a
    Qh_.                     @   s   d dl mZmZ d dlmZmZmZmZmZ d dl	m
Z
 d dlmZ d dlmZ d dlmZ dgZG dd dZG d	d
 d
eZdS )    )names_digestsplit_identifier)ColExpressionListFFuncOrderByCollate)Q)Query)	partitionIndexc                   @   sz   e Zd ZdZdZdddddddddZedd	 Zd
d ZdddZ	dd Z
dd Zdd Zdd Zdd Zdd ZdS )r   idx    N)fieldsnamedb_tablespace	opclasses	conditionincludec                G   st  |r|st dt|td tfs*t d|r:|s:t dt|ttfsPt dt|ttfsft d|sv|svt d|r|rt d|r|st d|r|rt d	|rt|t|krt d
|rtdd |D st d|r|st dt|td ttfst dt|| _dd | jD | _	|p2d| _
|| _|| _|| _|rVt|nd| _tdd |D | _d S )Nz(An index must be named to use opclasses.z%Index.condition must be a Q instance.z(An index must be named to use condition.z%Index.fields must be a list or tuple.z(Index.opclasses must be a list or tuple.z@At least one field or expression is required to define an index.z4Index.fields and expressions are mutually exclusive.z*An index must be named to use expressions.zgIndex.opclasses cannot be used with expressions. Use django.contrib.postgres.indexes.OpClass() instead.zGIndex.fields and Index.opclasses must have the same number of elements.c                 s   s   | ]}t |tV  qd S N)
isinstancestr).0fieldr   r   Q/var/www/sistema_ama/venv/lib/python3.9/site-packages/django/db/models/indexes.py	<genexpr>9       z!Index.__init__.<locals>.<genexpr>z8Index.fields must contain only strings with field names.zA covering index must be named.z&Index.include must be a list or tuple.c                 S   s.   g | ]&}| d r"|dd dfn|dfqS )-   NDESC )
startswithr   
field_namer   r   r   
<listcomp>A   s   z"Index.__init__.<locals>.<listcomp>r#   r   c                 s   s$   | ]}t |trt|n|V  qd S r   )r   r   r   )r   
expressionr   r   r   r   J   s   )
ValueErrorr   typer   listtuplelenallr   fields_ordersr   r   r   r   r   expressions)selfr   r   r   r   r   r   r0   r   r   r   __init__   s\    

zIndex.__init__c                 C   s
   t | jS r   )boolr0   r1   r   r   r   contains_expressionsO   s    zIndex.contains_expressionsc                    s`   | j d u rd S t|dd}|| j }|j jd}|| j\}}|t fdd|D  S )NF)model
alias_cols)
connectionc                 3   s   | ]}  |V  qd S r   )quote_value)r   pschema_editorr   r   r   Z   r   z+Index._get_condition_sql.<locals>.<genexpr>)r   r   build_whereget_compilerr8   as_sqlr,   )r1   r6   r<   querywherecompilersqlparamsr   r;   r   _get_condition_sqlS   s    
zIndex._get_condition_sqlr#   c                    s    fdd| j D }|  |}| jrtg }| jD ]"}t|}	|	|j ||	 q0t| t	 dd}
d }d }nD fdd| j
D }|jjjrdd | j
D }ndgt| j
 }d }
|j f|| j|| j|| j|||
d	|S )	Nc                    s   g | ]} j |jqS r   _meta	get_fieldcolumnr%   r6   r   r   r'   ]   s   z$Index.create_sql.<locals>.<listcomp>F)r7   c                    s   g | ]\}} j |qS r   )rG   rH   )r   r&   _rJ   r   r   r'   m   s   c                 S   s   g | ]}|d  qS )r!   r   )r   orderr   r   r   r'   r   r   r#   )	r   r   usingr   col_suffixesr   r   r   r0   )r   rE   r0   IndexExpressionset_wrapper_classesr8   appendr   resolve_expressionr   r/   featuresZsupports_index_column_orderingr-   Z_create_index_sqlr   r   r   )r1   r6   r<   rM   kwargsr   r   index_expressionsr(   index_expressionr0   r   rN   r   rJ   r   
create_sql\   sJ    




zIndex.create_sqlc                 K   s   |j || jfi |S r   )Z_delete_index_sqlr   )r1   r6   r<   rT   r   r   r   
remove_sql   s    zIndex.remove_sqlc                 C   s   d| j j| j jf }|dd}d| ji}| jr:| j|d< | jd urN| j|d< | jr^| j|d< | jrn| j|d< | j	r~| j	|d	< || j
|fS )
Nz%s.%szdjango.db.models.indexeszdjango.db.modelsr   r   r   r   r   r   )	__class__
__module____name__replacer   r   r   r   r   r   r0   )r1   pathrT   r   r   r   deconstruct   s    






zIndex.deconstructc                 C   s   |   \}}}| j|i |S )zCreate a copy of this Index.)r^   rY   )r1   rK   argsrT   r   r   r   clone   s    zIndex.clonec                    s   t  jj\}} fdd| jD }dd t|| jD }|g| | jg }d|dd |d dd d	t|d
di| jf f | _t| j| j	krt
d| jd dks| jd  rd| jdd  | _dS )a  
        Generate a unique name for the index.

        The name is divided into 3 parts - table name (12 chars), field name
        (8 chars) and unique hash + suffix (10 chars). Each part is made to
        fit its size by truncating the excess length.
        c                    s   g | ]\}} j |jqS r   rF   )r   r&   rL   rJ   r   r   r'      s   z-Index.set_name_with_model.<locals>.<listcomp>c                 S   s$   g | ]\}\}}|rd nd| qS )z-%sz%sr   )r   column_namer&   rL   r   r   r   r'      s   
z%s_%s_%sN   r      z%s_%slength   zVIndex too long for multiple database support. Is self.suffix longer than 3 characters?rK   zD%sr!   )r   rG   db_tabler/   zipsuffixr   r   r-   max_name_lengthr)   isdigit)r1   r6   rK   Z
table_nameZcolumn_namesZcolumn_names_with_orderZ	hash_datar   rJ   r   set_name_with_model   s*    

zIndex.set_name_with_modelc                 C   s   d| j j| jsdndt| j | js(dndt| j | js>dndt| j | jd u rXdndt| j | jd u rrdnd| j | jsdndt| j | j	sdnd	t| j	 f S )
Nz<%s:%s%s%s%s%s%s%s>r#   z
 fields=%sz expressions=%sz name=%sz db_tablespace=%sz condition=%sz include=%sz opclasses=%s)
rY   __qualname__r   reprr0   r   r   r   r   r   r4   r   r   r   __repr__   s    zIndex.__repr__c                 C   s    | j |j kr|  | kS tS r   )rY   r^   NotImplemented)r1   otherr   r   r   __eq__   s    zIndex.__eq__)r#   )r[   rZ   rl   rh   ri   r2   propertyr5   rE   rW   rX   r^   r`   rk   rn   rq   r   r   r   r   r      s&   >
	
(#c                       sL   e Zd ZdZdZeefZdddZe	dd Z
d fd
d	Zdd Z  ZS )rO   z7Order and wrap expressions for CREATE INDEX statements.z%(expressions)sNc                 C   s&   |r"|j jr"tdd | jD | _d S )Nc                 S   s   g | ]}|t ur|qS r   r	   r   Zwrapper_clsr   r   r   r'      s   z7IndexExpression.set_wrapper_classes.<locals>.<listcomp>)rS   Zcollate_as_index_expressionr,   wrapper_classes)r1   r8   r   r   r   rP      s    z#IndexExpression.set_wrapper_classesc                 G   s
   || _ d S r   )rt   )clsrt   r   r   r   register_wrappers   s    z!IndexExpression.register_wrappersTFc                    sb  t   }t fdd|\}}dd |D }	t|	tt|	krbtdddd  jD  |dt|d  |krtd	dd
d  jD  |d }
|
|||||}t	|t
st|
dd}
|rBt| fddd}dd |D }t|d d D ]\}}|||d  g q |d |
g  |d g n |
g t |||||S )Nc                    s   t |  jS r   )r   rt   )er4   r   r   <lambda>   r   z4IndexExpression.resolve_expression.<locals>.<lambda>c                 S   s   g | ]}t |qS r   )r*   r   wrapperr   r   r   r'      r   z6IndexExpression.resolve_expression.<locals>.<listcomp>zAMultiple references to %s can't be used in an indexed expression.z, c                 S   s   g | ]
}|j qS r   rl   rs   r   r   r   r'      r   r!   z8%s must be topmost expressions in an indexed expression.c                 S   s   g | ]
}|j qS r   r{   rs   r   r   r   r'     r   z(%(expressions)s))templatec                    s    j t| S r   )rt   indexr*   )wr4   r   r   rx     r   )keyc                 S   s   g | ]}|  qS r   )copyry   r   r   r   r'     r   r   )r+   flattenr   r-   setr)   joinrt   rR   r   r   r   sorted	enumerateset_source_expressionssuper)r1   r@   allow_joinsreuse	summarizefor_saver0   rU   ZwrappersZwrapper_typesZroot_expressionZresolve_root_expressionirz   rY   r4   r   rR      s\    



z"IndexExpression.resolve_expressionc                 K   s   | j ||fi |S r   )r?   )r1   rB   r8   extra_contextr   r   r   	as_sqlite%  s    zIndexExpression.as_sqlite)N)NTNFF)r[   rZ   rl   __doc__r|   r   r
   rt   rP   classmethodrv   rR   r   __classcell__r   r   r   r   rO      s   

     =rO   N)Zdjango.db.backends.utilsr   r   django.db.models.expressionsr   r   r   r   r   django.db.models.functionsr
   django.db.models.query_utilsr   django.db.models.sqlr   django.utils.functionalr   __all__r   rO   r   r   r   r   <module>   s    I