   r   )	Statementz
    Statement template and formatting parameters container.

    Allows keeping a reference to a statement without interpolating identifiers
    that might have to be adjusted if they're referencing a table or column
    that is removed
    c                 K   r$   r%   templateparts)r   rZ   r[   r   r   r
   r'      r(   zStatement.__init__c                    s   t  fdd| j D S )Nc                 3   s$    | ]}t |d o| V  qdS )r   N)hasattrr   rB   partr)   r   r
   rD      s
    
z-Statement.references_table.<locals>.<genexpr>anyr[   valuesr   r   r)   r
   r      s   zStatement.references_tablec                    s   t  fdd| j D S )Nc                 3   s&    | ]}t |d o| V  qdS )r   N)r\   r   r]   r   r	   r   r
   rD      s
    
z.Statement.references_column.<locals>.<genexpr>r_   r   r   rb   r
   r      s   zStatement.references_columnc                 C   s*   | j  D ]}t|dr||| qd S )Nr   )r[   ra   r\   r   )r   r   r   r^   r   r   r
   r      s
   
z!Statement.rename_table_referencesc                 C   s,   | j  D ]}t|dr|||| qd S )Nr   )r[   ra   r\   r   )r   r	   r   r   r^   r   r   r
   r      s
   
z"Statement.rename_column_referencesc                 C   s   | j | j S r%   rY   r   r   r   r
   r      r*   zStatement.__str__N)
r   r    r!   r"   r'   r   r   r   r   r   r   r   r   r
   rX      s    rX   c                       s8   e Zd Z fddZ fddZdd Zdd Z  ZS )	Expressionsc                    s@   || _ || _|| _dd | j j| jgD }t || d S )Nc                 S   s   g | ]}|j jqS r   )targetr   )rB   r<   r   r   r
   
<listcomp>   s    z(Expressions.__init__.<locals>.<listcomp>)compilerexpressionsquote_valuequery	_gen_colsr3   r'   )r   r	   rg   rf   rh   r-   r4   r   r
   r'      s   zExpressions.__init__c                    s2   | j |krd S | j||i| _t || d S r%   )r	   rg   relabeled_cloner3   r   r   r4   r   r
   r      s   
z#Expressions.rename_table_referencesc                 C   sb   | j |krd S t| j}g | _| jj|gD ]}|jj|kr#||j_| j	|jj q|| _d S r%   )
r	   r   rg   r-   rf   ri   rj   rd   r   append)r   r	   r   r   rg   r<   r   r   r
   r      s   


z$Expressions.rename_column_referencesc                 C   s*   | j | j\}}t| j|}|t| S r%   )rf   compilerg   maprh   tuple)r   sqlparamsr   r   r
   r      s   zExpressions.__str__)r   r    r!   r'   r   r   r   rJ   r   r   r4   r
   rc      s
    
rc   N)r"   copyr   r   r#   r+   r0   rK   rM   rO   rX   rc   r   r   r   r
   <module>   s    $.'