U
    ovg                     @  sp   d Z ddlmZ ddlmZ ddlmZ ddlmZ dd Z	d	d
 Z
dd Zdd Zdd Zdd Zdd ZdS )zgprivate module containing functions used for copying data
between instances based on join conditions.

    )annotations   )exc)util)PassiveFlagc                 C  s  | j }|j }|D ]\}	}
z(|j|	 }| j|j j| |tj}W n6 tj	k
rv } zt
d||	||
| W 5 d }~X Y nX z(|j|
 }|j|j j|||d  W n6 tj	k
r } zt
d||	||
| W 5 d }~X Y nX |r|	jr|
jr|
|	rd|jd||
f< qd S )NFTZpk_cascaded)dict_columntopropertymanagerkeyimplgetr   PASSIVE_OFFr   UnmappedColumnError_raise_col_to_propsetprimary_keyZ
references
attributes)sourcesource_mapperdestdest_mappersynchronize_pairs	uowcommitZflag_cascaded_pkssource_dictZ	dest_dictlrpropvalueerr r   7/tmp/pip-unpacked-wheel-uqd9otp_/sqlalchemy/orm/sync.pypopulate   s4    	
  $
$r!   c                 C  s   |D ]\}}z|j | }| |j }W n6 tjk
rZ } ztd||||| W 5 d }~X Y nX z|j | }|| |j< W q tjk
r } ztd||||| W 5 d }~X Y qX qd S )NFT)r   r
   r   r   r   )r   r   r   r   r   r   r   r   r   r   r    bulk_populate_inherit_keysA   s    
$
r"   c                 C  s   |D ]\}}|j rJ|| | j|tjkrJtd| d| dt|  dz|| | j|d  W q tj	k
r } zt
dd |||| W 5 d }~X Y qX qd S )NzDependency rule on column 'z)' tried to blank-out primary key column 'z' on instance ''T)r   _get_state_attr_by_columnr   orm_utilZ	_none_setAssertionErrorZ	state_strZ_set_state_attr_by_columnr   r   r   )r   r   r   r   r   r   r   r   r    clearQ   s    r'   c           
      C  s   |D ]\}}z*| |  |}|j| | j|tjd}W n6 tjk
rl }	 ztd||d ||	 W 5 d }	~	X Y nX |||j	< ||||j	 < qd S N)ZpassiveF)
Z_get_committed_attr_by_columnobjr$   r   r   r   r   r   r   r
   )
r   r   r   Z
old_prefixr   r   r   Zoldvaluer   r   r   r   r    updatec   s         
$
r*   c                 C  sn   |D ]d\}}z|j | | j|tjd}W n6 tjk
r\ } ztd||d || W 5 d }~X Y nX |||j< qd S r(   )r$   r   r   r   r   r   r   r
   )r   r   Zdict_r   r   r   r   r   r   r   r    populate_dictr   s       
$r+   c           	      C  sz   |D ]p\}}z|j | }W n6 tjk
rP } ztd||d|| W 5 d}~X Y nX | ||jtj}t|j	r dS qdS )zpreturn true if the source object has changes from an old to a
    new value on the given synchronize pairs

    FNT)
r   r   r   r   Zget_attribute_historyr
   r   ZPASSIVE_NO_INITIALIZEboolZdeleted)	r   r   r   r   r   r   r   r   historyr   r   r    source_modified~   s    $  
r.   c                 C  s4   | rt d||f |nt d|||f |d S )NzCan't execute sync rule for destination column '%s'; mapper '%s' does not map this column.  Try using an explicit `foreign_keys` collection which does not include this column (or use a viewonly=True relation).zCan't execute sync rule for source column '%s'; mapper '%s' does not map this column.  Try using an explicit `foreign_keys` collection which does not include destination column '%s' (or use a viewonly=True relation).)r   r   )Zisdestr   Zsource_columnr   Zdest_columnr   r   r   r    r      s    r   N)__doc__
__future__r    r   r   r%   baser   r!   r"   r'   r*   r+   r.   r   r   r   r   r    <module>
   s   +