U
    ovg                     @  s   d 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ZG dd deZG dd deZG dd deZG dd deZeeeeeeiZdS )zRelationship dependencies.

    )annotations   )
attributes)exc)sync)
unitofwork)util)
MANYTOMANY)	MANYTOONE)	ONETOMANY   )sqlc                   @  s   e Zd Zdd Ze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d Zdd Zdd Zd%ddZd d! Zd"d# Zd$S )&DependencyProcessorc                 C  s   || _ |j| _|j| _|j| _|j| _|j| _|j| _|j| _|j| _|j	| _	| jr^t
j| _nt
j| _| jrvt
j| _nt
j| _d| jj|jf | _|j| _| j jstd| j  d S )Nz%s_%sz|Can't build a DependencyProcessor for relationship %s. No target attributes to populate between parent and child are present)propcascademapperparent	secondary	directionpost_updatepassive_deletespassive_updatesenable_typechecksr   PASSIVE_NO_INITIALIZE_passive_delete_flagPASSIVE_OFF_passive_update_flag	_sort_keykeysort_keysynchronize_pairssa_excArgumentError)selfr    r$   =/tmp/pip-unpacked-wheel-uqd9otp_/sqlalchemy/orm/dependency.py__init__   s0    

zDependencyProcessor.__init__c                 C  s   t |j |S N)_direction_to_processorr   )clsr   r$   r$   r%   from_relationship;   s    z%DependencyProcessor.from_relationshipc                 C  s   | j j| j|S )zreturn True if the given object instance has a parent,
        according to the ``InstrumentedAttribute`` handled by this
        ``DependencyProcessor``.

        )r   Zclass_managerget_implr   	hasparentr#   stater$   r$   r%   r,   ?   s    zDependencyProcessor.hasparentc                 C  s   | | d dS )zestablish actions and dependencies related to a flush.

        These actions will operate on all relevant states in
        the aggregate.

        TN)register_preprocessorr#   uowr$   r$   r%   per_property_preprocessorsG   s    z.DependencyProcessor.per_property_preprocessorsc              	   C  sz   t || dd}t || dd}t || jj}t || jj}t || jj}t || jj}| ||||||| d S NFT)r   
ProcessAllSaveUpdateAllr   primary_base_mapperr   	DeleteAllper_property_dependencies)r#   r1   
after_savebefore_deleteparent_saveschild_savesparent_deleteschild_deletesr$   r$   r%   per_property_flush_actionsP   s6        z.DependencyProcessor.per_property_flush_actionsc                 C  s  | j j}t||}t||}|r<t|| dd}d|_nt|| dd}d|_||jkr||jksjt|df|dfg}	d}
nd}
|st|| j	j
}d }}||jkrd}n&t|| j	j
}d }}||jkrd}|D ]}|j| j j||j|r| jntj}|sq|r8t|| d|}|rZt||}n"t|| d|}|rZt||}|
rg }	|D ]\\}}||jkrd}n6|j| \}}|rt||df}nt||df}|	| qh|	D ]"\}}| |||||||| qqdS )zestablish actions and dependencies related to a flush.

        These actions will operate on all relevant states
        individually.    This occurs only if there are cycles
        in the 'aggregated' version of events.

        TFN)NN)r   r6   r   r5   r7   r4   disabledZcyclesAssertionErrorr   base_mappermanagerr   implZget_all_pendingdictr   r   r   ZProcessStateZDeleteStateZSaveUpdateStatestatesappendper_state_dependencies)r#   r1   rF   isdeleteZchild_base_mapperr<   r>   r:   r9   Zchild_actionsZchild_in_cyclesr;   r=   Zparent_in_cyclesr.   Zsum_Zchild_statechildchild_actiondeletedZlistonlychildisdeleter$   r$   r%   per_state_flush_actionsl   s    	
 





z+DependencyProcessor.per_state_flush_actionsc                 C  s   dS NFr$   r#   	uowcommitrF   r$   r$   r%   presort_deletes   s    z#DependencyProcessor.presort_deletesc                 C  s   dS rO   r$   rP   r$   r$   r%   presort_saves   s    z!DependencyProcessor.presort_savesc                 C  s   d S r'   r$   rP   r$   r$   r%   process_deletes   s    z#DependencyProcessor.process_deletesc                 C  s   d S r'   r$   rP   r$   r$   r%   process_saves   s    z!DependencyProcessor.process_savesc                 C  s|   |r
| j rtjtjB }n| jtkr*tj}ntjtjB }|D ]&}||| j	|}|r:|
 s: dS q:|oz| jj oz| j|jkS )NT)r   r   r   INCLUDE_PENDING_MUTATIONSr   r
   ZPASSIVE_NO_FETCH_RELATEDr   get_attribute_historyr   emptyr   Z_is_self_referentialr   Zmappers)r#   rQ   rF   rI   passiveshistoryr$   r$   r%   prop_has_changes   s$    



z$DependencyProcessor.prop_has_changesc                 C  s   | j jr$|d kr$td| j f nn|d k	r| jj|| j ds| jj|ddrttd|j| j | jj| jd ntd|j| j | jjd d S )Nz-Can't flush None value found in collection %s)Zallow_subtypesTaE  Attempting to flush an item of type %(x)s as a member of collection "%(y)s". Expected an object of type %(z)s or a polymorphic subclass of this type. If %(x)s is a subclass of %(z)s, configure mapper "%(zm)s" to load this subtype polymorphically, or set enable_typechecks=False to allow any subtype to be accepted for flush. )xyzZzmzAttempting to flush an item of type %(x)s as a member of collection "%(y)s". Expected an object of type %(z)s or a polymorphic subclass of this type.)r]   r^   r_   )r   uselistr   Z
FlushErrorr   Z_canloadr   class_r-   r$   r$   r%   _verify_canload
  s8     
z#DependencyProcessor._verify_canloadc                 C  s
   t  d S r'   NotImplementedError)r#   r.   rJ   associationrow	clearkeysrQ   r$   r$   r%   _synchronize3  s    z DependencyProcessor._synchronizec                 C  s>   | j jsd S tt| jgdd | j jD  }|d|ftS )Nc                 S  s   g | ]
}|j qS r$   )r   ).0pr$   r$   r%   
<listcomp>;  s     zCDependencyProcessor._get_reversed_processed_set.<locals>.<listcomp>Zreverse_key)r   _reverse_propertytuplesortedr   memoset)r#   r1   Zprocess_keyr$   r$   r%   _get_reversed_processed_set6  s    z/DependencyProcessor._get_reversed_processed_setFc                 C  s8   |D ].}|r|d k	r| |dd | jjD   q4qd S )Nc                 S  s   g | ]\}}|qS r$   r$   )rh   lrr$   r$   r%   rj   C  s     z4DependencyProcessor._post_update.<locals>.<listcomp>)Zregister_post_updater   r    )r#   r.   rQ   relatedis_m2o_deleter]   r$   r$   r%   _post_update?  s     z DependencyProcessor._post_updatec                 C  s
   t  d S r'   rc   r#   rQ   r.   r$   r$   r%   _pks_changedG  s    z DependencyProcessor._pks_changedc                 C  s   d| j j| jf S )Nz%s(%s))	__class____name__r   )r#   r$   r$   r%   __repr__J  s    zDependencyProcessor.__repr__N)F)ry   
__module____qualname__r&   classmethodr*   r,   r2   r?   rN   rR   rS   rT   rU   r\   rb   rg   rp   ru   rw   rz   r$   r$   r$   r%   r      s$   
	r )	
r   c                   @  sL   e Zd Zdd Zdd Zdd Zdd Zd	d
 Zdd Zdd Z	dd Z
dS )OneToManyDPc           
   
   C  s   | j r\t|| jjd}t|| jjd}	|j||f||f||f||	f|	|f|	|fg n6|j||f||f||f||f||f||f||fg d S r3   r   r   PostUpdateAllr   r6   dependenciesupdate)
r#   r1   r;   r<   r=   r>   r9   r:   child_post_updateschild_pre_updatesr$   r$   r%   r8   O  s<    
    z%OneToManyDP.per_property_dependenciesc	                 C  s   | j rt|| jjd}	t|| jjd}
|sl|rL|j||f||	fg q|j||f||f||	fg q|r|j||
f|
|fg q|j||
f|
|fg n<|s|j||f||f||fg n|j||f||fg d S r3   r   )r#   r1   save_parentdelete_parentrK   r9   r:   rI   rM   r   r   r$   r$   r%   rH   x  sZ        z"OneToManyDP.per_state_dependenciesc                 C  s   | j j o| jdk }|D ]}||| j| j}|r|jD ]<}|d k	r:| |dkr:| j jrl|j	|dd q:|	| q:|r|j
D ]}|d k	r|j	|d| jd qqd S )NallFTrI   delete	operationr   )r   r   r   rW   r   r   rL   r,   delete_orphanregister_object	unchangedr   r#   rQ   rF   should_null_fksr.   r[   rJ   r$   r$   r%   rR     s,      

  zOneToManyDP.presort_deletesc              	   C  sd  | d| ft}| jj o$| jdk }|D ]2}| ||}|rF| jrTtjtj	B }ntj
tj	B }||| j|}|r&|jD ] }	|	d k	r||j|	dd| jd q|||j |jD ]t}	| jjs|r|j|	dd| jd q| |	dkr|j|	dd| jd | jd|	D ]\}
}}}|j|dd	 qq|r*|r*|jD ](}	|	d k	r4|j|	d| jd
| jd q4q*d S )Nchildren_addedr   Tadd)Zcancel_deleter   r   Fr   rI   r   r   r   z	pk changer   )rn   ro   r   r   r   rw   r   r   r   rV   r   rW   r   addedr   r   r   rL   r,   r   cascade_iteratorr   )r#   rQ   rF   r   r   r.   pks_changedrY   r[   rJ   cmst_dct_r$   r$   r%   rS     st    





 

zOneToManyDP.presort_savesc              
   C  s   | j s| jdks|d| ft}|D ]}||| j| j}|r$|jD ]H}|d k	rD| |dkrD| 	||d d|d | j rD|rD| 
|||g qD| j s| jjs$t|j|D ]:}|d k	r| 	||d d|d | j r|r| 
|||g qq$d S )Nr   r   FT)r   r   rn   ro   rW   r   r   rL   r,   rg   ru   r   r   r   
difference)r#   rQ   rF   r   r.   r[   rJ   r$   r$   r%   rT     sV      
     

     
  zOneToManyDP.process_deletesc              
   C  s   | j j o| jdk }|D ]}||| jtj}|r|jD ]6}| ||d d|d |d k	r:| j	r:| 
|||g q:|jD ].}|rx| j jsx| |sx| ||d d|d qx| ||r|jD ]}| ||d d|d qqd S )Nr   FT)r   r   r   rW   r   r   r   r   rg   r   ru   rL   r,   rw   r   r   r$   r$   r%   rU   D  s\    

  
     
     
     zOneToManyDP.process_savesc           	   	   C  sp   |}|}|  | |d ks*| js.||r.d S |rHt|| j| jj n$t|| j	|| j| jj|| j
oh| d S r'   )rb   r   
is_deletedr   clearr   r   r    populater   r   )	r#   r.   rJ   re   rf   rQ   r   sourcedestr$   r$   r%   rg   f  s(    
zOneToManyDP._synchronizec                 C  s   t ||| j| jjS r'   r   source_modifiedr   r   r    rv   r$   r$   r%   rw   }  s       zOneToManyDP._pks_changedN)ry   r{   r|   r8   rH   rR   rS   rT   rU   rg   rw   r$   r$   r$   r%   r~   N  s   )AD,"r~   c                   @  sN   e Zd Zdd Zdd Zdd Zdd Zd	d
 Zdd Zdd Z	dddZ
dS )ManyToOneDPc                 C  s.   t | | | jjD ]}|jt| qd S r'   )r   r&   r   Zself_and_descendantsZ_dependency_processorsrG   DetectKeySwitch)r#   r   r   r$   r$   r%   r&     s    zManyToOneDP.__init__c           
   
   C  s   | j rbt|| jjd}t|| jjd}	|j||f||f||f||	f||	f|	|f|	|fg n$|j||f||f||f||fg d S r3   r   r   r   r   r6   r   r   )
r#   r1   r;   r<   r=   r>   r9   r:   parent_post_updatesparent_pre_updatesr$   r$   r%   r8     s8    
    z%ManyToOneDP.per_property_dependenciesc	                 C  s   | j r|sZt|| jjd}	|r:|j||	f|	|fg q|j||f||f||	fg qt|| jjd}
|j||
f|
|f|
|fg nL|s|s|j||f||fg q|j||fg n|r|j||fg d S r3   r   )r#   r1   r   r   rK   r9   r:   rI   rM   r   r   r$   r$   r%   rH     sL        z"ManyToOneDP.per_state_dependenciesc                 C  s   | j js| j jr|D ]}||| j| j}|r| j jr@| }n| }|D ]P}|d krZqL|j|dd| j	d | j
d|}|D ]\}}	}
}|j|
dd qqLqd S )NTr   r   r   )r   r   r   rW   r   r   sumZnon_deletedr   r   r   r   )r#   rQ   rF   r.   r[   ZtodeleterJ   tr   r   r   r   r$   r$   r%   rR     s.      
zManyToOneDP.presort_deletesc                 C  s   |D ]}|j |d| jd | jjr||| j| j}|r|jD ]T}| |dkr>|j |dd| jd | j	
d|}|D ]\}}}	}
|j |	dd qvq>qd S )Nr   r   FTr   r   r   )r   r   r   r   rW   r   r   rL   r,   r   r   )r#   rQ   rF   r.   r[   rJ   r   r   r   r   r   r$   r$   r%   rS      s(      
zManyToOneDP.presort_savesc                 C  sn   | j rj| jjsj| jdksj|D ]L}| |d d d| |r| j r||| j| j}|r| j|||	 dd qd S )Nr   T)rt   )
r   r   r   r   rg   rW   r   r   ru   r   )r#   rQ   rF   r.   r[   r$   r$   r%   rT     s*    
     zManyToOneDP.process_deletesc              
   C  s~   |D ]t}| || jtj}|r|jrF|jD ]}| ||d d|d q*n|jr`| |d d d|d | jr| |||	  qd S )NFr   Tr   )
rW   r   r   r   r   rg   rL   r   ru   r   )r#   rQ   rF   r.   r[   rJ   r$   r$   r%   rU   )  s8      
          zManyToOneDP.process_savesNc              	   C  s   |d ks| j s||rd S |d k	rX|d k	rX|j|sXtdt||| jf  d S |sd|d krzt	
|| j| jj n(| | t	|| j|| j| jj|d d S )NGObject of type %s not in session, %s operation along '%s' won't proceedF)r   r   session_contains_stater   warn
mapperutilstate_class_strr   r   r   r   r    rb   r   r   r#   r.   rJ   re   rf   rQ   r   r$   r$   r%   rg   ;  s<    	

zManyToOneDP._synchronize)N)ry   r{   r|   r&   r8   rH   rR   rS   rT   rU   rg   r$   r$   r$   r%   r     s   '8 r   c                   @  sh   e Zd 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d ZdS )r   a  For many-to-one relationships with no one-to-many backref,
    searches for parents through the unit of work when a primary
    key has changed and updates them.

    Theoretically, this approach could be expanded to support transparent
    deletion of objects referenced via many-to-one as well, although
    the current attribute system doesn't do enough bookkeeping for this
    to be efficient.

    c                 C  s<   | j jr,| jrd S ddd | j jD kr,d S || d d S )NFc                 s  s   | ]}|j V  qd S r'   )r   )rh   r   r$   r$   r%   	<genexpr>u  s   z=DetectKeySwitch.per_property_preprocessors.<locals>.<genexpr>)r   rk   r   r/   r0   r$   r$   r%   r2   p  s    z*DetectKeySwitch.per_property_preprocessorsc                 C  s6   t || jj}t || dd}|j||fg d S rO   )r   r5   r   rB   r4   r   r   )r#   r1   r;   r9   r$   r$   r%   r?   }  s    z*DetectKeySwitch.per_property_flush_actionsc                 C  s   d S r'   r$   )r#   r1   rF   rI   r$   r$   r%   rN     s    z'DetectKeySwitch.per_state_flush_actionsc                 C  s   d S r'   r$   rP   r$   r$   r%   rR     s    zDetectKeySwitch.presort_deletesc                 C  s   | j s| || d S r'   )r   _process_key_switches)r#   r1   rF   r$   r$   r%   rS     s    zDetectKeySwitch.presort_savesc                 C  s"   |s| j r| ||}t|S dS rO   )r   _key_switchersbool)r#   r1   rF   rI   dr$   r$   r%   r\     s    
z DetectKeySwitch.prop_has_changesc                 C  s   dst d S rO   )rA   rP   r$   r$   r%   rT     s    zDetectKeySwitch.process_deletesc                 C  s   | j s
t| || d S r'   )r   rA   r   rP   r$   r$   r%   rU     s    
zDetectKeySwitch.process_savesc                 C  sZ   | d| fdd \}}||}|D ].}||kr&| ||rJ|| q&|| q&|S )NZpk_switchersc                   S  s   t  t  fS r'   )ro   r$   r$   r$   r%   <lambda>      z0DetectKeySwitch._key_switchers.<locals>.<lambda>)rn   unionrw   r   )r#   r1   rF   ZswitchedZnotswitchedZ	allstatesrZ   r$   r$   r%   r     s     
zDetectKeySwitch._key_switchersc           	   
   C  s   |  ||}|r|jj D ]}t|j| jjs2q|j}|| j	j
||| jd}|tjk	r|d k	r| jjr||srq|d }n|}t|}||kr||d| j t|| j|| j| jj|| j qd S )N)rY   r   F)r   r   Zidentity_mapZ
all_states
issubclassra   r   rE   r+   r   getr   r   ZPASSIVE_NO_RESULTr   r`   Zinstance_stater   r   r   r   r   r    )	r#   ZdeplistrQ   Z	switchersr.   Zdict_rs   Zrelated_objZrelated_stater$   r$   r%   r     sH      

  z%DetectKeySwitch._process_key_switchesc                 C  s    t |jot||| j| jjS r'   )r   r   r   r   r   r   r    rv   r$   r$   r%   rw     s       zDetectKeySwitch._pks_changedN)ry   r{   r|   __doc__r2   r?   rN   rR   rS   r\   rT   rU   r   r   rw   r$   r$   r$   r%   r   d  s   %r   c                   @  sT   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S )ManyToManyDPc              
   C  s:   |j ||f||f||f||f||f||f||fg d S r'   r   r   )r#   r1   r;   r<   r=   r>   r9   r:   r$   r$   r%   r8     s    
z&ManyToManyDP.per_property_dependenciesc	           	      C  sX   |s<|r"|j ||f||fg qT|j ||f||fg n|j ||f||fg d S r'   r   )	r#   r1   r   r   rK   r9   r:   rI   rM   r$   r$   r%   rH     s    z#ManyToManyDP.per_state_dependenciesc                 C  s&   | j s"|D ]}||| j| j q
d S r'   )r   rW   r   r   )r#   rQ   rF   r.   r$   r$   r%   rR     s      zManyToManyDP.presort_deletesc           
      C  s   | j s.|D ]"}| ||r
||| jtj}q
| jjs:d S |D ]r}||| jtj}|r>|j	D ]P}| 
|dkr^|j|dd| jd | jd|D ]\}}}}	|j|dd qq^q>d S )NFTr   r   r   )r   rw   rW   r   r   r   r   r   r   rL   r,   r   r   r   r   )
r#   rQ   rF   r.   r[   rJ   r   r   r   r   r$   r$   r%   rS     s<        
 zManyToManyDP.presort_savesc              
     s   g }g }g }|  |}t }|D ] | | j| j}|r | D ]F}	|	d ksB|d k	rd |	f|krdqBi }
|  |	|
d|ds~qB||
 qB| fdd| D  q |d k	r|| | 	|||| d S )NFr   c                 3  s   | ]}| fV  qd S r'   r$   rh   r   r.   r$   r%   r   [  s     z/ManyToManyDP.process_deletes.<locals>.<genexpr>)
rp   ro   rW   r   r   Z	non_addedrg   rG   r   	_run_crud)r#   rQ   rF   secondary_deletesecondary_insertsecondary_update	processedtmpr[   rJ   re   r$   r   r%   rT   <  sN    
  

   zManyToManyDP.process_deletesc              
     s  g }g }g }|  |}t }|D ]F | j o8| | }|rLtjtjB }	ntjtjB }	| | j	|	}
|
r |
j
D ]>}|d k	r |f|krqri }|  ||d|dsqr|| qr|
jD ]>}|d k	r҈ |f|krqi }|  ||d|dsq|| q| fdd|
j
|
j D  |r |
jD ]D}i }t | j|d| jj t|| j|d| jj || q"q |d k	r~|| | |||| d S )NFr   r   c                 3  s   | ]}| fV  qd S r'   r$   r   r   r$   r%   r     s     z-ManyToManyDP.process_saves.<locals>.<genexpr>old_)rp   ro   r   rw   r   r   rV   r   rW   r   r   rg   rG   rL   r   r   r   r   r   r    r   secondary_synchronize_pairsr   )r#   rQ   rF   r   r   r   r   r   Zneed_cascade_pksrY   r[   rJ   re   r$   r   r%   rU   d  s    

 
     
 


   zManyToManyDP.process_savesc                   s  |j | j}|r|d  | j tj fdd| jjD  }|	||}|
 r|jt|krtd| jjt||jf |r|d  | j tj fdd| jjD  }|	||}|
 r|jt|krtd| jjt||jf |r| j }|	|| d S )Nr   c                   s,   g | ]$}|j  kr|tj|j |jd kqS )type_r   r   Z	bindparamtyper   re   r$   r%   rj     s   
z*ManyToManyDP._run_crud.<locals>.<listcomp>zRDELETE statement on table '%s' expected to delete %d row(s); Only %d were matched.c                   s0   g | ](}|j  kr|tjd |j  |jdkqS )r   r   r   r   r   r$   r%   rj     s   
zRUPDATE statement on table '%s' expected to update %d row(s); Only %d were matched.)Ztransaction
connectionr   r   r   wherer   and_r   executeZsupports_sane_multi_rowcountZrowcountlenr   ZStaleDataErrordescriptionr   insert)r#   rQ   r   r   r   r   Z	statementresultr$   r   r%   r     s`    

	


	

zManyToManyDP._run_crudc                 C  s   |  | |d krdS |d k	rP|j|sP|jsLtdt||| jf  dS t	
|| j|| jj t	
|| j|| jj dS )NFr   T)rb   r   r   rL   r   r   r   r   r   r   Zpopulate_dictr   r    r   r   r   r$   r$   r%   rg     s0    
   zManyToManyDP._synchronizec                 C  s   t ||| j| jjS r'   r   rv   r$   r$   r%   rw     s       zManyToManyDP._pks_changedN)ry   r{   r|   r8   rH   rR   rS   rT   rU   r   rg   rw   r$   r$   r$   r%   r     s   "(M= r   N)r   
__future__r    r   r   r   r   r   r   Z
interfacesr	   r
   r   r!   r   r   r~   r   r   r   r(   r$   r$   r$   r%   <module>
   s>     3  7 bu  >   