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o �h_. � @ s� d dl mZmZ d dlmZmZmZmZmZ d dl m Z d dl m Z d dl mZ d dlmZ dgZG dd� d�ZG d d � d e�Zd S ) � )� names_digest�split_identifier)�Col�ExpressionList�F�Func�OrderBy��Collate)�Q)�Query)� partition�Indexc @ sz e Zd ZdZdZddddddd�dd�Zedd � �Zd d � Zdd d�Z dd� Z dd� Z dd� Z dd� Z dd� Zdd� ZdS ) r �idx� � N)�fields�name� db_tablespace� opclasses� condition�includec G sn |r|st d��t|td �tf�st d��|r |s t d��t|ttf�s(t d��t|ttf�s3t d��|s;|s;t d��|rC|rCt d��|rK|sKt d��|rS|rSt d ��|rat|�t|�krat d ��|rptd d � |D ��spt d ��|rx|sxt d��t|td �ttf�s�t d��t|�| _dd� | jD �| _ |p�d| _ || _ || _ || _ |r�t|�nd| _tdd � |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 qd S �N)� isinstance�str)�.0�fieldr r �K/usr/local/CyberCP/lib/python3.10/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|dd� dfn|df�qS )�-� 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 qd 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\ ���� � �zIndex.__init__c C s t | j�S r )�boolr0 �r1 r r r �contains_expressionsO � zIndex.contains_expressionsc s` | j d u rd S t|dd�}|�| j �}|j� jd�}|�|� j�\}}|t� fdd�|D �� S )NF)�model� alias_cols)� connectionc 3 s � | ]}� � |�V qd S r )� quote_value)r �p�� schema_editorr r r Z r z+Index._get_condition_sql.<locals>.<genexpr>)r r � build_where� get_compilerr9 �as_sqlr, )r1 r7 r= �query�where�compiler�sql�paramsr r< r �_get_condition_sqlS s zIndex._get_condition_sqlr# c s� � fdd�| j D �}| �� |�}| jr:g }| jD ]}t|�} | �|j� |�| � qt|� �t � dd��} d } d } n"� fdd�| j D �} |jj j rRdd� | j D �} ndgt | j � } d } |j� f| | j|| j| | j||| d� |��S ) Nc s g | ] }� j �|�j�qS r ��_meta� get_field�columnr% �r7 r r r' ] s �z$Index.create_sql.<locals>.<listcomp>F)r8 c s g | ] \}}� j �|��qS r )rH rI )r r& �_rK r r r' m s ��c S s g | ]}|d �qS )r! r )r �orderr r r r' r � r# ) r r �usingr � col_suffixesr r r r0 )r rF r0 �IndexExpression�set_wrapper_classesr9 �appendr �resolve_expressionr r/ �features� supports_index_column_orderingr- �_create_index_sqlr r r ) r1 r7 r= rO �kwargsr r �index_expressionsr( �index_expressionr0 r rP r rK r � create_sql\ sJ � � � �� �zIndex.create_sqlc K s |j || jfi |��S r )�_delete_index_sqlr )r1 r7 r= rX r r r � remove_sql� s zIndex.remove_sqlc C s� d| j j| j jf }|�dd�}d| ji}| jr | j|d< | jd ur'| j|d< | jr/| j|d< | jr7| j|d< | j r?| j |d < || j |fS ) Nz%s.%szdjango.db.models.indexeszdjango.db.modelsr r r r r r ) � __class__� __module__�__name__�replacer r r r r r r0 )r1 �pathrX r r r � deconstruct� s zIndex.deconstructc C s | � � \}}}| j|i |��S )z Create a copy of this Index.)rc r^ )r1 rL �argsrX r r r �clone� s z Index.clonec s� t � jj�\}}� fdd�| jD �}dd� t|| j�D �}|g| | jg }d|dd� |d dd� d t|d d i�| jf f | _t| j�| j krNt d ��| jd d ks\| jd � � rhd| jdd� | _dS dS )a Generate a unique name for the index. The name is divided into 3 parts - table name (12 chars), field name (8 chars) and unique hash + suffix (10 chars). Each part is made to fit its size by truncating the excess length. c s g | ] \}}� j �|�j�qS r rG )r r& rM rK r r r' � s ��z-Index.set_name_with_model.<locals>.<listcomp>c S s$ g | ]\}\}}|r d nd| �qS )z-%sz%sr )r � column_namer& rM 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?rL zD%sr! ) r rH �db_tabler/ �zip�suffixr r r- �max_name_lengthr) �isdigit)r1 r7 rL � table_name� column_names�column_names_with_order� hash_datar rK r �set_name_with_model� s, ��� �� �zIndex.set_name_with_modelc C s� d| j j| js dndt| j� | jsdndt| j� | js dndt| j� | jd u r,dndt| j� | jd u r9dnd| j | jsBdndt| j� | j sOdf S 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) r^ � __qualname__r �reprr0 r r r r r r4 r r r �__repr__� s � � �zIndex.__repr__c C s | j |j kr| �� |�� kS tS r )r^ rc �NotImplemented)r1 �otherr r r �__eq__� s z Index.__eq__)r# )r` r_ ru rm rn r2 �propertyr5 rF r[ r] rc re rt rw rz r r r r r s( �> (# c sV e Zd ZdZdZeefZddd�Ze dd� �Z d� fd d � Z d d � Z � Z S )rQ z7Order and wrap expressions for CREATE INDEX statements.z%(expressions)sNc C s. |r|j jrtdd� | jD ��| _d S d S d S )Nc S s g | ]}|t ur|�qS r r �r � wrapper_clsr r r r' � s �z7IndexExpression.set_wrapper_classes.<locals>.<listcomp>)rU �collate_as_index_expressionr, �wrapper_classes)r1 r9 r r r rR � s � ��z#IndexExpression.set_wrapper_classesc G s || _ d S r )r )�clsr r r r �register_wrappers� r6 z!IndexExpression.register_wrappersTFc s^ t � �� �}t� fdd�|�\}}dd� |D �} t| �tt| ��kr1tdd�dd� � jD �� ��|dt|�d � |krLtd d�d d� � jD �� ��|d } | �|||||�} t | t �sdt | d d �} |r�t |� fd d�d�}dd� |D �}t |d d� �D ]\} } | �|| d g� q|d �| g� � �|d g� n� �| g� t� �|||||�S )Nc s t | � j�S r )r r )�er4 r r �<lambda>� s z4IndexExpression.resolve_expression.<locals>.<lambda>c S s g | ]}t |��qS r )r* �r �wrapperr r r r' � rN z6IndexExpression.resolve_expression.<locals>.<listcomp>zAMultiple references to %s can't be used in an indexed expression.z, c S � g | ]}|j �qS r �ru r| r r r r' � � r! z8%s must be topmost expressions in an indexed expression.c S r� r r� r| r r r r' r� z(%(expressions)s))�templatec s � j �t| ��S r )r �indexr* )�wr4 r r r� s )�keyc S s g | ]}|� � �qS r )�copyr� r r r r' rN ���r )r+ �flattenr r- �setr) �joinr rT r r r �sorted� enumerate�set_source_expressions�super)r1 rA � allow_joins�reuse� summarize�for_saver0 rY �wrappers� wrapper_types�root_expression�resolve_root_expression�ir� �r^ r4 r rT � s\ �������� � �z"IndexExpression.resolve_expressionc K s | j ||fi |��S r )r@ )r1 rC r9 � extra_contextr r r � as_sqlite% s zIndexExpression.as_sqliter )NTNFF)r` r_ ru �__doc__r� r r r rR � classmethodr� rT r� � __classcell__r r r� r rQ � s �=rQ N)�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 rQ r r r r �<module> s I
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