o
    b*"                     @   sp   d Z ddlmZ ddlmZ ddlmZ dZdZG dd dej	Z
G d	d
 d
ZG dd dZG dd dZdS )zG
Code to manage the creation and SQL rendering of 'where' constraints.
    EmptyResultSet)tree)cached_propertyANDORc                   @   s   e Zd ZdZeZdZdZd'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edd Zedd Zedd Zedd Zedd  Zed!d" Zed#d$ Zd%d& ZdS ))	WhereNodea  
    An SQL WHERE clause.

    The class is tied to the Query class that created it (in order to create
    the correct SQL).

    A child is usually an expression producing boolean values. Most likely the
    expression is a Lookup instance.

    However, a child could also be any class with as_sql() and either
    relabeled_clone() method or relabel_aliases() and clone() methods and
    contains_aggregate attribute.
    FTc                 C   s   | j s| dfS || jA }|r| jtkp| o| jtk}|r$| j r$d| fS g }g }| jD ]/}t|drL||\}}|durB|| |durK|| q+|j rU|| q+|| q+|rf| 	|| j| jnd}	|rs| 	|| j| jnd}
|
|	fS )z
        Return two possibly None nodes: one for those parts of self that
        should be included in the WHERE clause and one for those parts of
        self that must be included in the HAVING clause.
        Nsplit_having)
contains_aggregatenegated	connectorr   r   childrenhasattrr	   append	__class__)selfr   Z
in_negatedZmay_need_splitZwhere_partsZhaving_partscZ
where_partZhaving_partZhaving_nodeZ
where_node r   Y/var/www/secure340b-portal/env/lib/python3.10/site-packages/django/db/models/sql/where.pyr	       s0   





zWhereNode.split_havingc              	   C   s  g }g }| j tkrt| jd}}ndt| j}}| jD ]H}z	||\}}	W n ty5   |d8 }Y nw |rC|| ||	 n|d8 }|dkrV| jrTdg f  S t|dkre| jr_tdg f  S qd| j  }
|
	|}|r| jr}d| }||fS t|dks| j
rd| }||fS )a  
        Return the SQL version of the where clause and the value to be
        substituted in. Return '', [] if this node matches everything,
        None, [] if this node is empty, and raise EmptyResultSet if this
        node can't match anything.
           r    z %s zNOT (%s)(%s))r   r   lenr   compiler   r   extendr   joinresolved)r   compiler
connectionresultZresult_paramsZfull_neededZempty_neededchildsqlparamsconnZ
sql_stringr   r   r   as_sqlA   sB   




zWhereNode.as_sqlNc                 C   s"   g }| j D ]	}||  q|S N)r   r   get_group_by_cols)r   aliascolsr    r   r   r   r&   u   s   
zWhereNode.get_group_by_colsc                 C   s   | j d d  S r%   )r   r   r   r   r   get_source_expressions{   s   z WhereNode.get_source_expressionsc                 C   s    t |t | jksJ || _d S r%   )r   r   )r   r   r   r   r   set_source_expressions~   s   
z WhereNode.set_source_expressionsc                 C   sH   t | jD ]\}}t|dr|| qt|dr!||| j|< qdS )z
        Relabel the alias values of any children. 'change_map' is a dictionary
        mapping old (current) alias values to the new values.
        relabel_aliasesrelabeled_cloneN)	enumerater   r   r,   r-   )r   
change_mapposr    r   r   r   r,      s   

zWhereNode.relabel_aliasesc                 C   sN   | j jg | j| jd}| jD ]}t|dr|j|  q|j| q|S )z
        Create a clone of the tree. Must only be called on root nodes (nodes
        with empty subtree_parents). Childs must be either (Constraint, lookup,
        value) tuples, or objects supporting .clone().
        )r   r   r   clone)r   Z_new_instancer   r   r   r   r   r1   )r   r1   r    r   r   r   r1      s   


zWhereNode.clonec                 C   s   |   }|| |S r%   )r1   r,   )r   r/   r1   r   r   r   r-      s   
zWhereNode.relabeled_clonec                 C   s   |   S r%   )r1   r)   r   r   r   copy   s   zWhereNode.copyc                    *   t |tjrt fdd|jD S |jS )Nc                 3       | ]}  |V  qd S r%   _contains_aggregate.0r   clsr   r   	<genexpr>       z0WhereNode._contains_aggregate.<locals>.<genexpr>)
isinstancer   Nodeanyr   r
   r:   objr   r9   r   r6         zWhereNode._contains_aggregatec                 C   
   |  | S r%   r5   r)   r   r   r   r
         
zWhereNode.contains_aggregatec                    r3   )Nc                 3   r4   r%   _contains_over_clauser7   r9   r   r   r;      r<   z2WhereNode._contains_over_clause.<locals>.<genexpr>)r=   r   r>   r?   r   contains_over_clauser@   r   r9   r   rF      rB   zWhereNode._contains_over_clausec                 C   rC   r%   rE   r)   r   r   r   rG      rD   zWhereNode.contains_over_clausec                 C   s   t dd | jD S )Nc                 s   s    | ]}|j V  qd S r%   )
is_summary)r8   r    r   r   r   r;      s    z'WhereNode.is_summary.<locals>.<genexpr>)r?   r   r)   r   r   r   rH      s   zWhereNode.is_summaryc                 O   s&   t | dr| j|g|R i |} | S )Nresolve_expression)r   rI   )exprqueryargskwargsr   r   r   _resolve_leaf   s   
zWhereNode._resolve_leafc                 O   s   t |dr|jD ]}| j||g|R i | qt |dr,| j|j|g|R i ||_t |drB| j|j|g|R i ||_d S d S )Nr   lhsrhs)r   r   _resolve_noderN   rO   rP   )r:   noderK   rL   rM   r    r   r   r   rQ      s   



"zWhereNode._resolve_nodec                 O   s*   |   }|j|g|R i | d|_|S )NT)r1   rQ   r   )r   rL   rM   r1   r   r   r   rI      s   zWhereNode.resolve_expression)Fr%   )__name__
__module____qualname____doc__r   defaultr   Zconditionalr	   r$   r&   r*   r+   r,   r1   r-   r2   classmethodr6   r   r
   rF   rG   propertyrH   staticmethodrN   rQ   rI   r   r   r   r   r      s:    
!
4






	r   c                   @   s   e Zd ZdZdZdddZdS )NothingNodezA node that matches nothing.FNc                 C   s   t r%   r   )r   r   r   r   r   r   r$      s   zNothingNode.as_sqlNN)rS   rT   rU   rV   r
   r$   r   r   r   r   r[      s    r[   c                   @   s"   e Zd ZdZdd ZdddZdS )
ExtraWhereFc                 C   s   || _ || _d S r%   )sqlsr"   )r   r^   r"   r   r   r   __init__   s   
zExtraWhere.__init__Nc                 C   s(   dd | j D }d|t| jpdfS )Nc                 S   s   g | ]}d | qS )r   r   )r8   r!   r   r   r   
<listcomp>   s    z%ExtraWhere.as_sql.<locals>.<listcomp>z AND r   )r^   r   listr"   )r   r   r   r^   r   r   r   r$      s   zExtraWhere.as_sqlr\   rS   rT   rU   r
   r_   r$   r   r   r   r   r]      s    r]   c                   @   s    e Zd ZdZdd Zdd ZdS )SubqueryConstraintFc                 C   s   || _ || _|| _|| _d S r%   )r'   columnstargetsquery_object)r   r'   rd   re   rf   r   r   r   r_      s   
zSubqueryConstraint.__init__c                 C   s0   | j }|| j |j|d}|| j| j|S )N)r   )rf   Z
set_valuesre   Zget_compilerZas_subquery_conditionr'   rd   )r   r   r   rK   Zquery_compilerr   r   r   r$      s   zSubqueryConstraint.as_sqlNrb   r   r   r   r   rc      s    rc   N)rV   Zdjango.core.exceptionsr   Zdjango.utilsr   Zdjango.utils.functionalr   r   r   r>   r   r[   r]   rc   r   r   r   r   <module>   s     G