o
    ˷ez5                     @   s   d dl mZ d dlZd dlmZ d dlmZ d dlmZ d dlm	Z	 d dl
mZ d dlmZ ed	ejd
 ZeddZG dd deZdS )    )
namedtupleN)
FIELD_TYPE)BaseDatabaseIntrospection)	FieldInfo)	TableInfo)Index)
OrderedSetr   )extrais_unsignedhas_json_constraintInfoLinezXcol_name data_type max_len num_prec num_scale extra column_default collation is_unsignedc                	       s   e Zd Zi ejdejdejdejdejdej	dej
dejdejdejdejdejd	ejd
ejdejdejdejdejdejdejdejdiZ fddZdd Zdd ZdddZdd Zdd Zdd Z dd Z!  Z"S )DatabaseIntrospection	TextField	CharFieldDecimalField	DateFieldDateTimeField
FloatFieldIntegerField	JSONFieldBigIntegerFieldSmallIntegerField	TimeFieldc                    st   t  ||}d|jv r|dkrdS |dkrdS |dkrdS |jr3|dkr'dS |dkr-d	S |dkr3d
S |jr8dS |S )Nauto_incrementr   	AutoFieldr   BigAutoFieldr   SmallAutoFieldPositiveBigIntegerFieldPositiveIntegerFieldPositiveSmallIntegerFieldr   )superget_field_typer	   r
   r   )self	data_typedescription
field_type	__class__ ]/var/www/ideatree/venv/lib/python3.10/site-packages/django/db/backends/mysql/introspection.pyr!   /   s$   
z$DatabaseIntrospection.get_field_typec                 C   s   | d dd | D S )z>Return a list of table and view names in the current database.zSHOW FULL TABLESc                 S   s*   g | ]}t |d  ddd|d qS )r   tv)z
BASE TABLEVIEW   )r   get.0rowr(   r(   r)   
<listcomp>H   s    z8DatabaseIntrospection.get_table_list.<locals>.<listcomp>executefetchall)r"   cursorr(   r(   r)   get_table_listE   s   
z$DatabaseIntrospection.get_table_listc                 C   s<  i }| j jr| j jjr|d|g dd | D }|d|g | }|r,|d nd}|d||g dd	 | D }|d
| j j|  dd }g }|j	D ]G}	||	d  }
|
tg |	dd ||
jpn|	d ||
jpw|	d ||
jp|	d |	d |
j|
j|
j|
j|	d |v R   qT|S )zj
        Return a description of the table with the DB-API cursor.description
        interface."
        av  
                SELECT c.constraint_name AS column_name
                FROM information_schema.check_constraints AS c
                WHERE
                    c.table_name = %s AND
                    LOWER(c.check_clause) =
                        'json_valid(`' + LOWER(c.constraint_name) + '`)' AND
                    c.constraint_schema = DATABASE()
                c                 S   s   h | ]}|d  qS r   r(   r/   r(   r(   r)   	<setcomp>e   s    z>DatabaseIntrospection.get_table_description.<locals>.<setcomp>z
            SELECT  table_collation
            FROM    information_schema.tables
            WHERE   table_schema = DATABASE()
            AND     table_name = %s
            r    aD  
            SELECT
                column_name, data_type, character_maximum_length,
                numeric_precision, numeric_scale, extra, column_default,
                CASE
                    WHEN collation_name = %s THEN NULL
                    ELSE collation_name
                END AS collation_name,
                CASE
                    WHEN column_type LIKE '%% unsigned' THEN 1
                    ELSE 0
                END AS is_unsigned
            FROM information_schema.columns
            WHERE table_name = %s AND table_schema = DATABASE()
            c                 S   s   i | ]	}|d  t | qS r8   )r   )r0   liner(   r(   r)   
<dictcomp>   s    z?DatabaseIntrospection.get_table_description.<locals>.<dictcomp>zSELECT * FROM %s LIMIT 1c                 S   s   | d urt | S | S N)int)ir(   r(   r)   to_int   s   z;DatabaseIntrospection.get_table_description.<locals>.to_intN            )
connectionmysql_is_mariadbfeaturescan_introspect_json_fieldr4   r5   fetchoneops
quote_namer$   appendr   max_lennum_prec	num_scalecolumn_default	collationr	   r
   )r"   r6   
table_namejson_constraintsr1   default_column_collation
field_infor@   fieldsr;   infor(   r(   r)   get_table_descriptionM   sh   		

	

z+DatabaseIntrospection.get_table_descriptionr(   c                 C   s2   |  ||D ]}d|jv r||jdg  S qg S )Nr   )tablecolumn)rX   r	   name)r"   r6   rR   table_fieldsrU   r(   r(   r)   get_sequences   s
   
z#DatabaseIntrospection.get_sequencesc                 C   s    | d|g dd | D S )z
        Return a dictionary of {field_name: (field_name_other_table, other_table)}
        representing all foreign keys in the given table.
        aM  
            SELECT column_name, referenced_column_name, referenced_table_name
            FROM information_schema.key_column_usage
            WHERE table_name = %s
                AND table_schema = DATABASE()
                AND referenced_table_name IS NOT NULL
                AND referenced_column_name IS NOT NULL
            c                 S   s   i | ]
\}}}|||fqS r(   r(   )r0   
field_nameother_fieldother_tabler(   r(   r)   r<      s    z7DatabaseIntrospection.get_relations.<locals>.<dictcomp>r3   )r"   r6   rR   r(   r(   r)   get_relations   s   z#DatabaseIntrospection.get_relationsc                 C   s,   | d|g | }|s| jjjS |d S )z
        Retrieve the storage engine for a given table. Return the default
        storage engine if the table doesn't exist.
        z
            SELECT engine
            FROM information_schema.tables
            WHERE
                table_name = %s AND
                table_schema = DATABASE()
            r   )r4   rI   rE   rG   _mysql_storage_engine)r"   r6   rR   resultr(   r(   r)   get_storage_engine   s   

z(DatabaseIntrospection.get_storage_enginec                 C   s~   t  }t|d }dd | D }|D ]'}|jtjjkr<| jj	|j
|j
kr<|j
dd |v r<||j
dd  q|S )Nr   c                 s   s    | ]}|j s|V  qd S r=   )is_whitespace)r0   tokenr(   r(   r)   	<genexpr>   s    zBDatabaseIntrospection._parse_constraint_columns.<locals>.<genexpr>r-   )r   sqlparseparseflattenttypetokensNamerE   rJ   rK   valueadd)r"   check_clausecolumnscheck_columns	statementrm   rf   r(   r(   r)   _parse_constraint_columns   s   z/DatabaseIntrospection._parse_constraint_columnsc                 C   s  i }d}| ||g | D ]5\}}}}}	||vr;t |	dk|	dv dd|r*||fndd||< | jjjr;g || d< || d | q| jjjrd	}
d
d | ||D }| jj	r^d}nd}| ||g | D ]$\}}| 
||}t||hkr|
d7 }
d|
 }|dddddd||< qk| d| jj|  dd | D D ]V\}}}}}}}||vrt d| ddd||< | jjjrg || d< d|| d< |dkrtjn| || d< || d | | jjjr|| d |dkrdnd q| D ]}t|d |d< q |S )zu
        Retrieve any constraints or keys (unique, pk, fk, check, index) across
        one or more columns.
        ai  
            SELECT kc.`constraint_name`, kc.`column_name`,
                kc.`referenced_table_name`, kc.`referenced_column_name`,
                c.`constraint_type`
            FROM
                information_schema.key_column_usage AS kc,
                information_schema.table_constraints AS c
            WHERE
                kc.table_schema = DATABASE() AND
                c.table_schema = kc.table_schema AND
                c.constraint_name = kc.constraint_name AND
                c.constraint_type != 'CHECK' AND
                kc.table_name = %s
            ORDER BY kc.`ordinal_position`
        PRIMARY KEY>   UNIQUErv   FN)rr   primary_keyuniqueindexcheckforeign_keyordersrr   r   c                 S   s   h | ]}|j qS r(   )r[   )r0   rW   r(   r(   r)   r9   	  s    z8DatabaseIntrospection.get_constraints.<locals>.<setcomp>a  
                    SELECT c.constraint_name, c.check_clause
                    FROM information_schema.check_constraints AS c
                    WHERE
                        c.constraint_schema = DATABASE() AND
                        c.table_name = %s
                a3  
                    SELECT cc.constraint_name, cc.check_clause
                    FROM
                        information_schema.check_constraints AS cc,
                        information_schema.table_constraints AS tc
                    WHERE
                        cc.constraint_schema = DATABASE() AND
                        tc.table_schema = cc.constraint_schema AND
                        cc.constraint_name = tc.constraint_name AND
                        tc.constraint_type = 'CHECK' AND
                        tc.table_name = %s
                r-   z__unnamed_constraint_%s__TzSHOW INDEX FROM %sc                 S   s"   g | ]}|d d |d f qS )NrD   
   r(   )r0   xr(   r(   r)   r2   8  s    z9DatabaseIntrospection.get_constraints.<locals>.<listcomp>)rr   rx   ry   r{   r|   rz   BTREEtypeDDESCASC)r4   r5   r   rE   rG   supports_index_column_orderingrp    can_introspect_check_constraintsrX   rF   ru   setrJ   rK   r   suffixlowerrL   valueslist)r"   r6   rR   constraints
name_query
constraintrZ   	ref_table
ref_columnkindunnamed_constraints_indexrr   
type_queryrq   constraint_columnsrY   
non_uniquerz   colseqordertype_r(   r(   r)   get_constraints   s~   



	



z%DatabaseIntrospection.get_constraints)r(   )#__name__
__module____qualname__r   BLOBCHARDECIMAL
NEWDECIMALDATEDATETIMEDOUBLEFLOATINT24JSONLONGLONGLONGSHORTSTRINGTIME	TIMESTAMPTINY	TINY_BLOBMEDIUM_BLOB	LONG_BLOB
VAR_STRINGdata_types_reverser!   r7   rX   r]   ra   rd   ru   r   __classcell__r(   r(   r&   r)   r      sb    	

Xr   )collectionsr   ri   MySQLdb.constantsr   %django.db.backends.base.introspectionr   r   BaseFieldInfor   django.db.modelsr   django.utils.datastructuresr   _fieldsr   r   r(   r(   r(   r)   <module>   s     
