U
    €Ha‰O  ã                   @   sŠ   d dl Z d dlmZ d dlZd dlmZmZmZ d dl	m
Z
 d dlmZ edejd ƒZedƒZd	d
„ ZG dd„ dƒZG dd„ deƒZdS )é    N)Ú
namedtuple)ÚBaseDatabaseIntrospectionÚ	FieldInfoÚ	TableInfo)ÚIndex)Ú_lazy_re_compiler   )ÚpkÚhas_json_constraintz&^\s*(?:var)?char\s*\(\s*(\d+)\s*\)\s*$c                 C   s   t  | ¡}|rt|d ƒS dS )z8 Extract the size number from a "varchar(11)" type name é   N)Úfield_size_reÚsearchÚint)ÚnameÚm© r   úL/tmp/pip-unpacked-wheel-3jxiddxt/django/db/backends/sqlite3/introspection.pyÚget_field_size   s    
r   c                   @   s@   e Zd Zdddddddddddd	d
dddddddœZdd„ ZdS )ÚFlexibleFieldLookupDictZBooleanFieldÚSmallIntegerFieldZPositiveSmallIntegerFieldÚIntegerFieldÚBigIntegerFieldZPositiveIntegerFieldZPositiveBigIntegerFieldZDecimalFieldZ
FloatFieldZ	TextFieldZ	CharFieldZBinaryFieldZ	DateFieldZDateTimeFieldZ	TimeField)ÚboolÚbooleanZsmallintzsmallint unsignedZsmallintegerr   ÚintegerZbigintzinteger unsignedzbigint unsignedÚdecimalÚrealÚtextÚcharZvarcharZblobÚdateÚdatetimeÚtimec                 C   s"   |  ¡  dd¡d  ¡ }| j| S )Nú(r
   r   )ÚlowerÚsplitÚstripÚbase_data_types_reverse)ÚselfÚkeyr   r   r   Ú__getitem__4   s    z#FlexibleFieldLookupDict.__getitem__N)Ú__name__Ú
__module__Ú__qualname__r%   r(   r   r   r   r   r      s*   ír   c                       s„   e Zd Zeƒ Z‡ fdd„Zdd„ Zdd„ Zddd	„Zd
d„ Z	dd„ Z
dd„ Zdd„ Zdd„ Zdd„ Zdd„ Zdd„ Zdd„ Z‡  ZS )ÚDatabaseIntrospectionc                    s.   t ƒ  ||¡}|jr |dkr dS |jr*dS |S )N>   r   r   r   Z	AutoFieldZ	JSONField)ÚsuperÚget_field_typer   r	   )r&   Ú	data_typeÚdescriptionZ
field_type©Ú	__class__r   r   r.   <   s    z$DatabaseIntrospection.get_field_typec                 C   s   |  d¡ dd„ | ¡ D ƒS )z>Return a list of table and view names in the current database.z–
            SELECT name, type FROM sqlite_master
            WHERE type in ('table', 'view') AND NOT name='sqlite_sequence'
            ORDER BY namec                 S   s"   g | ]}t |d  |d d  ƒ‘qS )r   r
   )r   )Ú.0Úrowr   r   r   Ú
<listcomp>N   s     z8DatabaseIntrospection.get_table_list.<locals>.<listcomp>)ÚexecuteÚfetchall)r&   Úcursorr   r   r   Úget_table_listF   s    
z$DatabaseIntrospection.get_table_listc                    sŒ   |  d| jj |¡ ¡ | ¡ }|  ||¡‰ tƒ ‰| jjjrx|D ]6}|d }d| }|  d||g¡ 	¡ }|r@ˆ 
|¡ q@‡ ‡fdd„|D ƒS )zi
        Return a description of the table with the DB-API cursor.description
        interface.
        zPRAGMA table_info(%s)r
   z%%json_valid("%s")%%zæ
                    SELECT sql
                    FROM sqlite_master
                    WHERE
                        type = 'table' AND
                        name = %s AND
                        sql LIKE %s
                c                    sH   g | ]@\}}}}}}t ||d t|ƒd d | |ˆ  |¡|dk|ˆkƒ‘qS )Nr
   )r   r   Úget)r3   Zcidr   r/   ZnotnullÚdefaultr   ©Ú
collationsZjson_columnsr   r   r5   g   s   ü         þz?DatabaseIntrospection.get_table_description.<locals>.<listcomp>)r6   Ú
connectionÚopsÚ
quote_namer7   Ú_get_column_collationsÚsetÚfeaturesZcan_introspect_json_fieldÚfetchoneÚadd)r&   r8   Ú
table_nameZ
table_infoÚlineÚcolumnZjson_constraint_sqlr	   r   r<   r   Úget_table_descriptionP   s     
ùûz+DatabaseIntrospection.get_table_descriptionr   c                 C   s   |   ||¡}||dœgS )N)ÚtablerH   )Úget_primary_key_column)r&   r8   rF   Ztable_fieldsZpk_colr   r   r   Úget_sequenceso   s    z#DatabaseIntrospection.get_sequencesc                 C   s~  i }|  d|g¡ | ¡ \}}|dkr*|S || d¡d | d¡… }| d¡D ]&}| ¡ }| d¡rjqPt d|tj	¡}|s€qPd	d
„ | 
¡ D ƒ\}	}
| d¡rÀt d|tj	¡}|d  d¡}n| ¡ d  d¡}|  d|	g¡ | ¡ d }|d  ¡ }| d¡| d¡ }}||d |… }| d¡D ]N}| ¡ }| d¡rDq(| dd¡d  d¡}||
kr(||	f||<  qPq(qP|S )z—
        Return a dictionary of {field_name: (field_name_other_table, other_table)}
        representing all relationships to the given table.
        úUSELECT sql, type FROM sqlite_master WHERE tbl_name = %s AND type IN ('table', 'view')Úviewr!   r
   ú)ú,ÚUNIQUEz$references (\S*) ?\(["|]?(.*)["|]?\)c                 S   s   g | ]}|  d ¡‘qS )ú"©r$   ©r3   Úsr   r   r   r5   ’   s     z7DatabaseIntrospection.get_relations.<locals>.<listcomp>zFOREIGN KEYzFOREIGN KEY\s*\(([^\)]*)\).*rR   r   z1SELECT sql FROM sqlite_master WHERE tbl_name = %sú )r6   rD   ÚindexÚrindexr#   r$   Ú
startswithÚrer   ÚIÚgroupsÚmatchr7   )r&   r8   rF   Z	relationsÚ
create_sqlÚ
table_typeÚresultsÚ
field_descr   rJ   rH   Ú
field_nameÚresultZother_table_resultsÚliÚriZ
other_descZ
other_namer   r   r   Úget_relationss   sF    ý



z#DatabaseIntrospection.get_relationsc                 C   s¢   g }|  d|dg¡ | ¡ d  ¡ }|| d¡d | d¡… }t| d¡ƒD ]N\}}| ¡ }| d¡rjqNt 	d	|tj
¡}|s€qN| td
d„ | ¡ D ƒƒ¡ qN|S )z‹
        Return a list of (column_name, referenced_table_name, referenced_column_name)
        for all key columns in given table.
        z?SELECT sql FROM sqlite_master WHERE tbl_name = %s AND type = %srJ   r   r!   r
   rO   rP   rQ   z("(.*)".*references (.*) \(["|](.*)["|]\)c                 s   s   | ]}|  d ¡V  qdS )rR   NrS   rT   r   r   r   Ú	<genexpr>Æ   s     z8DatabaseIntrospection.get_key_columns.<locals>.<genexpr>)r6   rD   r$   rW   rX   Ú	enumerater#   rY   rZ   r   r[   ÚappendÚtupler\   )r&   r8   rF   Zkey_columnsr`   Zfield_indexra   r   r   r   r   Úget_key_columns­   s    
z%DatabaseIntrospection.get_key_columnsc           	      C   s¢   |  d|g¡ | ¡ }|dkr*td| ƒ‚|\}}|dkr>dS || d¡d | d¡… }| d¡D ]8}| ¡ }t d	|¡}|rd|d r|d n|d
   S qddS )z>Return the column name of the primary key for the given table.rM   NzTable %s does not existrN   r!   r
   rO   rP   z1(?:(?:["`\[])(.*)(?:["`\]])|(\w+)).*PRIMARY KEY.*é   )	r6   rD   Ú
ValueErrorrW   rX   r#   r$   rZ   r]   )	r&   r8   rF   r4   r^   r_   Z
fields_sqlra   r   r   r   r   rK   Ê   s"    ýz,DatabaseIntrospection.get_primary_key_columnc           
      C   sd   i }|  d| jj |¡ ¡ | ¡ D ]:}|d d… \}}}}}	|gdd||	fdddœ|d| < q$|S )NzPRAGMA foreign_key_list(%s)é   F©ÚcolumnsÚprimary_keyÚuniqueÚforeign_keyÚcheckrW   zfk_%d)r6   r>   r?   r@   r7   )
r&   r8   rF   Úconstraintsr4   Zid_Ú_rJ   Úfrom_Útor   r   r   Ú_get_foreign_key_constraintsá   s    úz2DatabaseIntrospection._get_foreign_key_constraintsc                 C   sÆ  d }d }d }d }d}g }d}	g }
d}|D ]V}|  tjjd¡rH|d7 }nF|  tjjd¡rp|d8 }|dk rŽ q‚n|dkrŽ|  tjjd¡rŽ q‚|d kr¬|  tjjd¡}|r¬q(|r~|d krø|jtjjtjjfkrØ|j}n |jtjjj	j
krø|jdd… }|  tjjd	¡rd
}|}nh|râ||kr.|r(d}q(|jtjjtjjfkrT| |j¡ n(|jtjjj	j
krâ| |jdd… ¡ nd|d krÊ|jtjjtjjfkr¨|j}n"|jtjjj	j
krÊ|jdd… }|  tjjd	¡râ|g}|  tjjd¡rþd
}	|}q(|	r(||kr|
r(d}	q(|jtjjtjjfkrH|j|kr€|
 |j¡ q(|jtjjj	j
kr(|jdd… |kr(|
 |jdd… ¡ q(|ršd
|dd dddœnd }|
r¶d
|
ddd ddœnd }||||fS )NFr   r!   r
   rO   rP   Z
CONSTRAINTéÿÿÿÿrQ   TZCHECK)rr   rp   rq   rs   rt   rW   )rt   rp   rq   rr   rs   rW   )r]   ÚsqlparseÚtokensÚPunctuationÚKeywordÚttypeÚNameÚvalueÚLiteralÚStringZSymbolri   )r&   r|   rp   ÚtokenZis_constraint_definitionrb   Úconstraint_namerr   Zunique_columnsrt   Zcheck_columnsZbraces_deepZunique_braces_deepZcheck_braces_deepZunique_constraintZcheck_constraintr   r   r   Ú&_parse_column_or_constraint_definitionñ   s¨    




ùúùùúùz<DatabaseIntrospection._parse_column_or_constraint_definitionc                 C   s¾   t  |¡d }i }d}dd„ | ¡ D ƒ}|D ]}| t jjd¡r, qFq,|  ||¡\}}	}
}|	r€|rl|	||< n|d7 }|	|d| < |
r¦|r’|
||< n|d7 }|
|d| < | t jjd¡rFqºqF|S )Nr   c                 s   s   | ]}|j s|V  qd S ©N)Zis_whitespace)r3   r„   r   r   r   rg   Q  s      zADatabaseIntrospection._parse_table_constraints.<locals>.<genexpr>r!   r
   z__unnamed_constraint_%s__rO   )r{   ÚparseÚflattenr]   r|   r}   r†   )r&   Úsqlrp   Z	statementru   Zunnamed_constrains_indexr|   r„   r…   rr   rt   Z	end_tokenr   r   r   Ú_parse_table_constraintsK  s*    

z.DatabaseIntrospection._parse_table_constraintsc              	   C   s¦  i }z&|  d| jj |¡f ¡ ¡ d }W n tk
r>   Y n*X dd„ |  ||¡D ƒ}| |  ||¡¡ |  d| jj |¡ ¡ | 	¡ D ]Ü}|dd… \}}}	|  d| jj |¡ ¡ | ¡ pÀd	\}
|
sÊqˆ|  d
| jj |¡ ¡ | 	¡ D ]@\}}}||krg dt
|	ƒddddœ||< || d  |¡ qê|| d rˆtj|| d< |  |
¡}|dk	rˆ||| d< qˆ|  ||¡}|r|gddddddœ|d< | |  ||¡¡ |S )zu
        Retrieve any constraints or keys (unique, pk, fk, check, index) across
        one or more columns.
        z<SELECT sql FROM sqlite_master WHERE type='table' and name=%sr   c                 S   s   h | ]
}|j ’qS r   )r   ©r3   Úinfor   r   r   Ú	<setcomp>z  s     z8DatabaseIntrospection.get_constraints.<locals>.<setcomp>zPRAGMA index_list(%s)Né   z<SELECT sql FROM sqlite_master WHERE type='index' AND name=%sr‡   zPRAGMA index_info(%s)FTro   rp   rW   ÚtypeÚordersZ__primary__)r6   r>   r?   r@   rD   Ú	TypeErrorrI   Úupdater‹   r7   r   ri   r   ÚsuffixÚ_get_index_columns_ordersrK   ry   )r&   r8   rF   ru   Ztable_schemarp   r4   ÚnumberrW   rr   rŠ   Z
index_rankZcolumn_rankrH   r‘   Z	pk_columnr   r   r   Úget_constraintsi  sf    ÿÿüÿÿ
ú

ú
z%DatabaseIntrospection.get_constraintsc                 C   sP   t  |¡d }|D ]8}t|t jjƒrt|ƒ d¡ d¡}dd„ |D ƒ  S qd S )Nr   ú()ú, c                 S   s   g | ]}|  d ¡rd nd‘qS )ZDESCÚASC)ÚendswithrŒ   r   r   r   r5   ½  s     zCDatabaseIntrospection._get_index_columns_orders.<locals>.<listcomp>)r{   rˆ   Ú
isinstancerŠ   ZParenthesisÚstrr$   r#   )r&   rŠ   r|   r„   rp   r   r   r   r•   ¸  s    z/DatabaseIntrospection._get_index_columns_ordersc                 C   sª   |  d|g¡ ¡ }|si S |d }tt |¡d d ƒ d¡ d¡}i }|D ]X}|dd …  ¡ }|d  d¡}	t|ƒD ] \}
}|dkrv||
d  } qœqvd }|||	< qL|S )	Nzn
            SELECT sql
            FROM sqlite_master
            WHERE type = 'table' AND name = %s
        r   rz   r˜   r™   r
   rR   ZCOLLATE)r6   rD   r   r{   rˆ   r$   r#   rh   )r&   r8   rF   r4   rŠ   rp   r=   rH   r|   Zcolumn_namerW   r„   Z	collationr   r   r   rA   À  s$    ü"
z,DatabaseIntrospection._get_column_collations)r   )r)   r*   r+   r   Zdata_types_reverser.   r9   rI   rL   rf   rk   rK   ry   r†   r‹   r—   r•   rA   Ú__classcell__r   r   r1   r   r,   9   s   


:ZOr,   )rZ   Úcollectionsr   r{   Z%django.db.backends.base.introspectionr   r   ZBaseFieldInfor   Zdjango.db.modelsr   Zdjango.utils.regex_helperr   Ú_fieldsr   r   r   r,   r   r   r   r   Ú<module>   s   	