
    Hwg                     v    d Z ddlmZ ddlmZmZ  G d de      Z G d d      Z G d d	      Z	 G d
 d      Z
y)z]
Useful auxiliary data structures for query construction. Not useful outside
the SQL domain.
    )FullResultSet)INNERLOUTERc                       e Zd ZdZd Zy)	MultiJoinz
    Used by join construction code to indicate the point at which a
    multi-valued join was attempted (if the caller wants to treat that
    exceptionally).
    c                      || _         || _        y N)levelnames_with_path)self	names_pospath_with_namess      Z/var/www/horilla/myenv/lib/python3.12/site-packages/django/db/models/sql/datastructures.py__init__zMultiJoin.__init__   s    
.    N)__name__
__module____qualname____doc__r    r   r   r   r   	   s    /r   r   c                       e Zd Zy)EmptyN)r   r   r   r   r   r   r   r      s    r   r   c                   T    e Zd ZdZ	 ddZd Zd Zed        Zd Z	d Z
d	 Zd
 Zd Zy)Joina  
    Used by sql.Query and sql.SQLCompiler to generate JOIN clauses into the
    FROM entry. For example, the SQL generated could be
        LEFT OUTER JOIN "sometable" T1
        ON ("othertable"."sometable_id" = "sometable"."id")

    This class is primarily used in Query.alias_map. All entries in alias_map
    must be Join compatible by providing the following attributes and methods:
        - table_name (string)
        - table_alias (possible alias for the table, can be None)
        - join_type (can be None for those entries that aren't joined from
          anything)
        - parent_alias (which table is this join's parent, can be None similarly
          to join_type)
        - as_sql()
        - relabeled_clone()
    Nc                     || _         || _        || _        || _        |j	                         | _        || _        || _        || _        y r	   )	
table_nameparent_aliastable_alias	join_typeget_joining_columns	join_cols
join_fieldnullablefiltered_relation)r   r   r   r   r   r"   r#   r$   s           r   r   zJoin.__init__-   sJ     %(&" $779$ !2r   c                    g }g }|j                   }|j                  j                  }| j                  D ]M  \  }}|j	                   || j
                        d ||      d || j                        d ||             O | j                  j                  | j                  | j
                        }	|	r9|j                  |	      \  }
}|j	                  d|
z         |j                  |       | j                  rD	 |j                  | j                        \  }
}|j	                  d|
z         |j                  |       |s9t        | j                  d| j                        }t        d|j                  z        dj!                  |      }| j                  | j"                  k(  rdnd| j                  z  }| j$                  d	 || j"                        |d
|d}||fS # t        $ r Y w xY w)z
        Generate the full
           LEFT OUTER JOIN sometable ON sometable.somecol = othertable.othercol, params
        clause for this join.
        .z = z(%s)fieldzaJoin generated an empty ON clause. %s did not yield either joining columns or extra restrictions.z AND   %s z ON ())quote_name_unless_aliasops
quote_namer!   appendr   r   r"   get_extra_restrictioncompileextendr$   r   getattr
ValueError	__class__joinr   r   )r   compiler
connectionjoin_conditionsparamsqnqn2lhs_colrhs_col
extra_cond	extra_sqlextra_paramsdeclared_fieldon_clause_sql	alias_strsqls                   r   as_sqlzJoin.as_sqlG   s    --nn'' !% 		GW"" t(()Lt''(L		 __::d//

 &.&6&6z&B#I|""6I#56MM,'!!,*2*:*:4;Q;Q*R'	<  &&v	'9:l+$T__gtON9;I;S;ST   _5""doo5BEDDTDT<T 	 NNt	
 F{- ! s   ;G 	G+*G+c           	         |j                  | j                  | j                        }|j                  | j                  | j                        }| j                  T| j                  j	                         }| j                  j
                  D cg c]  }|j                  ||       c}|_        nd }| j                  | j                  ||| j                  | j                  | j                  |      S c c}w )N)r$   )getr   r   r$   clonepathr5   r   r   r"   r#   )r   
change_mapnew_parent_aliasnew_table_aliasr$   ps         r   relabeled_clonezJoin.relabeled_clone   s    %>>$*;*;T=N=NO$..)9)94;K;KL!!- $ 6 6 < < >.2.D.D.I.I&)*
q!$&" !%~~OONNOOMM/  
 	
&s   C/c                 t    | j                   | j                  | j                  | j                  | j                  fS r	   )r5   r   r   r"   r$   r   s    r   identityzJoin.identity   s5     NNOOOO""
 	
r   c                 `    t        |t              st        S | j                  |j                  k(  S r	   )
isinstancer   NotImplementedrR   r   others     r   __eq__zJoin.__eq__   s%    %&!!}}..r   c                 ,    t        | j                        S r	   hashrR   rQ   s    r   __hash__zJoin.__hash__       DMM""r   c                 @    | j                   d d |j                   d d k(  S )NrR   rV   s     r   equalszJoin.equals   s#    }}Sb!U^^CR%888r   c                 >    | j                  i       }t        |_        |S r	   )rO   r   r   r   news     r   demotezJoin.demote   s    ""2&
r   c                 >    | j                  i       }t        |_        |S r	   )rO   r   r   rc   s     r   promotezJoin.promote   s    ""2&
r   r	   )r   r   r   r   r   rF   rO   propertyrR   rX   r\   ra   re   rg   r   r   r   r   r      sI    4 349v
( 
 
/
#9
r   r   c                   P    e Zd ZdZdZdZdZd Zd Zd Z	e
d        Zd Zd Zd	 Zy)
	BaseTablez
    The BaseTable class is used for base table references in FROM clause. For
    example, the SQL "foo" in
        SELECT * FROM "foo" WHERE somecond
    could be generated by this class.
    Nc                      || _         || _        y r	   )r   r   )r   r   aliass      r   r   zBaseTable.__init__   s    $ r   c                     | j                   | j                  k(  rdnd| j                   z  }|j                  | j                        }||z   g fS )Nr(   r)   )r   r   r,   )r   r7   r8   rD   base_sqls        r   rF   zBaseTable.as_sql   sN    ""doo5BEDDTDT<T 	 33DOOD)#R''r   c                     | j                  | j                  |j                  | j                  | j                              S r	   )r5   r   rH   r   )r   rK   s     r   rO   zBaseTable.relabeled_clone   s3    ~~OOZ^^D,<,<d>N>NO
 	
r   c                 H    | j                   | j                  | j                  fS r	   )r5   r   r   rQ   s    r   rR   zBaseTable.identity   s    ~~t0@0@@@r   c                 `    t        |t              st        S | j                  |j                  k(  S r	   )rT   rj   rU   rR   rV   s     r   rX   zBaseTable.__eq__   s%    %+!!}}..r   c                 ,    t        | j                        S r	   rZ   rQ   s    r   r\   zBaseTable.__hash__   r]   r   c                 4    | j                   |j                   k(  S r	   r`   rV   s     r   ra   zBaseTable.equals   s    }}..r   )r   r   r   r   r   r   r$   r   rF   rO   rh   rR   rX   r\   ra   r   r   r   rj   rj      sM     IL!(

 A A/
#/r   rj   N)r   django.core.exceptionsr   django.db.models.sql.constantsr   r   	Exceptionr   r   r   rj   r   r   r   <module>rw      s?    1 8
/	 
/	 	Z Zz)/ )/r   