a
    LcòfÎž  ã                   @   sV  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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" d dl#m$Z$ ddl%m&Z& ddl'm(Z( d'dd„Z)dd„ Z*dd„ Z+dd„ Z,G dd „ d ƒZ-G d!d"„ d"eƒZ.G d#d$„ d$e
ƒZ/G d%d&„ d&ƒZ0dS )(é    N)Údefaultdict)Úcontextmanager)Úpartial)Ú	AppConfig)ÚApps©Úapps)Úsettings)ÚFieldDoesNotExist)Úmodels)Úfield_is_referencedÚget_references)ÚNOT_PROVIDED)ÚRECURSIVE_RELATIONSHIP_CONSTANT)ÚDEFAULT_NAMESÚnormalize_together)Úmake_model_tuple)Úcached_property)Úimport_string)Úget_docs_versioné   )ÚInvalidBasesError)Úresolve_relationÚ c                 C   sJ   t | tƒr6|  dd¡}t|ƒdkr*t|ƒS ||d fS | jj| jjfS d S )NÚ.r   é   r   )Ú
isinstanceÚstrÚsplitÚlenÚtupleÚ_metaÚ	app_labelÚ
model_name)Úmodelr"   r   © r%   úW/home/httpd/docs/test/DocsMgr/lib/python3.9/site-packages/django/db/migrations/state.pyÚ_get_app_label_and_model_name   s    
 r'   c                 C   s†   dd„ |   ¡ D ƒ}tƒ }| jjddd�D ]8}|jr(|jdur(t|jtƒs(| |j	¡ | 
|j¡ q(| j}|jr‚| |v r‚| 
|j¡ |S )zEReturn all models that have a direct relationship to the given model.c                 S   s   g | ]}t |tjƒr|‘qS r%   )Ú
issubclassr   ÚModel)Ú.0Úsubclassr%   r%   r&   Ú
<listcomp>#   s   þz'_get_related_models.<locals>.<listcomp>T)Zinclude_parentsZinclude_hiddenN)Ú__subclasses__Úsetr!   Z
get_fieldsÚis_relationÚrelated_modelr   r   Úaddr$   ÚappendÚproxyZconcrete_model)ÚmÚrelated_modelsZrelated_fields_modelsÚfÚoptsr%   r%   r&   Ú_get_related_models!   s"    þÿþ
ýr8   c                 C   s   dd„ t | ƒD ƒS )zq
    Return a list of typical (app_label, model_name) tuples for all related
    models for the given model.
    c                 S   s   h | ]}|j j|j jf’qS r%   )r!   r"   r#   )r*   Úrel_modr%   r%   r&   Ú	<setcomp>>   s   ÿz,get_related_models_tuples.<locals>.<setcomp>)r8   ©r$   r%   r%   r&   Úget_related_models_tuples9   s    þr<   c                 C   sj   t ƒ }t| ƒ}|D ]@}|jj|jj }}||f|v r6q| ||f¡ | t|ƒ¡ q|| jj| jjfh S )aå  
    Return all models that have a direct or indirect relationship
    to the given model.

    Relationships are either defined by explicit relational fields, like
    ForeignKey, ManyToManyField or OneToOneField, or by inheriting from another
    model (a superclass is related to its subclasses, but not vice versa). Note,
    however, that a model inheriting from a concrete model is also related to
    its superclass through the implicit *_ptr OneToOneField on the subclass.
    )r.   r8   r!   r"   r#   r1   Úextend)r$   ÚseenÚqueuer9   Úrel_app_labelÚrel_model_namer%   r%   r&   Úget_related_models_recursiveD   s    þrB   c                   @   sB  e Zd ZdZdKdd„Zedd„ ƒZdd„ Zd	d
„ Zdd„ Z	dLdd„Z
dd„ Zdd„ Zdd„ Zdd„ Zdd„ Zdd„ Zdd„ Zdd„ Zdd „ Zd!d"„ Zd#d$„ Zd%d&„ Zd'd(„ ZdMd*d+„ZdNd,d-„ZdOd/d0„Zd1d2„ Zd3d4„ ZdPd5d6„ZdQd7d8„Zd9d:„ Zd;d<„ Z d=d>„ Z!d?d@„ Z"dAdB„ Z#dCdD„ Z$e%dEdF„ ƒZ&e'dGdH„ ƒZ(dIdJ„ Z)dS )RÚProjectStatez½
    Represent the entire project's overall state. This is the item that is
    passed around - do it here rather than at the app level so that cross-app
    FKs/etc. resolve properly.
    Nc                 C   s>   |pi | _ |d u rtƒ }nt|tƒs(J ‚|| _d| _d | _d S ©NF)r   r.   r   Ú	real_appsÚ
is_delayedÚ
_relations)Úselfr   rE   r%   r%   r&   Ú__init__d   s    
zProjectState.__init__c                 C   s   | j d u r|  ¡  | j S ©N)rG   Úresolve_fields_and_relations©rH   r%   r%   r&   Ú	relationsp   s    
zProjectState.relationsc                 C   sB   |j |jf}|| j|< | jd ur*|  |¡ d| jv r>| j|Ž  d S ©Nr   )r"   Ú
name_lowerr   rG   Úresolve_model_relationsÚ__dict__Úreload_model)rH   Úmodel_stateÚ	model_keyr%   r%   r&   Ú	add_modelv   s    



zProjectState.add_modelc                 C   s|   ||f}| j |= | jd urX| j |d ¡ t| j ¡ ƒD ] \}}| |d ¡ |s6| j|= q6d| jv rx| jj|Ž  | j ¡  d S rN   )	r   rG   ÚpopÚlistÚitemsrQ   r   Úunregister_modelÚclear_cache)rH   r"   r#   rT   Zrelated_model_keyÚmodel_relationsr%   r%   r&   Úremove_model~   s    


zProjectState.remove_modelc                 C   sR  |  ¡ }|  ¡ }| j||f  ¡ }||_|| j||f< ||f}|› d|› �}tƒ }	t| |ƒD ]d\}
}}}d }|jr‚| ¡ }||j_|j	r |d u r˜| ¡ }||j_	|r\||
j
|< |	 |
j|
jf¡ q\| jd u�r$||f}||f}|| jv rú| j |¡| j|< | j ¡ D ]}||v �r| |¡||< �q| j|	dd� |  ||¡ | j||dd� d S )Nr   T©Údelay)Úlowerr   ÚcloneÚnamer.   r   ÚtoÚremote_fieldr$   ÚthroughÚfieldsr1   r"   rO   rG   rV   ÚvaluesÚreload_modelsr\   rR   )rH   r"   Úold_nameÚnew_nameÚold_name_lowerÚnew_name_lowerZrenamed_modelZold_model_tupleZnew_remote_modelZ	to_reloadrS   ra   ÚfieldÚ	referenceZchanged_fieldZold_name_keyZnew_name_keyr[   r%   r%   r&   Úrename_modelŽ   sB    ÿ


zProjectState.rename_modelc                 C   sV   | j ||f }i |j¥|¥|_|rB|D ]}||vr&|j |d¡ q&| j||dd� d S )NFTr]   )r   ÚoptionsrV   rR   )rH   r"   r#   ro   Zoption_keysrS   Úkeyr%   r%   r&   Úalter_model_optionsµ   s    z ProjectState.alter_model_optionsc                    sJ   | j ||f }|j |¡ }r6‡ fdd„|D ƒ|j|< | j||dd� d S )Nc                    s    g | ]}t |ƒt ˆ ƒkr|‘qS r%   )r    ©r*   Úobj©Úvalue_to_remover%   r&   r,   Á   s   z5ProjectState.remove_model_options.<locals>.<listcomp>Tr]   )r   ro   ÚgetrR   )rH   r"   r#   Úoption_nameru   rS   Úobjsr%   rt   r&   Úremove_model_options¾   s    
ÿz!ProjectState.remove_model_optionsc                 C   s,   | j ||f }t|ƒ|_| j||dd� d S ©NTr]   )r   rW   ÚmanagersrR   )rH   r"   r#   r{   rS   r%   r%   r&   Úalter_model_managersÆ   s    
z!ProjectState.alter_model_managersc                 C   s:   | j ||f }g |j| ¢|‘|j|< | j||dd� d S rz   ©r   ro   rR   )rH   r"   r#   rw   rs   rS   r%   r%   r&   Ú_append_optionË   s    zProjectState._append_optionc                    sD   | j ||f }|j| }‡ fdd„|D ƒ|j|< | j||dd� d S )Nc                    s   g | ]}|j ˆ kr|‘qS r%   ©ra   rr   ©Úobj_namer%   r&   r,   Ó   ó    z/ProjectState._remove_option.<locals>.<listcomp>Tr]   r}   )rH   r"   r#   rw   r�   rS   rx   r%   r€   r&   Ú_remove_optionÐ   s    
zProjectState._remove_optionc                 C   s   |   ||d|¡ d S ©NÚindexes©r~   )rH   r"   r#   Úindexr%   r%   r&   Ú	add_indexÖ   s    zProjectState.add_indexc                 C   s   |   ||d|¡ d S r„   ©rƒ   )rH   r"   r#   Z
index_namer%   r%   r&   Úremove_indexÙ   s    zProjectState.remove_indexc           	      C   sf   | j ||f }|jd }g }|D ]&}|j|kr<| ¡ }||_| |¡ q ||jd< | j||dd� d S )Nr…   Tr]   )r   ro   ra   r`   r2   rR   )	rH   r"   r#   Zold_index_nameZnew_index_namerS   rx   Znew_indexesrs   r%   r%   r&   Úrename_indexÜ   s    


zProjectState.rename_indexc                 C   s   |   ||d|¡ d S ©NÚconstraintsr†   )rH   r"   r#   Ú
constraintr%   r%   r&   Úadd_constraintê   s    zProjectState.add_constraintc                 C   s   |   ||d|¡ d S rŒ   r‰   )rH   r"   r#   Zconstraint_namer%   r%   r&   Úremove_constraintí   s    zProjectState.remove_constraintc                 C   sd   |s|  ¡ }t|_n|}||f}|| j| j|< | jd urH|  |||¡ |j }| j|d|iŽ d S ©Nr^   )	r`   r   Údefaultr   re   rG   Úresolve_model_field_relationsr/   rR   )rH   r"   r#   ra   rl   Úpreserve_defaultrT   r^   r%   r%   r&   Ú	add_fieldð   s    
zProjectState.add_fieldc                 C   sR   ||f}| j | }|j |¡}| jd ur6|  |||¡ |j }| j|d|iŽ d S r‘   )r   re   rV   rG   r“   r/   rR   )rH   r"   r#   ra   rT   rS   Ú	old_fieldr^   r%   r%   r&   Úremove_fieldÿ   s    

zProjectState.remove_fieldc           
      C   s¨   |s|  ¡ }t|_n|}||f}| j| j}| jd urr| |¡}|jrT|  |||¡ |||< |jrz|  |||¡ n|||< |j o’t	| |||fƒ }	| j
|d|	iŽ d S r‘   )r`   r   r’   r   re   rG   rV   r/   r“   r   rR   )
rH   r"   r#   ra   rl   r”   rT   re   r–   r^   r%   r%   r&   Úalter_field	  s$    



ÿzProjectState.alter_fieldc              
      s¨  ||f}| j | }|j}z| ˆ¡}W n, tyR   t|› d|› dˆ› d�ƒ‚Y n0 ||ˆ < | ¡ D ].}	t|	dd ƒ}
|
rdt‡ ‡fdd„|
D ƒƒ|	_qd|j	}dD ](}||v rž‡ ‡fdd„|| D ƒ||< qžd	}t
| |ˆ|fƒ}|D ]V�^ }}	}d
}|jrà|j\}}t|dd ƒˆk�rˆ |_|ràt‡ ‡fdd„|D ƒƒ|	_qà| jd u�r”ˆ ¡ }ˆ  ¡ }| j ¡ D ]4}||| v �r^||  |¡}	||	_|	|| |< �q^| j|d|iŽ d S )Nr   z has no field named 'ú'Úfrom_fieldsc                    s   g | ]}|ˆkrˆ n|‘qS r%   r%   )r*   Zfrom_field_name©ri   rh   r%   r&   r,   4  s   ÿz-ProjectState.rename_field.<locals>.<listcomp>)Úindex_togetherÚunique_togetherc                    s    g | ]}‡ ‡fd d„|D ƒ‘qS )c                    s   g | ]}|ˆkrˆ n|‘qS r%   r%   )r*   Únr›   r%   r&   r,   >  r‚   z8ProjectState.rename_field.<locals>.<listcomp>.<listcomp>r%   )r*   Ztogetherr›   r%   r&   r,   =  s   ÿTFÚ
field_namec                    s   g | ]}|ˆkrˆ n|‘qS r%   r%   )r*   Zto_field_namer›   r%   r&   r,   L  s   ÿr^   )r   re   rV   ÚKeyErrorr
   rf   Úgetattrr    rš   ro   r   rb   rŸ   Ú	to_fieldsrG   r_   ra   rR   )rH   r"   r#   rh   ri   rT   rS   re   Úfoundrl   rš   ro   Úoptionr^   Z
referencesÚ_rm   rc   r¢   rj   rk   Zto_modelr%   r›   r&   Úrename_field#  s^    
ÿ
þÿþ
þÿzProjectState.rename_fieldFc              	   C   s  |r
d| _ tƒ }z| j ||¡}W n ty4   Y n0 |rDt|ƒ}nt|ƒ}| j||f }tƒ }|j 	¡ D ]:}|j
rj|jjtkr‚qjt|j|ƒ\}	}
| |	|
 ¡ f¡ qj| |¡ |D ]P\}	}
z| j |	|
¡}W n tyà   Y q´0 |rö| t|ƒ¡ q´| t|ƒ¡ q´| ||f¡ |S )NT)rF   r.   r   Ú	get_modelÚLookupErrorr<   rB   r   re   rf   r/   rc   r$   r   r'   r0   r1   r_   Úupdate)rH   r"   r#   r^   r5   Z	old_modelrS   Zdirect_related_modelsrl   r@   rA   Z	rel_modelr%   r%   r&   Ú_find_reload_model[  s>    
ÿ
zProjectState._find_reload_modelc                 C   s&   d| j v r"|  |||¡}|  |¡ d S rN   )rQ   rª   Ú_reload)rH   r"   r#   r^   r5   r%   r%   r&   rR   �  s    
zProjectState.reload_modelTc                 C   s@   d| j v r<tƒ }|D ]\}}| |  |||¡¡ q|  |¡ d S rN   )rQ   r.   r©   rª   r«   )rH   r   r^   r5   r"   r#   r%   r%   r&   rg   ’  s    
ÿzProjectState.reload_modelsc              	   C   sÀ   | j  ¡ �, |D ]\}}| j  ||¡ qW d   ƒ n1 s<0    Y  g }| j jD ]}|j|jf|v rR| |¡ qR|D ]8\}}z| j||f }W n ty¢   Y qv0 | |¡ qv| j  	|¡ d S rJ   )
r   Úbulk_updaterY   Úreal_modelsr"   rO   r2   r   r    Úrender_multiple)rH   r5   r@   rA   Zstates_to_be_renderedrS   r%   r%   r&   r«   ›  s    .zProjectState._reloadc                 C   s‚   t |g|¢R Ž }|d | jvr.||v r.|| }| j| }|| j| jv rf||| vsXJ ‚||| |< n|| |= || s~||= d S )Nr   )r   rE   rG   r   re   )rH   r$   rT   rŸ   rl   Ú	concretesZremote_model_keyZrelations_to_remote_modelr%   r%   r&   Úupdate_model_field_relationµ  s    

z(ProjectState.update_model_field_relationc                 C   s`   |j }|sd S |d u r"|  ¡ \}}|  |j||||¡ t|dd ƒ}|sJd S |  |||||¡ d S )Nrd   )rc   Ú-_get_concrete_models_mapping_and_proxy_modelsr°   r$   r¡   )rH   rT   rŸ   rl   r¯   rc   r¥   rd   r%   r%   r&   r“   Ì  s$    û
ÿz*ProjectState.resolve_model_field_relationsc                 C   sF   |d u r|   ¡ \}}| j| }|j ¡ D ]\}}|  ||||¡ q(d S rJ   )r±   r   re   rX   r“   )rH   rT   r¯   r¥   rS   rŸ   rl   r%   r%   r&   rP   è  s
    
z$ProjectState.resolve_model_relationsc                 C   s~   | j  ¡ D ]}|j ¡ D ]\}}||_qq
ttttƒƒ| _|  	¡ \}}|D ]}|  
||¡ qJ|D ]}| j||  | j|< q`d S rJ   )r   rf   re   rX   ra   r   r   ÚdictrG   r±   rP   )rH   rS   rŸ   rl   r¯   ÚproxiesrT   r%   r%   r&   rK   ð  s    
z)ProjectState.resolve_fields_and_relationsc                 C   s   |   ¡ \}}t|ƒ}|| S rJ   )r±   r   )rH   r$   Úconcrete_models_mappingr¥   rT   r%   r%   r&   Úget_concrete_model_key   s    ýz#ProjectState.get_concrete_model_keyc                 C   sR   i }i }| j  ¡ D ]6\}}|j d¡r@|||< |  ||¡||< q|||< q||fS )Nr3   )r   rX   ro   rv   Ú_find_concrete_model_from_proxy)rH   r´   Úproxy_modelsrT   rS   r%   r%   r&   r±     s    þþÿ
z:ProjectState._get_concrete_models_mapping_and_proxy_modelsc                 C   sT   |j D ]H}t|tƒs"t|tjƒs"qt|ƒ}| |¡}|s@|  S |  ||¡  S d S rJ   )	Úbasesr   r   r(   r   r)   r   rv   r¶   )rH   r·   rS   ÚbaseZbase_keyZ
base_stater%   r%   r&   r¶     s    

z,ProjectState._find_concrete_model_from_proxyc                 C   s@   t dd„ | j ¡ D ƒ| jd�}d| jv r4| j ¡ |_| j|_|S )z*Return an exact copy of this ProjectState.c                 S   s   i | ]\}}||  ¡ “qS r%   ©r`   )r*   ÚkÚvr%   r%   r&   Ú
<dictcomp>(  r‚   z&ProjectState.clone.<locals>.<dictcomp>©r   rE   r   )rC   r   rX   rE   rQ   r   r`   rF   )rH   Ú	new_stater%   r%   r&   r`   %  s    þ
zProjectState.clonec                 C   s   | j rd| jv r| jd= d S rN   )rF   rQ   rL   r%   r%   r&   Úclear_delayed_apps_cache0  s    z%ProjectState.clear_delayed_apps_cachec                 C   s   t | j| jƒS rJ   )Ú	StateAppsrE   r   rL   r%   r%   r&   r   4  s    zProjectState.appsc                 C   s8   i }|j dd�D ]}t |¡}|||j|jf< q| |ƒS )z3Take an Apps and return a ProjectState matching it.T)Zinclude_swapped)Ú
get_modelsÚ
ModelStateÚ
from_modelr"   rO   )Úclsr   Z
app_modelsr$   rS   r%   r%   r&   Ú	from_apps8  s
    
zProjectState.from_appsc                 C   s   | j |j ko| j|jkS rJ   r¾   ©rH   Úotherr%   r%   r&   Ú__eq__A  s    zProjectState.__eq__)NN)N)F)F)T)N)N)*Ú__name__Ú
__module__Ú__qualname__Ú__doc__rI   ÚpropertyrM   rU   r\   rn   rq   ry   r|   r~   rƒ   rˆ   rŠ   r‹   r�   r�   r•   r—   r˜   r¦   rª   rR   rg   r«   r°   r“   rP   rK   rµ   r±   r¶   r`   rÀ   r   r   ÚclassmethodrÆ   rÉ   r%   r%   r%   r&   rC   ]   sP   

'
	
8
2

	 û



rC   c                   @   s    e Zd ZdZdd„ Zdd„ ZdS )ÚAppConfigStubzAStub of an AppConfig. Only provides a label and a dict of models.c                 C   s   d | _ i | _|| _|| _d S rJ   )r   r   Úlabelra   )rH   rÑ   r%   r%   r&   rI   H  s    zAppConfigStub.__init__c                 C   s   | j j| j | _d S rJ   )r   Ú
all_modelsrÑ   r   rL   r%   r%   r&   Úimport_modelsQ  s    zAppConfigStub.import_modelsN)rÊ   rË   rÌ   rÍ   rI   rÓ   r%   r%   r%   r&   rÐ   E  s   	rÐ   c                       sN   e Zd ZdZd‡ fdd„	Zedd„ ƒZdd„ Zd	d
„ Zdd„ Z	dd„ Z
‡  ZS )rÁ   zo
    Subclass of the global Apps registry class to better handle dynamic model
    additions and removals.
    Fc                    sè   g | _ |D ]2}t |¡}| ¡ D ]}| j  tj|dd�¡ q q
dd„ | ¡ D ƒ}dd„ tg |¢|¢ƒD ƒ}t	ƒ  
|¡ d | _d | _|  g | ¡ ¢| j ¢¡ ddlm}	 |r¶ttjƒhntƒ }
|	| |
d	�}|rätd
 dd„ |D ƒ¡ƒ‚d S )NT)Úexclude_relsc                 S   s   h | ]
}|j ’qS r%   )r"   )r*   rS   r%   r%   r&   r:   g  r‚   z%StateApps.__init__.<locals>.<setcomp>c                 S   s   g | ]}t |ƒ‘qS r%   )rÐ   )r*   rÑ   r%   r%   r&   r,   h  s   z&StateApps.__init__.<locals>.<listcomp>r   )Ú_check_lazy_references)ÚignoreÚ
c                 s   s   | ]}|j V  qd S rJ   )Úmsg)r*   Úerrorr%   r%   r&   Ú	<genexpr>}  r‚   z%StateApps.__init__.<locals>.<genexpr>)r­   Úglobal_appsZget_app_configrÂ   r2   rÃ   rÄ   rf   ÚsortedÚsuperrI   Ú_lockZready_eventr®   Zdjango.core.checks.model_checksrÕ   r   r	   ZAUTH_USER_MODELr.   Ú
ValueErrorÚjoin)rH   rE   r   Zignore_swappabler"   Zappr$   Z
app_labelsÚapp_configsrÕ   rÖ   Úerrors©Ú	__class__r%   r&   rI   [  s&    
ÿÿzStateApps.__init__c                 c   s:   | j }d| _ zd V  W || _ |  ¡  n|| _ |  ¡  0 d S rD   )ÚreadyrZ   )rH   rå   r%   r%   r&   r¬     s    
ÿzStateApps.bulk_updatec              
   C   sž   |sd S |   ¡ �z |}|r|g }|D ]0}z| | ¡ W q" tyP   | |¡ Y q"0 q"t|ƒt|ƒkrvtd|tƒ f ƒ‚|}qW d   ƒ n1 s�0    Y  d S )NzéCannot resolve bases for %r
This can happen if you are inheriting models from an app with migrations (e.g. contrib.auth)
 in an app with no migrations; see https://docs.djangoproject.com/en/%s/topics/migrations/#dependencies for more)r¬   Úrenderr   r2   r   r   )rH   Zmodel_statesZunrendered_modelsZnew_unrendered_modelsr$   r%   r%   r&   r®   ‹  s$    
ûÿzStateApps.render_multiplec                 C   sP   t g i ƒ}t | j¡|_| jD ]$}t|ƒ}||_| ¡  ||j|< q| j|_|S )z Return a clone of this registry.)	rÁ   ÚcopyÚdeepcopyrÒ   rá   rÐ   r   rÓ   r­   )rH   r`   r"   Z
app_configr%   r%   r&   r`   §  s    

zStateApps.clonec                 C   s`   || j | |jj< || jvr6t|ƒ| j|< | | j| _|| j| j|jj< |  |¡ |  ¡  d S rJ   )	rÒ   r!   r#   rá   rÐ   r   r   Zdo_pending_operationsrZ   )rH   r"   r$   r%   r%   r&   Úregister_model¶  s    

zStateApps.register_modelc                 C   s6   z| j | |= | j| j|= W n ty0   Y n0 d S rJ   )rÒ   rá   r   r    )rH   r"   r#   r%   r%   r&   rY   ¿  s
    zStateApps.unregister_model)F)rÊ   rË   rÌ   rÍ   rI   r   r¬   r®   r`   ré   rY   Ú__classcell__r%   r%   rã   r&   rÁ   U  s   $
	rÁ   c                   @   st   e Zd ZdZddd„Zedd„ ƒZdd„ Zedd
d„ƒZ	dd„ Z
dd„ Zdd„ Zdd„ Zdd„ Zdd„ Zdd„ ZdS )rÃ   a�  
    Represent a Django Model. Don't use the actual Model class as it's not
    designed to have its options changed - instead, mutate this one and then
    render it into a Model as required.

    Note that while you are allowed to mutate .fields, you are not allowed
    to mutate the Field instances inside there themselves - you must instead
    assign new ones, as these are not detached during a clone.
    Nc           	      C   sâ   || _ || _t|ƒ| _|pi | _| j dg ¡ | j dg ¡ |pFtjf| _|pPg | _	| j 
¡ D ]\\}}t|dƒr|td| ƒ‚|jršt|jdƒrštd| ƒ‚|jr^t|jjdƒr^td| ƒ‚q^| jd D ]}|jsÆtd| ƒ‚qÆd S )	Nr…   r�   r$   z7ModelState.fields cannot be bound to a model - "%s" is.r!   z_ModelState.fields cannot refer to a model class - "%s.to" does. Use a string reference instead.zdModelState.fields cannot refer to a model class - "%s.through" does. Use a string reference instead.zKIndexes passed to ModelState require a name attribute. %r doesn't have one.)r"   ra   r²   re   ro   Ú
setdefaultr   r)   r¸   r{   rX   Úhasattrrß   r/   r0   Zmany_to_manyrc   rd   )	rH   r"   ra   re   ro   r¸   r{   rl   r‡   r%   r%   r&   rI   Ò  s@    



ÿÿÿÿÿÿÿzModelState.__init__c                 C   s
   | j  ¡ S rJ   )ra   r_   rL   r%   r%   r&   rO   ö  s    zModelState.name_lowerc                 C   s    |dkr| j  d|¡}| j| S )NÚ_orderÚorder_with_respect_to)ro   rv   re   )rH   rŸ   r%   r%   r&   Ú	get_fieldú  s    zModelState.get_fieldFc                    s\  g }ˆj jD ]|}t|ddƒr"|r"qt|tjƒr0q|j}z| || ¡ f¡ W q t	y† } z"t	d|ˆj j
|f ƒ‚W Y d}~qd}~0 0 q|sôˆj jD ]\}|j}z| || ¡ f¡ W q– t	yð } z"t	d|ˆj j|f ƒ‚W Y d}~q–d}~0 0 q–i }tD ]ä}|dv �rqüqü|ˆj jv rü|dk�rBˆj jd }tt|ƒƒ||< qü|dk�rjˆj jd }	tt|	ƒƒ||< qü|dk�r®d	d
„ ˆj jD ƒ}
|
D ]}|j�sŠ| ˆ¡ �qŠ|
|d< qü|dk�rÐdd
„ ˆj jD ƒ|d< qüˆj j| ||< qü|�rdD ]}||v �rì||= �qìn$| d¡dd„ ˆj jD ƒv �r*|d= ‡ fdd„‰ ttˆ ˆƒƒ‡fdd„d�}tdd„ |D ƒƒ}tdd„ |D ƒƒ�s€tjf}g }tƒ }d}ˆj jD ]–}|j|v �r¬�q–nb|j�rÈt |¡}| ¡  nF|ˆju �sà|ˆju �r–t  ¡ }|j!|_!|j|_|ˆju �r|}n�q–| "|j¡ | |j|f¡ �q–|d|fgk�rBg }| ˆj j#ˆj j||||ƒS )z3Given a model, return a ModelState representing it.rc   Nz'Couldn't reconstruct field %s on %s: %sz+Couldn't reconstruct m2m field %s on %s: %s)r   r"   r�   rœ   r…   c                 S   s   g | ]}|  ¡ ‘qS r%   rº   )r*   Úidxr%   r%   r&   r,   1  r‚   z)ModelState.from_model.<locals>.<listcomp>r�   c                 S   s   g | ]}|  ¡ ‘qS r%   rº   )r*   Úconr%   r%   r&   r,   7  s   )r�   rœ   rî   rî   c                 S   s   h | ]
}|j ’qS r%   r   )r*   rl   r%   r%   r&   r:   C  s   z(ModelState.from_model.<locals>.<setcomp>c                    s@   g }| j D ]0}t|dƒr0|jjr0| ˆ |ƒ¡ q
| |¡ q
|S )Nr!   )Ú	__bases__rì   r!   Zabstractr=   r2   )r$   r¸   r¹   )Úflatten_basesr%   r&   ró   H  s    
z,ModelState.from_model.<locals>.flatten_basesc                    s   ˆ j  | ¡S rJ   )Ú__mro__r‡   )Úxr;   r%   r&   Ú<lambda>W  r‚   z'ModelState.from_model.<locals>.<lambda>©rp   c                 s   s$   | ]}t |d ƒr|jjn|V  qdS )r!   N)rì   r!   Zlabel_lower©r*   r¹   r%   r%   r&   rÚ   [  s   ÿz(ModelState.from_model.<locals>.<genexpr>c                 s   s$   | ]}t |tƒpt|tjƒV  qd S rJ   )r   r   r(   r   r)   rø   r%   r%   r&   rÚ   `  s   Úobjects)$r!   Zlocal_fieldsr¡   r   r   ZOrderWrtra   r2   r`   Ú	TypeErrorrÑ   Zlocal_many_to_manyZobject_namer   Zoriginal_attrsr.   r   r…   Zset_name_with_modelr�   rv   Zprivate_fieldsrÜ   r    Úanyr)   r{   Zuse_in_migrationsrç   Z_set_creation_counterZ_base_managerZ_default_managerÚManagerr$   r1   r"   )rÅ   r$   rÔ   re   rl   ra   Úero   ÚutÚitr…   r‡   rp   Zflattened_basesr¸   r{   Zmanager_namesZdefault_manager_shimÚmanagerZnew_managerr%   )ró   r$   r&   rÄ   ÿ  sÊ    ýÿÿýÿÿ	





ÿ
ÿ
ÿþÿ


úzModelState.from_modelc                 c   sn   t | jdd„ d�}|D ]R\}}| ¡ \}}}}}|rLt|ƒ}	||	 ¡ fV  qt|ƒ}
||
|i |¤ŽfV  qdS )z-Deep-clone the managers using deconstruction.c                 S   s
   | d j S )Nr   )Zcreation_counter)r¼   r%   r%   r&   rö   �  r‚   z/ModelState.construct_managers.<locals>.<lambda>r÷   N)rÜ   r{   Údeconstructr   Ú
as_manager)rH   Zsorted_managersZmgr_namer   r  Zmanager_pathZqs_pathÚargsÚkwargsZqs_classZmanager_classr%   r%   r&   Úconstruct_managersŠ  s    zModelState.construct_managersc                 C   s.   | j | j| jt| jƒt| jƒ| jt| jƒd�S )z(Return an exact copy of this ModelState.)r"   ra   re   ro   r¸   r{   )	rä   r"   ra   r²   re   ro   r¸   rW   r{   rL   r%   r%   r&   r`   —  s    ÷zModelState.clonec                    sž   | j ˆ dœ| j¥}tdd|ƒ}zt‡ fdd„| jD ƒƒ}W n" ty\   td| jf ƒ‚Y n0 dd„ | j ¡ D ƒ}||d< d	|d
< | 	|  
¡ ¡ t| j||ƒS )zACreate a Model object from our current state into the given apps.)r"   r   ZMetar%   c                 3   s&   | ]}t |tƒrˆ  |¡n|V  qd S rJ   )r   r   r§   rø   r   r%   r&   rÚ   ¬  s   ÿz$ModelState.render.<locals>.<genexpr>z(Cannot resolve one or more bases from %rc                 S   s   i | ]\}}||  ¡ “qS r%   rº   )r*   ra   rl   r%   r%   r&   r½   µ  r‚   z%ModelState.render.<locals>.<dictcomp>Z__fake__rË   )r"   ro   Útyper    r¸   r¨   r   re   rX   r©   r  ra   )rH   r   Zmeta_contentsÚmetar¸   Úbodyr%   r   r&   ræ   ¥  s    þ
ÿ
zModelState.renderc                 C   s8   | j d D ]}|j|kr
|  S q
td|| jf ƒ‚d S )Nr…   zNo index named %s on model %s©ro   ra   rß   )rH   ra   r‡   r%   r%   r&   Úget_index_by_name¾  s    

zModelState.get_index_by_namec                 C   s8   | j d D ]}|j|kr
|  S q
td|| jf ƒ‚d S )Nr�   z"No constraint named %s on model %sr	  )rH   ra   rŽ   r%   r%   r&   Úget_constraint_by_nameÄ  s    

z!ModelState.get_constraint_by_namec                 C   s   d| j j| j| jf S )Nz<%s: '%s.%s'>)rä   rÊ   r"   ra   rL   r%   r%   r&   Ú__repr__Ê  s    zModelState.__repr__c                 C   s|   | j |j koz| j|jkozt| jƒt|jƒkoztdd„ tt| j ¡ ƒt|j ¡ ƒƒD ƒƒoz| j|jkoz| j	|j	koz| j
|j
kS )Nc                 s   sB   | ]:\\}}\}}||ko8|  ¡ d d… |  ¡ d d… kV  qdS )r   N)r  )r*   Zk1Úf1Zk2Úf2r%   r%   r&   rÚ   Ò  s   ÿz$ModelState.__eq__.<locals>.<genexpr>)r"   ra   r   re   ÚallÚziprÜ   rX   ro   r¸   r{   rÇ   r%   r%   r&   rÉ   Í  s$    
ÿþþþý

ö
õ
ózModelState.__eq__)NNN)F)rÊ   rË   rÌ   rÍ   rI   r   rO   rï   rÏ   rÄ   r  r`   ræ   r
  r  r  rÉ   r%   r%   r%   r&   rÃ   Ç  s     ÿ
$
 rÃ   )r   )1rç   Úcollectionsr   Ú
contextlibr   Ú	functoolsr   Zdjango.appsr   Zdjango.apps.registryr   r   rÛ   Zdjango.confr	   Zdjango.core.exceptionsr
   Z	django.dbr   Zdjango.db.migrations.utilsr   r   Zdjango.db.modelsr   Zdjango.db.models.fields.relatedr   Zdjango.db.models.optionsr   r   Zdjango.db.models.utilsr   Zdjango.utils.functionalr   Zdjango.utils.module_loadingr   Zdjango.utils.versionr   Ú
exceptionsr   Úutilsr   r'   r8   r<   rB   rC   rÐ   rÁ   rÃ   r%   r%   r%   r&   Ú<module>   s<   
   kr