B
    ²ô`K  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*$c             C   s   t  | ¡}|rt|d ƒS dS )z8 Extract the size number from a "varchar(11)" type name é   N)Úfield_size_reÚsearchÚint)ÚnameÚm© r   úW/home/dcms/DCMS/lib/python3.7/site-packages/django/db/backends/sqlite3/introspection.pyÚget_field_size   s    
r   c               @   s@   e Zd Zdddddddddddd	d
dddddddœZdd„ ZdS )ÚFlexibleFieldLookupDictZBooleanFieldÚSmallIntegerFieldZPositiveSmallIntegerFieldÚIntegerFieldÚBigIntegerFieldZPositiveIntegerFieldZPositiveBigIntegerFieldZDecimalFieldZ
FloatFieldZ	TextFieldZ	CharFieldZBinaryFieldZ	DateFieldZDateTimeFieldZ	TimeField)ÚboolÚbooleanZsmallintzsmallint unsignedZsmallintegerr   ÚintegerZbigintzinteger unsignedzbigint unsignedÚdecimalÚrealÚtextÚcharZvarcharZblobÚdateÚdatetimeÚtimec             C   s"   |  ¡  dd¡d  ¡ }| j| S )Nú(r
   r   )ÚlowerÚsplitÚstripÚbase_data_types_reverse)ÚselfÚkeyr   r   r   Ú__getitem__4   s    z#FlexibleFieldLookupDict.__getitem__N)Ú__name__Ú
__module__Ú__qualname__r%   r(   r   r   r   r   r      s(   r   c                   st   e Zd Zeƒ Z‡ fdd„Zdd„ Zdd„ Zddd	„Zd
d„ Z	dd„ Z
dd„ Zdd„ Zdd„ Zdd„ Zdd„ Z‡  ZS )ÚDatabaseIntrospectionc                s.   t ƒ  ||¡}|jr |dkr dS |jr*dS |S )N>   r   r   r   Z	AutoFieldZ	JSONField)ÚsuperÚget_field_typer   r	   )r&   Ú	data_typeÚdescriptionZ
field_type)Ú	__class__r   r   r.   <   s    z$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                s‚   |  d| jj |¡ ¡ | ¡ }tƒ ‰ | jjjrpx>|D ]6}|d }d| }|  d||g¡ ¡ }|r6ˆ  	|¡ q6W ‡ 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                s@   g | ]8\}}}}}}t ||d t|ƒd d | ||dk|ˆ kƒ
‘qS )Nr
   )r   r   )r2   Zcidr   r/   ZnotnullÚdefaultr   )Újson_columnsr   r   r4   g   s   z?DatabaseIntrospection.get_table_description.<locals>.<listcomp>)
r5   Ú
connectionÚopsÚ
quote_namer6   ÚsetÚfeaturesZcan_introspect_json_fieldÚfetchoneÚadd)r&   r7   Ú
table_nameZ
table_infoÚlineÚcolumnZjson_constraint_sqlr	   r   )r:   r   Úget_table_descriptionP   s    


z+DatabaseIntrospection.get_table_descriptionr   c             C   s   |   ||¡}||dœgS )N)ÚtablerD   )Úget_primary_key_column)r&   r7   rB   Ztable_fieldsZpk_colr   r   r   Úget_sequencesn   s    z#DatabaseIntrospection.get_sequencesc             C   s†  i }|  d|g¡ | ¡ \}}|dkr*|S || d¡d | d¡… }x8| d¡D ](}| ¡ }| d¡rnqTt d|tj	¡}|s„qTd	d
„ | 
¡ D ƒ\}	}
| d¡rÄt d|tj	¡}|d  d¡}n| ¡ d  d¡}|  d|	g¡ | ¡ d }|d  ¡ }| d¡| d¡ }}||d |… }xZ| d¡D ]L}| ¡ }| d¡rJq.| dd¡d  d¡}||
kr.||	f||< P q.W qTW |S )z—
        Return a dictionary of {field_name: (field_name_other_table, other_table)}
        representing all relationships to the given table.
        zUSELECT 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$   )r2   Úsr   r   r   r4   ‘   s    z7DatabaseIntrospection.get_relations.<locals>.<listcomp>zFOREIGN KEYzFOREIGN KEY\s*\(([^\)]*)\).*rM   r   z1SELECT sql FROM sqlite_master WHERE tbl_name = %sú )r5   r@   ÚindexÚrindexr#   r$   Ú
startswithÚrer   ÚIÚgroupsÚmatchr6   )r&   r7   rB   Z	relationsÚ
create_sqlÚ
table_typeÚresultsÚ
field_descr   rF   rD   Ú
field_nameÚresultZother_table_resultsÚliÚriZ
other_descZ
other_namer   r   r   Úget_relationsr   sD    


z#DatabaseIntrospection.get_relationsc             C   s¦   g }|  d|dg¡ | ¡ d  ¡ }|| d¡d | d¡… }x`t| d¡ƒD ]N\}}| ¡ }| d¡rlqPt 	d	|tj
¡}|s‚qP| td
d„ | ¡ D ƒƒ¡ qPW |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 = %srF   r   r!   r
   rJ   rK   rL   z("(.*)".*references (.*) \(["|](.*)["|]\)c             s   s   | ]}|  d ¡V  qdS )rM   N)r$   )r2   rN   r   r   r   ú	<genexpr>Å   s    z8DatabaseIntrospection.get_key_columns.<locals>.<genexpr>)r5   r@   r$   rP   rQ   Ú	enumerater#   rR   rS   r   rT   ÚappendÚtuplerU   )r&   r7   rB   Zkey_columnsrY   Zfield_indexrZ   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¡… }xB| d¡D ]4}| ¡ }t d	|¡}|rf|d r’|d S |d
 S qfW dS )z>Return the column name of the primary key for the given table.zUSELECT sql, type FROM sqlite_master WHERE tbl_name = %s AND type IN ('table', 'view')NzTable %s does not existrI   r!   r
   rJ   rK   z1(?:(?:["`\[])(.*)(?:["`\]])|(\w+)).*PRIMARY KEY.*é   )	r5   r@   Ú
ValueErrorrP   rQ   r#   r$   rS   rV   )	r&   r7   rB   r3   rW   rX   Z
fields_sqlrZ   r   r   r   r   rG   É   s     z,DatabaseIntrospection.get_primary_key_columnc       
      C   sh   i }|  d| jj |¡ ¡ xF| ¡ D ]:}|d d… \}}}}}	|gdd||	fdddœ|d| < q&W |S )NzPRAGMA foreign_key_list(%s)é   F)ÚcolumnsÚprimary_keyÚuniqueÚforeign_keyÚcheckrP   zfk_%d)r5   r;   r<   r=   r6   )
r&   r7   rB   Úconstraintsr3   Zid_Ú_rF   Úfrom_Útor   r   r   Ú_get_foreign_key_constraintsà   s    z2DatabaseIntrospection._get_foreign_key_constraintsc             C   sÄ  d }d }d }d }d}g }d}	g }
d}xX|D ]N}|  tjjd¡rL|d7 }n>|  tjjd¡rp|d8 }|dk rŠP n|dkrŠ|  tjjd¡rŠP |d kr¨|  tjjd¡}|r¨q,|rz|d krô|jtjjtjjfkrÔ|j}n |jtjjj	j
krô|jdd… }|  tjjd	¡rd
}|}nh|rÞ||kr*|r,d}q,|jtjjtjjfkrP| |j¡ n(|jtjjj	j
krÞ| |jdd… ¡ nd|d krÆ|jtjjtjjfkr¤|j}n"|jtjjj	j
krÆ|jdd… }|  tjjd	¡rÞ|g}|  tjjd¡rúd
}	|}q,|	r,||kr|
r,d}	q,|jtjjtjjfkrD|j|kr||
 |j¡ q,|jtjjj	j
kr,|jdd… |kr,|
 |jdd… ¡ q,W |r˜d
|dd dddœnd }|
r´d
|
ddd ddœnd }||||fS )NFr   r!   r
   rJ   rK   Z
CONSTRAINTéÿÿÿÿrL   TZCHECK)rj   rh   ri   rk   rl   rP   )rl   rh   ri   rj   rk   rP   )rV   ÚsqlparseÚtokensÚPunctuationÚKeywordZttypeÚNameÚvalueÚLiteralÚStringZSymbolrb   )r&   rt   rh   ÚtokenZis_constraint_definitionr[   Úconstraint_namerj   Zunique_columnsrl   Zcheck_columnsZbraces_deepZunique_braces_deepZcheck_braces_deepZunique_constraintZcheck_constraintr   r   r   Ú&_parse_column_or_constraint_definitionð   s€    



z<DatabaseIntrospection._parse_column_or_constraint_definitionc             C   sÄ   t  |¡d }i }d}dd„ | ¡ D ƒ}x|D ]}| t jjd¡r.P q.W xv|  ||¡\}}	}
}|	r„|rp|	||< n|d7 }|	|d| < |
rª|r–|
||< n|d7 }|
|d| < | t jjd¡rJP qJW |S )Nr   c             s   s   | ]}|j s|V  qd S )N)Zis_whitespace)r2   r{   r   r   r   r`   P  s    zADatabaseIntrospection._parse_table_constraints.<locals>.<genexpr>r!   r
   z__unnamed_constraint_%s__rJ   )rs   ÚparseÚflattenrV   rt   ru   r}   )r&   Úsqlrh   Z	statementrm   Zunnamed_constrains_indexrt   r{   r|   rj   rl   Z	end_tokenr   r   r   Ú_parse_table_constraintsJ  s,    


z.DatabaseIntrospection._parse_table_constraintsc          	   C   sØ  i }y&|  d| jj |¡f ¡ ¡ d }W n tk
r>   Y n*X dd„ |  ||¡D ƒ}| |  ||¡¡ |  d| jj |¡ ¡ x| 	¡ D ]}|dd… \}}}	|  d| jj |¡ ¡ | ¡ pÆd	\}
|
sÐqŒ|  d
| jj |¡ ¡ xL| 	¡ D ]@\}}}||kr g dt
|	ƒddddœ||< || d  |¡ qòW || d rŒ|| d sŒtj|| d< |
 d¡d  d¡d  d¡}dd„ |D ƒ}||| d< qŒW |  ||¡}|rÂ|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   )r2   Úinfor   r   r   ú	<setcomp>y  s    z8DatabaseIntrospection.get_constraints.<locals>.<setcomp>zPRAGMA index_list(%s)Né   z<SELECT sql FROM sqlite_master WHERE type='index' AND name=%s)NzPRAGMA index_info(%s)FT)rh   ri   rj   rk   rl   rP   rh   rP   rj   Útyper!   rr   rJ   rK   c             S   s   g | ]}|  d ¡rd nd‘qS )ZDESCÚASC)Úendswith)r2   r‚   r   r   r   r4   £  s    z9DatabaseIntrospection.get_constraints.<locals>.<listcomp>ÚordersZ__primary__)r5   r;   r<   r=   r@   Ú	TypeErrorrE   Úupdater   r6   r   rb   r   Úsuffixr#   rG   rq   )r&   r7   rB   rm   Ztable_schemarh   r3   ÚnumberrP   rj   r€   Z
index_rankZcolumn_rankrD   Z
order_inforˆ   Z	pk_columnr   r   r   Úget_constraintsh  sX    

z%DatabaseIntrospection.get_constraints)r   )r)   r*   r+   r   Zdata_types_reverser.   r8   rE   rH   r_   rd   rG   rq   r}   r   r   Ú__classcell__r   r   )r1   r   r,   9   s   


:Zr,   )rS   Úcollectionsr   rs   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   	