U
    dGD                     @   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Zdd ZG dd dZG dd deZdS )    )
namedtupleN)DatabaseError)BaseDatabaseIntrospection)	FieldInfo	TableInfo)Index)_lazy_re_compiler   )pkhas_json_constraintz&^\s*(?:var)?char\s*\(\s*(\d+)\s*\)\s*$c                 C   s   t | }|rt|d S dS )z6Extract the size number from a "varchar(11)" type name   N)field_size_researchint)namem r   L/tmp/pip-unpacked-wheel-7vj2equ7/django/db/backends/sqlite3/introspection.pyget_field_size   s    
r   c                   @   s@   e Zd Zdddddddddddd	d
dddddddZdd ZdS )FlexibleFieldLookupDictZBooleanFieldSmallIntegerFieldZPositiveSmallIntegerFieldIntegerFieldBigIntegerFieldZPositiveIntegerFieldZPositiveBigIntegerFieldZDecimalFieldZ
FloatFieldZ	TextFieldZ	CharFieldZBinaryFieldZ	DateFieldZDateTimeFieldZ	TimeField)boolbooleanZsmallintzsmallint unsignedZsmallintegerr   integerZbigintzinteger unsignedzbigint unsigneddecimalrealtextcharZvarcharZblobdatedatetimetimec                 C   s"   |  ddd  }| j| S )N(r   r   )lowersplitstripbase_data_types_reverse)selfkeyr   r   r   __getitem__6   s    z#FlexibleFieldLookupDict.__getitem__N)__name__
__module____qualname__r'   r*   r   r   r   r   r      s*   r   c                       st   e Zd Ze Z fddZdd Zdd Zddd	Zd
d Z	dd Z
dd Zdd Zdd Zdd Zdd Z  ZS )DatabaseIntrospectionc                    s.   t  ||}|jr |dkr dS |jr*dS |S )N>   r   r   r   Z	AutoFieldZ	JSONField)superget_field_typer
   r   )r(   	data_typedescriptionZ
field_type	__class__r   r   r0   >   s    z$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
            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  qS )r   r   r   ).0rowr   r   r   
<listcomp>V   s     z8DatabaseIntrospection.get_table_list.<locals>.<listcomp>)executefetchall)r(   cursorr   r   r   get_table_listL   s    z$DatabaseIntrospection.get_table_listc                    s   | d| jj|  | }|s4td| d| || t | jjj	r|D ]6}|d }d| }| d||g
 }|rT| qT fdd|D S )	zi
        Return a description of the table with the DB-API cursor.description
        interface.
        PRAGMA table_info(%s)zTable z does not exist (empty pragma).r   z%%json_valid("%s")%%z
                    SELECT sql
                    FROM sqlite_master
                    WHERE
                        type = 'table' AND
                        name = %s AND
                        sql LIKE %s
                c                    sH   g | ]@\}}}}}}t ||d t|d d | | ||dk|kqS )Nr   )r   r   get)r5   Zcidr   r1   Znotnulldefaultr
   
collationsZjson_columnsr   r   r7   v   s   z?DatabaseIntrospection.get_table_description.<locals>.<listcomp>)r8   
connectionops
quote_namer9   r   _get_column_collationssetfeaturesZcan_introspect_json_fieldfetchoneadd)r(   r:   
table_nameZ
table_infolinecolumnZjson_constraint_sqlr   r   r?   r   get_table_descriptionX   s*    
z+DatabaseIntrospection.get_table_descriptionr   c                 C   s   |  ||}||dgS )N)tablerK   )get_primary_key_column)r(   r:   rI   Ztable_fieldsZpk_colr   r   r   get_sequences   s    z#DatabaseIntrospection.get_sequencesc                 C   s*   | d| jj|  dd | D S )z
        Return a dictionary of {column_name: (ref_column_name, ref_table_name)}
        representing all foreign keys in the given table.
        zPRAGMA foreign_key_list(%s)c                 S   s"   i | ]^}}}}}}|||fqS r   r   )r5   _ref_table_namecolumn_nameref_column_namer   r   r   
<dictcomp>   s    z7DatabaseIntrospection.get_relations.<locals>.<dictcomp>r8   rA   rB   rC   r9   )r(   r:   rI   r   r   r   get_relations   s    	z#DatabaseIntrospection.get_relationsc                 C   s@   | d| jj|  | D ]^}}}}|r |  S q dS )z>Return the column name of the primary key for the given table.r<   NrU   )r(   r:   rI   rP   r   r
   r   r   r   rN      s    
z,DatabaseIntrospection.get_primary_key_columnc                 C   s  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 r qn|dkr| tjjdr q|d kr| tjjd}|rq(|r~|d kr|jtjjtjjfkr|j}n |jtjjj	j
kr|jdd }| tjjd	rd
}|}nh|r||kr.|r(d}q(|jtjjtjjfkrT||j n(|jtjjj	j
kr||jdd  nd|d kr|jtjjtjjfkr|j}n"|jtjjj	j
kr|jdd }| tjjd	r|g}| tjjdrd
}	|}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(|rd
|dd dddnd }|
rd
|
ddd ddnd }||||fS )NFr   r#   r   ),Z
CONSTRAINTZUNIQUETZCHECK)uniquecolumnsprimary_keyforeign_keycheckindex)r^   r[   r\   rZ   r]   r_   )matchsqlparsetokensPunctuationKeywordttypeNamevalueLiteralStringZSymbolappend)r(   rb   r[   tokenZis_constraint_definition
field_nameconstraint_namerZ   Zunique_columnsr^   Zcheck_columnsZbraces_deepZunique_braces_deepZcheck_braces_deepZunique_constraintZcheck_constraintr   r   r   &_parse_column_or_constraint_definition   s    

 



		z<DatabaseIntrospection._parse_column_or_constraint_definitionc                 C   s   t |d }i }d}dd | D }|D ]}|t jjdr, qFq,| ||\}}	}
}|	r|rl|	||< n|d7 }|	|d| < |
r|r|
||< n|d7 }|
|d| < |t jjdrFqqF|S )Nr   c                 s   s   | ]}|j s|V  qd S N)Zis_whitespace)r5   rk   r   r   r   	<genexpr>  s      zADatabaseIntrospection._parse_table_constraints.<locals>.<genexpr>r#   r   z__unnamed_constraint_%s__rW   )ra   parseflattenr`   rb   rc   rn   )r(   sqlr[   Z	statementconstraintsZunnamed_constrains_indexrb   rk   rm   rZ   r^   Z	end_tokenr   r   r   _parse_table_constraints  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 }|| || | d| jj|  |	 D ]}|dd \}}}	| d| jj|  | pd	\}
|
sq| d
| jj|  |	 D ]@\}}}||krg dt
|	dddd||< || d | q|| d rtj|| d< | |
}|dk	r||| d< q| ||}|r|gdddddd|d< t| || }|dd |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   r5   infor   r   r   	<setcomp>D  s    z8DatabaseIntrospection.get_constraints.<locals>.<setcomp>zPRAGMA index_list(%s)N   z<SELECT sql FROM sqlite_master WHERE type='index' AND name=%sro   zPRAGMA index_info(%s)FTr[   r\   rZ   r]   r^   r_   r[   r_   typeordersZ__primary__c              
   S   s8   i | ]0\}\}\}}d | |gdd||fdddqS )Zfk_Frz   r   )r5   r_   rR   rS   rQ   r   r   r   rT     s   	z9DatabaseIntrospection.get_constraints.<locals>.<dictcomp>)r8   rA   rB   rC   rG   	TypeErrorrL   updateru   r9   r   rj   r   suffix_get_index_columns_ordersrN   	enumeraterV   items)r(   r:   rI   rt   Ztable_schemar[   r6   numberr_   rZ   rs   Z
index_rankZcolumn_rankrK   r|   Z	pk_columnZ	relationsr   r   r   get_constraints4  s|    




	z%DatabaseIntrospection.get_constraintsc                 C   sP   t |d }|D ]8}t|t jjrt|dd}dd |D   S qd S )Nr   (), c                 S   s   g | ]}| d rd ndqS )ZDESCASC)endswithrv   r   r   r   r7     s     zCDatabaseIntrospection._get_index_columns_orders.<locals>.<listcomp>)ra   rq   
isinstancers   ZParenthesisstrr&   r%   )r(   rs   rb   rk   r[   r   r   r   r     s    z/DatabaseIntrospection._get_index_columns_ordersc                 C   s   | d|g }|si S |d }tt|d d dd}i }|D ]X}|dd   }|d d}	t|D ] \}
}|dkrv||
d  } qqvd }|||	< qL|S )	Nzn
            SELECT sql
            FROM sqlite_master
            WHERE type = 'table' AND name = %s
        r   rY   r   r   r   "ZCOLLATE)r8   rG   r   ra   rq   r&   r%   r   )r(   r:   rI   r6   rs   r[   r@   rK   rb   rR   r_   rk   Z	collationr   r   r   rD     s&    "
z,DatabaseIntrospection._get_column_collations)r   )r+   r,   r-   r   Zdata_types_reverser0   r;   rL   rO   rV   rN   rn   ru   r   r   rD   __classcell__r   r   r3   r   r.   ;   s   /

d'ar.   )collectionsr   ra   Z	django.dbr   Z%django.db.backends.base.introspectionr   r   ZBaseFieldInfor   Zdjango.db.modelsr   Zdjango.utils.regex_helperr	   _fieldsr   r   r   r.   r   r   r   r   <module>   s    	