o
    ãRcT  ã                
   @   s  d 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
 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 ddlmZ G dd„ deƒZededededediZdd„ Zdd„ Ze ed¡dd„ ƒZe e
d ¡e ed ¡d!d"„ ƒƒZdS )#z5Establish constraint and index naming conventions.


é    Né   )Úevents)Ú
_NONE_NAME)Úconv)ÚCheckConstraint)ÚColumn)Ú
Constraint)ÚForeignKeyConstraint)ÚIndex)ÚPrimaryKeyConstraint)ÚTable)ÚUniqueConstrainté   )Úevent)Úexcc                   @   s\   e Z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dd„ ZdS )ÚConventionDictc                 C   s*   || _ t|tƒ| _|| _|| _|j| _d S ©N)ÚconstÚ
isinstancer	   Ú_is_fkÚtableÚ
conventionÚnameÚ_const_name)Úselfr   r   r   © r   ú7D:\Flask\env\Lib\site-packages\sqlalchemy/sql/naming.pyÚ__init__   s
   zConventionDict.__init__c                 C   s   | j jS r   )r   r   ©r   r   r   r   Ú_key_table_name&   s   zConventionDict._key_table_namec                 C   sp   | j rz| jj| }W n
 ty   Y dS w t|j|ƒS t| jjƒ}z|| }W n
 ty2   Y dS w t||ƒS )NÚ )r   r   ÚelementsÚ
IndexErrorÚgetattrÚparentÚlistÚcolumns)r   ÚidxÚattrnameÚfkÚcolsÚcolr   r   r   Ú	_column_X)   s   ÿÿ
zConventionDict._column_Xc                 C   s2   | j d tfv rt d¡‚t| j tƒsd | j_| j S )NzcNaming convention including %(constraint_name)s token requires that constraint is explicitly named.)r   r   r   ZInvalidRequestErrorr   r   r   r   r   r   r   r   Ú_key_constraint_name:   s   ÿz#ConventionDict._key_constraint_namec                 C   ó   |   |d¡S )NÚkey©r,   ©r   r'   r   r   r   Ú_key_column_X_keyE   s   z ConventionDict._key_column_X_keyc                 C   r.   )Nr   r0   r1   r   r   r   Ú_key_column_X_nameK   ó   z!ConventionDict._key_column_X_namec                 C   r.   )NZ
_ddl_labelr0   r1   r   r   r   Ú_key_column_X_labelN   r4   z"ConventionDict._key_column_X_labelc                 C   s>   | j jd }|j d¡}t|ƒdkr|\}}}|S |\}}|S )Nr   Ú.é   )r   r!   Ztarget_fullnameÚsplitÚlen)r   r)   ÚrefsZ	refschemaZreftableZrefcolr   r   r   Ú_key_referred_table_nameQ   s   
ÿz'ConventionDict._key_referred_table_namec                 C   s   | j j| }|jjS r   )r   r!   Úcolumnr   )r   r'   r)   r   r   r   Ú_key_referred_column_X_nameZ   s   z*ConventionDict._key_referred_column_X_namec           
   	   C   s,  || j v r| j | | j| jƒS t| d| ƒrt| d| ƒƒ S t d|¡}|r’| d¡}| d¡}|rz| jr:| jj	}nt
| jjƒ}g }t|ƒD ]%\}}d| d| d¡ }z| t| |ƒ|ƒ¡ W qF tyk   t|ƒ‚w | d¡rsdnd	}	|	 |¡S d| |d¡ }t|ƒ}t| |ƒr’t| |ƒ|ƒS t|ƒ‚)
Nz_key_%sz.*_?column_(\d+)(_?N)?_.+r   r   Z_key_Ú0ÚXÚ_r    )r   r   r   Úhasattrr#   ÚreÚmatchÚgroupr   r!   r%   r&   Ú	enumerateÚreplaceÚappendÚAttributeErrorÚKeyErrorÚ
startswithÚjoinÚint)
r   r/   Zcol_templater'   Z	multiplesÚelemsÚtokensÚelemÚattrÚsepr   r   r   Ú__getitem__a   s6   



ÿ

zConventionDict.__getitem__N)Ú__name__Ú
__module__Ú__qualname__r   r   r,   r-   r2   r3   r5   r;   r=   rR   r   r   r   r   r      s    	r   ZixÚpkZckZuqr)   c                 C   sH   |j D ]}|tv rt| | v r| t|    S || v r!| |   S qd S r   )Ú__mro__Ú_prefix_dict)Zdict_r/   Zsuper_r   r   r   Ú_get_convention‹   s   
ÿrY   c                 C   s~   |j }t|jt| ƒƒ}t| jtƒr| jS |d ur7t| jtƒs7| jd u s,d|v s,| jtu r7t|t| ||jƒ ƒS |tu r=d S d S )NZconstraint_name)	ÚmetadatarY   Znaming_conventionÚtyper   r   r   r   r   )r   r   rZ   r   r   r   r   Ú_constraint_name_for_table–   s,   ÿ
þüûú	ÿÿÿr\   Z'_sa_event_column_added_to_pk_constraintc                 C   s2   | j r| j}d | _t| |ƒ}|r|| _d S d S d S r   )Z_implicit_generatedr   r   r\   )Zpk_constraintr+   r   Únewnamer   r   r   Ú_column_added_to_pk_constraint­   s   

÷r^   Úafter_parent_attachc                    sh   t |tƒrt |d‡ fdd„¡ d S t |tƒr0t ˆ jtƒs"ˆ jtu r$d S tˆ |ƒ}|r2|ˆ _d S d S d S )Nr_   c                    s
   t ˆ |ƒS r   )Ú_constraint_name)r+   r   ©r   r   r   Ú<lambda>É   s   
 z"_constraint_name.<locals>.<lambda>)	r   r   r   Úlistenr   r   r   r   r\   )r   r   r]   r   ra   r   r`   ½   s   

ý


úr`   )Ú__doc__rB   r    r   r!   r   r   Zschemar   r   r   r	   r
   r   r   r   r   r   Úobjectr   rX   rY   r\   Zlistens_forr^   r`   r   r   r   r   Ú<module>   s>   eû	ÿ


