U
    d[                     @   s  d dl mZ d dlmZ d dlmZ d dlmZmZ d dl	m
Z
 d dlmZ ddlmZmZmZmZmZ 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G dd de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G dd de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!G d'd( d(e Z"G d)d* d*e Z#G d+d, d,e Z$G d-d. d.e Z%d/S )0    )models)	Operation)
ModelState)field_referencesresolve_relation)normalize_together)cached_property   )AddField
AlterFieldFieldOperationRemoveFieldRenameFieldc                 C   s6   t  }|D ]&}||kr&td|| f || q
d S )Nz4Found duplicate value %s in CreateModel %s argument.)set
ValueErroradd)Zarg_nameobjsZ	used_valsval r   J/tmp/pip-unpacked-wheel-7vj2equ7/django/db/migrations/operations/models.py_check_for_duplicates   s    
r   c                       s@   e Zd Zdd Zedd Zdd Z fddZd	d
 Z  Z	S )ModelOperationc                 C   s
   || _ d S Nname)selfr   r   r   r   __init__   s    zModelOperation.__init__c                 C   s
   | j  S r   )r   lowerr   r   r   r   
name_lower   s    zModelOperation.name_lowerc                 C   s   |  | jkS r   r   r   r   r   	app_labelr   r   r   references_model   s    zModelOperation.references_modelc                    s   t  ||p| ||S r   )superreducecan_reduce_throughr   	operationr"   	__class__r   r   r%       s     zModelOperation.reducec                 C   s   | | j| S r   )r#   r   r'   r   r   r   r&   %   s    z!ModelOperation.can_reduce_through)
__name__
__module____qualname__r   r   r   r#   r%   r&   __classcell__r   r   r)   r   r      s   
r   c                       st   e Zd ZdZdddgZd fdd	Zdd	 Zd
d Zdd Zdd Z	dd Z
edd Zdd Z fddZ  ZS )CreateModelzCreate a model's table.fieldsoptionsmanagersNc                    sz   || _ |pi | _|ptjf| _|p$g | _t | tddd | j D  tddd | jD  tddd | jD  d S )Nr0   c                 s   s   | ]\}}|V  qd S r   r   .0r   _r   r   r   	<genexpr>6   s     z'CreateModel.__init__.<locals>.<genexpr>basesc                 s   s6   | ].}t |d r|jjnt|tr*| n|V  qdS )_metaN)hasattrr8   Zlabel_lower
isinstancestrr   )r4   baser   r   r   r6   9   s   

r2   c                 s   s   | ]\}}|V  qd S r   r   r3   r   r   r   r6   B   s     )	r0   r1   r   Modelr7   r2   r$   r   r   )r   r   r0   r1   r7   r2   r)   r   r   r   .   s    

zCreateModel.__init__c                 C   sn   | j | jd}| jr| j|d< | jr<| jtjfkr<| j|d< | jr`| jdt fgkr`| j|d< | jj	g |fS )N)r   r0   r1   r7   Zobjectsr2   )
r   r0   r1   r7   r   r=   r2   Managerr*   r-   r   kwargsr   r   r   deconstructD   s    


zCreateModel.deconstructc              
   C   s6   | t|| jt| jt| jt| jt| j	 d S r   )
Z	add_modelr   r   listr0   dictr1   tupler7   r2   r   r"   stater   r   r   state_forwardsQ   s    zCreateModel.state_forwardsc                 C   s.   |j || j}| |jj|r*|| d S r   apps	get_modelr   allow_migrate_model
connectionaliasZcreate_modelr   r"   schema_editor
from_stateto_statemodelr   r   r   database_forwards]   s    zCreateModel.database_forwardsc                 C   s.   |j || j}| |jj|r*|| d S r   rI   rJ   r   rK   rL   rM   Zdelete_modelrN   r   r   r   database_backwardsb   s    zCreateModel.database_backwardsc                 C   s    d| j ddrdnd| jf S )NzCreate %smodel %sproxyFzproxy  )r1   getr   r   r   r   r   describeg   s    zCreateModel.describec                 C   s   | j S r   r   r   r   r   r   migration_name_fragmentm   s    z#CreateModel.migration_name_fragmentc                 C   s   |  }|| jkrdS ||f}| jD ]4}|tjk	r$t|tjjtfr$t	|||kr$ dS q$| j
D ] \}}t|| jf||r` dS q`dS )NTF)r   r   r7   r   r=   r:   r<   Z	ModelBaser;   r   r0   r   )r   r   r"   r   Zreference_model_tupler<   _namefieldr   r   r   r#   q   s(    

  zCreateModel.references_modelc                    sH  t  tr(| j jkr(| jdds(g S t  tr\| j jkr\t j| j	| j| j
| jdgS t  tr| j jkr| j j} jD ]}| jkr||d  qt| j| j	|| j
| jdgS t  t r| j jk rt| j| j	| j| j
 jdgS t  tr8| j jkr8t| j| j	| j j ji| j
| jdgS t  trz| j jkrzt| j| j	| jd ji| j
| jdgS t  tr:| j jkr:t  trt| j| j	 j jfg | j| j
| jdgS t  trt| j fdd| j	D | j| j
| jdgS t  tr| j }dD ]B}||d }|rttt fdd	|D }|r|||< q|d}| jkr~|d= t| j fd
d| j	D || j
| jdgS t  t r:| j }dD ],}||}|r fdd|D ||< q|d}| j!kr j|d< t| j fdd| j	D || j
| jdgS t" # |S )NrV   F)r0   r1   r7   r2   order_with_respect_toc                    s(   g | ] \}}|| j kr jn|fqS r   )r   r]   r4   nvr(   r   r   
<listcomp>   s   z&CreateModel.reduce.<locals>.<listcomp>)unique_togetherindex_togetherc                 3   s$   | ]}t  fd d|D V  qdS )c                 3   s   | ]}| j kr|V  qd S r   rZ   r4   frb   r   r   r6      s    
 z/CreateModel.reduce.<locals>.<genexpr>.<genexpr>NrD   r4   r0   rb   r   r   r6      s   z%CreateModel.reduce.<locals>.<genexpr>c                    s&   g | ]\}}|   jkr||fqS r   r    r_   rb   r   r   rc     s   c                    s"   h | ]}t  fd d|D qS )c                 3   s"   | ]}| j kr jn|V  qd S r   old_namenew_namerf   rb   r   r   r6     s   z/CreateModel.reduce.<locals>.<setcomp>.<genexpr>rh   ri   rb   r   r   	<setcomp>  s   z%CreateModel.reduce.<locals>.<setcomp>c                    s(   g | ] \}}| j kr jn||fqS r   rj   r_   rb   r   r   rc   )  s   )$r:   DeleteModelr   r1   rX   RenameModelold_name_lowerr/   rl   r0   r7   r2   AlterModelOptionsALTER_OPTION_KEYSpopr   AlterModelManagersAlterTogetherOptionOperationoption_nameoption_valueAlterOrderWithRespectTor^   r   model_name_lowerr
   r]   r   r   copyr   filterboolr   rk   r$   r%   )r   r(   r"   r1   keyrv   optionr^   r)   rb   r   r%      s,   











 
	










zCreateModel.reduce)NNN)r+   r,   r-   __doc__serialization_expand_argsr   rA   rG   rS   rU   rY   propertyr[   r#   r%   r.   r   r   r)   r   r/   )   s   

r/   c                   @   sL   e Zd ZdZdd Zdd Zdd Zdd	 Zd
d Zdd Z	e
dd ZdS )rn   zDrop a model's table.c                 C   s   d| j i}| jjg |fS Nr   )r   r*   r-   r?   r   r   r   rA   8  s     zDeleteModel.deconstructc                 C   s   | || j d S r   )Zremove_modelr   rE   r   r   r   rG   >  s    zDeleteModel.state_forwardsc                 C   s.   |j || j}| |jj|r*|| d S r   rT   rN   r   r   r   rS   A  s    zDeleteModel.database_forwardsc                 C   s.   |j || j}| |jj|r*|| d S r   rH   rN   r   r   r   rU   F  s    zDeleteModel.database_backwardsc                 C   s   dS )NTr   r!   r   r   r   r#   K  s    zDeleteModel.references_modelc                 C   s
   d| j  S )NzDelete model %sr   r   r   r   r   rY   P  s    zDeleteModel.describec                 C   s
   d| j  S )Nz	delete_%srZ   r   r   r   r   r[   S  s    z#DeleteModel.migration_name_fragmentN)r+   r,   r-   r   rA   rG   rS   rU   r#   rY   r   r[   r   r   r   r   rn   5  s   rn   c                       s   e Zd ZdZ fddZe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edd Z fddZ  ZS )ro   zRename a model.c                    s   || _ || _t | d S r   )rk   rl   r$   r   )r   rk   rl   r)   r   r   r   [  s    zRenameModel.__init__c                 C   s
   | j  S r   rk   r   r   r   r   r   rp   `  s    zRenameModel.old_name_lowerc                 C   s
   | j  S r   rl   r   r   r   r   r   new_name_lowerd  s    zRenameModel.new_name_lowerc                 C   s   | j | jd}| jjg |fS )Nrj   )rk   rl   r*   r-   r?   r   r   r   rA   h  s    zRenameModel.deconstructc                 C   s   | || j| j d S r   )Zrename_modelrk   rl   rE   r   r   r   rG   o  s    zRenameModel.state_forwardsc                 C   s<  |j || j}| |jj|r8|j || j}|||jj	|jj	 |jj
D ]`}|j|krn|}|| jf}	n|j}|jjj|jjjf}	|j j|	 j|jj}
|||j|
 qPt|jj|jj}|D ]n\}}|j|jks|jjjjsq|jj}|jj}|||jj	|jj	 |||j|jj|j|jj qd S r   )rI   rJ   rl   rK   rL   rM   rk   alter_db_tabler8   db_tableZrelated_objectsZrelated_modelr   r"   
model_name	get_fieldr]   r   Zalter_fieldziplocal_many_to_manyrR   remote_fieldthroughauto_created)r   r"   rO   rP   rQ   	new_model	old_modelZrelated_objectrR   Zrelated_keyZto_fieldr0   	old_field	new_fieldZold_m2m_modelZnew_m2m_modelr   r   r   rS   r  s\    
 

zRenameModel.database_forwardsc                 C   s\   | j | j | _| _ | j| j | _| _| |||| | j | j | _| _ | j| j | _| _d S r   )rp   r   rk   rl   rS   r   r"   rO   rP   rQ   r   r   r   rU     s    

zRenameModel.database_backwardsc                 C   s   |  | jkp|  | jkS r   )r   rp   r   r!   r   r   r   r#     s    zRenameModel.references_modelc                 C   s   d| j | jf S )NzRename model %s to %srj   r   r   r   r   rY     s    zRenameModel.describec                 C   s   d| j | jf S )Nrename_%s_%s)rp   r   r   r   r   r   r[     s    z#RenameModel.migration_name_fragmentc                    sH   t |tr&| j|jkr&t| j|jgS tt| ||pF|	| j| S r   )
r:   ro   r   rp   rk   rl   r$   r   r%   r#   r'   r)   r   r   r%     s    

 zRenameModel.reduce)r+   r,   r-   r   r   r   rp   r   rA   rG   rS   rU   r#   rY   r   r[   r%   r.   r   r   r)   r   ro   X  s   

8
ro   c                       s   e Zd Z fddZ  ZS )ModelOptionOperationc                    s0   t || jtfr"| j|jkr"|gS t ||S r   )r:   r*   rn   r   r$   r%   r'   r)   r   r   r%     s    
zModelOptionOperation.reduce)r+   r,   r-   r%   r.   r   r   r)   r   r     s   r   c                       sT   e Zd ZdZ fddZdd Zdd Zdd	 Zd
d Zdd Z	e
dd Z  ZS )AlterModelTablezRename a model's table.c                    s   || _ t | d S r   )tabler$   r   )r   r   r   r)   r   r   r     s    zAlterModelTable.__init__c                 C   s   | j | jd}| jjg |fS )Nr   r   )r   r   r*   r-   r?   r   r   r   rA     s    zAlterModelTable.deconstructc                 C   s   | || jd| ji d S )Nr   )alter_model_optionsr   r   rE   r   r   r   rG     s    zAlterModelTable.state_forwardsc           	      C   s   |j || j}| |jj|r|j || j}|||jj|jj t	|jj
|jj
D ]6\}}|jjjjrX||jj|jjjj|jjjj qXd S r   )rI   rJ   r   rK   rL   rM   r   r8   r   r   r   r   r   r   )	r   r"   rO   rP   rQ   r   r   r   r   r   r   r   rS     s$     

z!AlterModelTable.database_forwardsc                 C   s   |  ||||S r   rS   r   r   r   r   rU     s    z"AlterModelTable.database_backwardsc                 C   s   d| j | jd k	r| jndf S )NzRename table for %s to %sz	(default)r   r   r   r   r   rY   	  s    zAlterModelTable.describec                 C   s
   d| j  S )Nzalter_%s_tablerZ   r   r   r   r   r[     s    z'AlterModelTable.migration_name_fragment)r+   r,   r-   r   r   rA   rG   rS   rU   rY   r   r[   r.   r   r   r)   r   r     s   r   c                       st   e Zd ZdZ fddZedd Zdd Zdd	 Zd
d Z	dd Z
dd Zdd Zedd Z fddZ  ZS )ru   Nc                    s.   |rt t|}t| | j| t | d S r   )r   r   setattrrv   r$   r   )r   r   rw   r)   r   r   r     s    z%AlterTogetherOptionOperation.__init__c                 C   s   t | | jS r   )getattrrv   r   r   r   r   rw     s    z)AlterTogetherOptionOperation.option_valuec                 C   s    d| j | j| ji}| jjg |fS r   )r   rv   rw   r*   r-   r?   r   r   r   rA   !  s      z(AlterTogetherOptionOperation.deconstructc                 C   s   | || j| j| ji d S r   )r   r   rv   rw   rE   r   r   r   rG   (  s
    
z+AlterTogetherOptionOperation.state_forwardsc                 C   sl   |j || j}| |jj|rh|j || j}t|d| j }||t|j| jt	 t|j| jt	  d S )Nzalter_%s)
rI   rJ   r   rK   rL   rM   r   rv   r8   r   )r   r"   rO   rP   rQ   r   r   Zalter_togetherr   r   r   rS   /  s    z.AlterTogetherOptionOperation.database_forwardsc                 C   s   |  ||||S r   r   r   r   r   r   rU   :  s    z/AlterTogetherOptionOperation.database_backwardsc                    s,   |  ||o*| j p*t fdd| jD S )Nc                 3   s   | ]} |kV  qd S r   r   ri   r   r   r   r6   @  s     z@AlterTogetherOptionOperation.references_field.<locals>.<genexpr>)r#   rw   anyr   r   r   r"   r   r   r   references_field=  s    z-AlterTogetherOptionOperation.references_fieldc                 C   s   d| j | jt| jpdf S )Nz"Alter %s for %s (%s constraint(s))rW   )rv   r   lenrw   r   r   r   r   rY   C  s
    z%AlterTogetherOptionOperation.describec                 C   s   d| j | jf S )Nzalter_%s_%s)r   rv   r   r   r   r   r[   J  s    z4AlterTogetherOptionOperation.migration_name_fragmentc                    s(   t  ||p&t|to&t|t| k	S r   )r$   r&   r:   ru   typer'   r)   r   r   r&   N  s    
z/AlterTogetherOptionOperation.can_reduce_through)r+   r,   r-   rv   r   r   rw   rA   rG   rS   rU   r   rY   r   r[   r&   r.   r   r   r)   r   ru     s   

ru   c                       s$   e Zd ZdZdZ fddZ  ZS )AlterUniqueTogetherz|
    Change the value of unique_together to the target one.
    Input value of unique_together must be a set of tuples.
    rd   c                    s   t  || d S r   r$   r   )r   r   rd   r)   r   r   r   ]  s    zAlterUniqueTogether.__init__r+   r,   r-   r   rv   r   r.   r   r   r)   r   r   U  s   r   c                       s$   e Zd ZdZdZ fddZ  ZS )AlterIndexTogetherzz
    Change the value of index_together to the target one.
    Input value of index_together must be a set of tuples.
    re   c                    s   t  || d S r   r   )r   r   re   r)   r   r   r   i  s    zAlterIndexTogether.__init__r   r   r   r)   r   r   a  s   r   c                       s`   e Zd ZdZdZ fddZdd Zdd Zd	d
 Zdd Z	dd Z
dd Zedd Z  ZS )rx   z9Represent a change with the order_with_respect_to option.r^   c                    s   || _ t | d S r   )r^   r$   r   )r   r   r^   r)   r   r   r   r  s    z AlterOrderWithRespectTo.__init__c                 C   s   | j | jd}| jjg |fS )Nr   r^   )r   r^   r*   r-   r?   r   r   r   rA   v  s    z#AlterOrderWithRespectTo.deconstructc                 C   s   | || j| j| ji d S r   )r   r   rv   r^   rE   r   r   r   rG   }  s
    
z&AlterOrderWithRespectTo.state_forwardsc                 C   s   |j || j}| |jj|r|j || j}|jjrV|jjsV|||j	d n6|jjr|jjs|j	d}|
 sd|_||| d S )N_orderr   )rI   rJ   r   rK   rL   rM   r8   r^   Zremove_fieldr   Zhas_defaultdefaultZ	add_field)r   r"   rO   rP   rQ   Zto_model
from_modelr]   r   r   r   rS     s,     
z)AlterOrderWithRespectTo.database_forwardsc                 C   s   |  |||| d S r   r   r   r   r   r   rU     s    z*AlterOrderWithRespectTo.database_backwardsc                 C   s    |  ||o| jd kp|| jkS r   )r#   r^   r   r   r   r   r     s    z(AlterOrderWithRespectTo.references_fieldc                 C   s   d| j | jf S )Nz%Set order_with_respect_to on %s to %sr   r   r   r   r   rY     s    z AlterOrderWithRespectTo.describec                 C   s
   d| j  S )Nzalter_%s_order_with_respect_torZ   r   r   r   r   r[     s    z/AlterOrderWithRespectTo.migration_name_fragment)r+   r,   r-   r   rv   r   rA   rG   rS   rU   r   rY   r   r[   r.   r   r   r)   r   rx   m  s   rx   c                       sn   e Zd ZdZdddddddd	d
ddgZ fddZdd Zdd Zdd Zdd Z	dd Z
edd Z  ZS )rq   z
    Set new model options that don't directly affect the database schema
    (like verbose_name, permissions, ordering). Python code in migrations
    may still need them.
    Zbase_manager_nameZdefault_manager_nameZdefault_related_nameZget_latest_byZmanagedZorderingpermissionsZdefault_permissionsZselect_on_saveZverbose_nameZverbose_name_pluralc                    s   || _ t | d S r   )r1   r$   r   )r   r   r1   r)   r   r   r     s    zAlterModelOptions.__init__c                 C   s   | j | jd}| jjg |fS )N)r   r1   )r   r1   r*   r-   r?   r   r   r   rA     s    zAlterModelOptions.deconstructc                 C   s   | || j| j| j d S r   )r   r   r1   rr   rE   r   r   r   rG     s    z AlterModelOptions.state_forwardsc                 C   s   d S r   r   r   r   r   r   rS     s    z#AlterModelOptions.database_forwardsc                 C   s   d S r   r   r   r   r   r   rU     s    z$AlterModelOptions.database_backwardsc                 C   s
   d| j  S )NzChange Meta options on %sr   r   r   r   r   rY     s    zAlterModelOptions.describec                 C   s
   d| j  S )Nzalter_%s_optionsrZ   r   r   r   r   r[     s    z)AlterModelOptions.migration_name_fragment)r+   r,   r-   r   rr   r   rA   rG   rS   rU   rY   r   r[   r.   r   r   r)   r   rq     s*   rq   c                       sZ   e Zd ZdZdgZ fddZdd Zdd Zd	d
 Zdd Z	dd Z
edd Z  ZS )rt   zAlter the model's managers.r2   c                    s   || _ t | d S r   )r2   r$   r   )r   r   r2   r)   r   r   r     s    zAlterModelManagers.__init__c                 C   s   | j j| j| jgi fS r   )r*   r-   r   r2   r   r   r   r   rA     s    zAlterModelManagers.deconstructc                 C   s   | || j| j d S r   )Zalter_model_managersr   r2   rE   r   r   r   rG     s    z!AlterModelManagers.state_forwardsc                 C   s   d S r   r   r   r   r   r   rS     s    z$AlterModelManagers.database_forwardsc                 C   s   d S r   r   r   r   r   r   rU     s    z%AlterModelManagers.database_backwardsc                 C   s
   d| j  S )NzChange managers on %sr   r   r   r   r   rY     s    zAlterModelManagers.describec                 C   s
   d| j  S )Nzalter_%s_managersrZ   r   r   r   r   r[      s    z*AlterModelManagers.migration_name_fragment)r+   r,   r-   r   r   r   rA   rG   rS   rU   rY   r   r[   r.   r   r   r)   r   rt     s   rt   c                   @   s   e Zd ZdZedd ZdS )IndexOperationZindexesc                 C   s
   | j  S r   )r   r   r   r   r   r   ry     s    zIndexOperation.model_name_lowerN)r+   r,   r-   rv   r   ry   r   r   r   r   r     s   r   c                   @   sL   e Zd ZdZdd Zdd Zdd Zdd	 Zd
d Zdd Z	e
dd ZdS )AddIndexzAdd an index on a model.c                 C   s"   || _ |jstd| || _d S )NzSIndexes passed to AddIndex operations require a name argument. %r doesn't have one.)r   r   r   index)r   r   r   r   r   r   r     s    zAddIndex.__init__c                 C   s   | || j| j d S r   )	add_indexry   r   rE   r   r   r   rG     s    zAddIndex.state_forwardsc                 C   s2   |j || j}| |jj|r.||| j d S r   )rI   rJ   r   rK   rL   rM   r   r   rN   r   r   r   rS     s    zAddIndex.database_forwardsc                 C   s2   |j || j}| |jj|r.||| j d S r   )rI   rJ   r   rK   rL   rM   remove_indexr   rN   r   r   r   rU   !  s    zAddIndex.database_backwardsc                 C   s   | j | jd}| jjg |fS )N)r   r   )r   r   r*   r-   r?   r   r   r   rA   &  s    zAddIndex.deconstructc                 C   sN   | j jr0d| j jddd | j jD | jf S d| j jd| j j| jf S )Nz!Create index %s on %s on model %s, c                 S   s   g | ]}t |qS r   )r;   )r4   Z
expressionr   r   r   rc   5  s     z%AddIndex.describe.<locals>.<listcomp>z*Create index %s on field(s) %s of model %s)r   Zexpressionsr   joinr   r0   r   r   r   r   rY   1  s    zAddIndex.describec                 C   s   d| j | jj f S Nz%s_%s)ry   r   r   r   r   r   r   r   r[   >  s    z AddIndex.migration_name_fragmentNr+   r,   r-   r   r   rG   rS   rU   rA   rY   r   r[   r   r   r   r   r     s   	r   c                   @   sL   e Zd ZdZdd Zdd Zdd Zdd	 Zd
d Zdd Z	e
dd ZdS )RemoveIndexzRemove an index from a model.c                 C   s   || _ || _d S r   r   r   r   r   r   r   r   r   r   F  s    zRemoveIndex.__init__c                 C   s   | || j| j d S r   )r   ry   r   rE   r   r   r   rG   J  s    zRemoveIndex.state_forwardsc                 C   sL   |j || j}| |jj|rH|j|| jf }|| j	}|
|| d S r   )rI   rJ   r   rK   rL   rM   r   ry   get_index_by_namer   r   )r   r"   rO   rP   rQ   rR   from_model_stater   r   r   r   rS   M  s
    zRemoveIndex.database_forwardsc                 C   sL   |j || j}| |jj|rH|j|| jf }|| j	}|
|| d S r   )rI   rJ   r   rK   rL   rM   r   ry   r   r   r   )r   r"   rO   rP   rQ   rR   to_model_stater   r   r   r   rU   T  s
    zRemoveIndex.database_backwardsc                 C   s   | j | jd}| jjg |fS Nr   )r   r   r*   r-   r?   r   r   r   rA   [  s    zRemoveIndex.deconstructc                 C   s   d| j | jf S )NzRemove index %s from %sr   r   r   r   r   r   rY   f  s    zRemoveIndex.describec                 C   s   d| j | j f S Nzremove_%s_%sry   r   r   r   r   r   r   r[   i  s    z#RemoveIndex.migration_name_fragmentNr   r   r   r   r   r   C  s   r   c                       sv   e Zd ZdZdddZedd Zedd Zd	d
 Zdd Z	dd Z
dd Zdd Zedd Z fddZ  ZS )RenameIndexzRename an index.Nc                 C   s<   |s|st d|r |r t d|| _|| _|| _|| _d S )NzHRenameIndex requires one of old_name and old_fields arguments to be set.z;RenameIndex.old_name and old_fields are mutually exclusive.)r   r   rl   rk   
old_fields)r   r   rl   rk   r   r   r   r   r   q  s    zRenameIndex.__init__c                 C   s
   | j  S r   r   r   r   r   r   rp     s    zRenameIndex.old_name_lowerc                 C   s
   | j  S r   r   r   r   r   r   r     s    zRenameIndex.new_name_lowerc                 C   s<   | j | jd}| jr| j|d< | jr.| j|d< | jjg |fS )N)r   rl   rk   r   )r   rl   rk   r   r*   r-   r?   r   r   r   rA     s    

zRenameIndex.deconstructc                 C   sV   | j r<||| jtj| j | jd ||| jtj| j  n|	|| j| j
| j d S )Nr0   r   )r   r   ry   r   Indexrl   Zremove_model_optionsr   rv   rename_indexrk   rE   r   r   r   rG     s$       zRenameIndex.state_forwardsc                    s   |j || j}| |jj|s$d S | jr|j || j  fdd| jD }|j |dd}t|dkrt	dt| j
jd|f tj| j|d d	}n|j|| jf }	|	| j}|j| jkrd S |j|| jf }
|
| j}|||| d S )
Nc                    s   g | ]} j |jqS r   )r8   r   column)r4   r]   r   r   r   rc     s    z1RenameIndex.database_forwards.<locals>.<listcomp>T)Zcolumn_namesr   r	   z.Found wrong number (%s) of indexes for %s(%s).r   r   r   )rI   rJ   r   rK   rL   rM   r   Z_constraint_namesr   r   r8   r   r   r   r   ry   r   rk   r   rl   r   )r   r"   rO   rP   rQ   rR   columnsZmatching_index_nameZ	old_indexr   r   Z	new_indexr   r   r   rS     sB    
  zRenameIndex.database_forwardsc                 C   sf   | j r
d S | j| j | _| _| j| j | _| _| |||| | j| j | _| _| j| j | _| _d S r   )r   rp   r   rk   rl   rS   r   r   r   r   rU     s    

zRenameIndex.database_backwardsc                 C   s>   | j r"d| j  d| j d| j S d| j d| j d| j S )NzRename index z on z to zRename unnamed index for )rk   r   rl   r   r   r   r   r   rY     s
    zRenameIndex.describec                 C   s0   | j rd| j| jf S d| jd| j| jf S )Nr   zrename_%s_%s_%sr5   )rk   rp   r   ry   r   r   r   r   r   r   r[     s    
z#RenameIndex.migration_name_fragmentc                    sP   t |trB| j|jkrB|jrB| j|jkrBt| j|j| j| jdgS t	 
||S )N)rl   rk   r   )r:   r   ry   rk   r   rp   r   rl   r   r$   r%   r'   r)   r   r   r%     s     

zRenameIndex.reduce)NN)r+   r,   r-   r   r   r   rp   r   rA   rG   rS   rU   rY   r   r[   r%   r.   r   r   r)   r   r   n  s   


%

	r   c                   @   sL   e Zd ZdZdd Zdd Zdd Zdd	 Zd
d Zdd Z	e
dd ZdS )AddConstraintconstraintsc                 C   s   || _ || _d S r   r   
constraint)r   r   r   r   r   r   r     s    zAddConstraint.__init__c                 C   s   | || j| j d S r   )add_constraintry   r   rE   r   r   r   rG   
  s    zAddConstraint.state_forwardsc                 C   s2   |j || j}| |jj|r.||| j d S r   )rI   rJ   r   rK   rL   rM   r   r   rN   r   r   r   rS     s    zAddConstraint.database_forwardsc                 C   s2   |j || j}| |jj|r.||| j d S r   )rI   rJ   r   rK   rL   rM   remove_constraintr   rN   r   r   r   rU     s    z AddConstraint.database_backwardsc                 C   s   | j jg | j| jdfS )Nr   )r*   r+   r   r   r   r   r   r   rA     s    zAddConstraint.deconstructc                 C   s   d| j j| jf S )Nz Create constraint %s on model %s)r   r   r   r   r   r   r   rY   !  s    zAddConstraint.describec                 C   s   d| j | jj f S r   )ry   r   r   r   r   r   r   r   r[   '  s    z%AddConstraint.migration_name_fragmentNr+   r,   r-   rv   r   rG   rS   rU   rA   rY   r   r[   r   r   r   r   r     s   
r   c                   @   sL   e Zd ZdZdd Zdd Zdd Zdd	 Zd
d Zdd Z	e
dd ZdS )RemoveConstraintr   c                 C   s   || _ || _d S r   r   r   r   r   r   r   /  s    zRemoveConstraint.__init__c                 C   s   | || j| j d S r   )r   ry   r   rE   r   r   r   rG   3  s    zRemoveConstraint.state_forwardsc                 C   sL   |j || j}| |jj|rH|j|| jf }|| j	}|
|| d S r   )rI   rJ   r   rK   rL   rM   r   ry   get_constraint_by_namer   r   )r   r"   rO   rP   rQ   rR   r   r   r   r   r   rS   6  s
    z"RemoveConstraint.database_forwardsc                 C   sL   |j || j}| |jj|rH|j|| jf }|| j	}|
|| d S r   )rI   rJ   r   rK   rL   rM   r   ry   r   r   r   )r   r"   rO   rP   rQ   rR   r   r   r   r   r   rU   =  s
    z#RemoveConstraint.database_backwardsc                 C   s   | j jg | j| jdfS r   )r*   r+   r   r   r   r   r   r   rA   D  s    zRemoveConstraint.deconstructc                 C   s   d| j | jf S )Nz"Remove constraint %s from model %sr   r   r   r   r   rY   N  s    zRemoveConstraint.describec                 C   s   d| j | j f S r   r   r   r   r   r   r[   Q  s    z(RemoveConstraint.migration_name_fragmentNr   r   r   r   r   r   ,  s   
r   N)&Z	django.dbr   Z$django.db.migrations.operations.baser   Zdjango.db.migrations.stater   Zdjango.db.migrations.utilsr   r   Zdjango.db.models.optionsr   Zdjango.utils.functionalr   r0   r
   r   r   r   r   r   r   r/   rn   ro   r   r   ru   r   r   rx   rq   rt   r   r   r   r   r   r   r   r   r   r   <module>   s8   
  #
3AD76+ )