U
    R+|jÎž  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%   úbc:\users\snmko\desktop\web_content\django_cbt\venv\Lib\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k	r(t|jtƒs(| |j	¡ | 
|j¡ q(| j}|jr‚| |k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|k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$e%dEdF„ ƒZ&e'dGdH„ ƒZ(dIdJ„ Z)dS )RÚProjectStatez½
    Represent the entire project's overall state. This is the item that is
    passed around - do it here rather than at the app level so that cross-app
    FKs/etc. resolve properly.
    Nc                 C   s>   |pi | _ |d krtƒ }nt|tƒs(t‚|| _d| _d | _d S ©NF)r   r.   r   ÚAssertionErrorÚ	real_appsÚ
is_delayedÚ
_relations)Úselfr   rF   r%   r%   r&   Ú__init__d   s    
zProjectState.__init__c                 C   s   | j d kr|  ¡  | j S ©N)rH   Úresolve_fields_and_relations©rI   r%   r%   r&   Ú	relationsp   s    
zProjectState.relationsc                 C   sB   |j |jf}|| j|< | jd k	r*|  |¡ d| jkr>| j|Ž  d S ©Nr   )r"   Ú
name_lowerr   rH   Úresolve_model_relationsÚ__dict__Úreload_model)rI   Úmodel_stateÚ	model_keyr%   r%   r&   Ú	add_modelv   s    



zProjectState.add_modelc                 C   s|   ||f}| j |= | jd k	rX| j |d ¡ t| j ¡ ƒD ] \}}| |d ¡ |s6| j|= q6d| jkrx| jj|Ž  | j ¡  d S rO   )	r   rH   ÚpopÚlistÚitemsrR   r   Úunregister_modelÚclear_cache)rI   r"   r#   rU   Zrelated_model_keyÚmodel_relationsr%   r%   r&   Úremove_model~   s    


zProjectState.remove_modelc                 C   sR  |  ¡ }|  ¡ }| j||f  ¡ }||_|| j||f< ||f}|› d|› �}tƒ }	t| |ƒD ]d\}
}}}d }|jr‚| ¡ }||j_|j	r |d kr˜| ¡ }||j_	|r\||
j
|< |	 |
j|
jf¡ q\| jd k	�r$||f}||f}|| jkrú| j |¡| j|< | j ¡ D ]}||k�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"   rP   rH   rW   ÚvaluesÚreload_modelsr]   rS   )rI   r"   Úold_nameÚnew_nameÚold_name_lowerÚnew_name_lowerZrenamed_modelZold_model_tupleZnew_remote_modelZ	to_reloadrT   rb   ÚfieldÚ	referenceZchanged_fieldZold_name_keyZnew_name_keyr\   r%   r%   r&   Úrename_modelŽ   sD     ÿ


zProjectState.rename_modelc                 C   sR   | j ||f }|j|–|_|r>|D ]}||kr"|j |d¡ q"| j||dd� d S )NFTr^   )r   ÚoptionsrW   rS   )rI   r"   r#   rp   Zoption_keysrT   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   rp   ÚgetrS   )rI   r"   r#   Úoption_namerv   rT   Úobjsr%   ru   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   rX   ÚmanagersrS   )rI   r"   r#   r|   rT   r%   r%   r&   Úalter_model_managersÆ   s    
z!ProjectState.alter_model_managersc                 C   s8   | j ||f }|j| |f•|j|< | j||dd� d S r{   ©r   rp   rS   )rI   r"   r#   rx   rt   rT   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%   ©rb   rs   ©Úobj_namer%   r&   r,   Ó   s     
 z/ProjectState._remove_option.<locals>.<listcomp>Tr^   r~   )rI   r"   r#   rx   r‚   rT   ry   r%   r�   r&   Ú_remove_optionÐ   s    
zProjectState._remove_optionc                 C   s   |   ||d|¡ d S ©NÚindexes©r   )rI   r"   r#   Úindexr%   r%   r&   Ú	add_indexÖ   s    zProjectState.add_indexc                 C   s   |   ||d|¡ d S r„   ©rƒ   )rI   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   rp   rb   ra   r2   rS   )	rI   r"   r#   Zold_index_nameZnew_index_namerT   ry   Znew_indexesrt   r%   r%   r&   Úrename_indexÜ   s    


zProjectState.rename_indexc                 C   s   |   ||d|¡ d S ©NÚconstraintsr†   )rI   r"   r#   Ú
constraintr%   r%   r&   Úadd_constraintê   s    zProjectState.add_constraintc                 C   s   |   ||d|¡ d S rŒ   r‰   )rI   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 k	rH|  |||¡ |j }| j|d|iŽ d S ©Nr_   )	ra   r   Údefaultr   rf   rH   Úresolve_model_field_relationsr/   rS   )rI   r"   r#   rb   rm   Úpreserve_defaultrU   r_   r%   r%   r&   Ú	add_fieldð   s    
zProjectState.add_fieldc                 C   sR   ||f}| j | }|j |¡}| jd k	r6|  |||¡ |j }| j|d|iŽ d S r‘   )r   rf   rW   rH   r“   r/   rS   )rI   r"   r#   rb   rU   rT   Ú	old_fieldr_   r%   r%   r&   Úremove_fieldÿ   s    

zProjectState.remove_fieldc           
      C   s¨   |s|  ¡ }t|_n|}||f}| j| j}| jd k	rr| |¡}|jrT|  |||¡ |||< |jrz|  |||¡ n|||< |j o’t	| |||fƒ }	| j
|d|	iŽ d S r‘   )ra   r   r’   r   rf   rH   rW   r/   r“   r   rS   )
rI   r"   r#   rb   rm   r”   rU   rf   r–   r_   r%   r%   r&   Úalter_field	  s(    


  ÿzProjectState.alter_fieldc              
      sª  ||f}| j | }|j}z| ˆ¡}W n. tk
rT   t|› d|› dˆ› d�ƒ‚Y nX ||ˆ < | ¡ D ].}	t|	dd ƒ}
|
rft‡ ‡fdd„|
D ƒƒ|	_qf|j	}dD ](}||kr ‡ ‡fdd„|| D ƒ||< q d	}t
| |ˆ|fƒ}|D ]V�^ }}	}d
}|jrâ|j\}}t|dd ƒˆk�rˆ |_|rât‡ ‡fdd„|D ƒƒ|	_qâ| jd k	�r–ˆ ¡ }ˆ  ¡ }| j ¡ D ]4}||| k�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©rj   ri   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,   >  s     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   rf   rW   ÚKeyErrorr
   rg   Úgetattrr    rš   rp   r   rc   rŸ   Ú	to_fieldsrH   r`   rb   rS   )rI   r"   r#   ri   rj   rU   rT   rf   Úfoundrm   rš   rp   Úoptionr_   Z
referencesÚ_rn   rd   r¢   rk   rl   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k
r6   Y nX |rFt|ƒ}nt|ƒ}| j||f }tƒ }|j 	¡ D ]:}|j
rl|jjtkr„qlt|j|ƒ\}	}
| |	|
 ¡ f¡ ql| |¡ |D ]R\}	}
z| j |	|
¡}W n tk
rä   Y q¶X |rú| t|ƒ¡ q¶| t|ƒ¡ q¶| ||f¡ |S )NT)rG   r.   r   Ú	get_modelÚLookupErrorr<   rB   r   rf   rg   r/   rd   r$   r   r'   r0   r1   r`   Úupdate)rI   r"   r#   r_   r5   Z	old_modelrT   Zdirect_related_modelsrm   r@   rA   Z	rel_modelr%   r%   r&   Ú_find_reload_model[  s@    
 ÿ
zProjectState._find_reload_modelc                 C   s&   d| j kr"|  |||¡}|  |¡ d S rO   )rR   rª   Ú_reload)rI   r"   r#   r_   r5   r%   r%   r&   rS   �  s    
zProjectState.reload_modelTc                 C   s@   d| j kr<tƒ }|D ]\}}| |  |||¡¡ q|  |¡ d S rO   )rR   r.   r©   rª   r«   )rI   r   r_   r5   r"   r#   r%   r%   r&   rh   ’  s    
ÿzProjectState.reload_modelsc              	   C   s®   | j  ¡ �" |D ]\}}| j  ||¡ qW 5 Q R X g }| j jD ]}|j|jf|kr>| |¡ q>|D ]:\}}z| j||f }W n tk
r�   Y qbX | |¡ qb| j  	|¡ d S rK   )
r   Úbulk_updaterZ   Úreal_modelsr"   rP   r2   r   r    Úrender_multiple)rI   r5   r@   rA   Zstates_to_be_renderedrT   r%   r%   r&   r«   ›  s    zProjectState._reloadc                 C   s€   t |f|žŽ }|d | jkr,||kr,|| }| j| }|| j| jkrd||| ksVt‚||| |< n|| |= || s|||= d S )Nr   )r   rF   rH   r   rf   rE   )rI   r$   rU   rŸ   rm   Ú	concretesZremote_model_keyZrelations_to_remote_modelr%   r%   r&   Úupdate_model_field_relationµ  s    

z(ProjectState.update_model_field_relationc                 C   s`   |j }|sd S |d kr"|  ¡ \}}|  |j||||¡ t|dd ƒ}|sJd S |  |||||¡ d S )Nre   )rd   Ú-_get_concrete_models_mapping_and_proxy_modelsr°   r$   r¡   )rI   rU   rŸ   rm   r¯   rd   r¥   re   r%   r%   r&   r“   Ì  s,    û    ÿz*ProjectState.resolve_model_field_relationsc                 C   sF   |d kr|   ¡ \}}| j| }|j ¡ D ]\}}|  ||||¡ q(d S rK   )r±   r   rf   rY   r“   )rI   rU   r¯   r¥   rT   rŸ   rm   r%   r%   r&   rQ   è  s
    
z$ProjectState.resolve_model_relationsc                 C   s~   | j  ¡ D ]}|j ¡ D ]\}}||_qq
ttttƒƒ| _|  	¡ \}}|D ]}|  
||¡ qJ|D ]}| j||  | j|< q`d S rK   )r   rg   rf   rY   rb   r   r   ÚdictrH   r±   rQ   )rI   rT   rŸ   rm   r¯   ÚproxiesrU   r%   r%   r&   rL   ð  s    
z)ProjectState.resolve_fields_and_relationsc                 C   s   |   ¡ \}}t|ƒ}|| S rK   )r±   r   )rI   r$   Úconcrete_models_mappingr¥   rU   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   rY   rp   rw   Ú_find_concrete_model_from_proxy)rI   r´   Úproxy_modelsrU   rT   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 rK   )	Úbasesr   r   r(   r   r)   r   rw   r¶   )rI   r·   rT   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kr4| j ¡ |_| j|_|S )z*Return an exact copy of this ProjectState.c                 S   s   i | ]\}}||  ¡ “qS r%   ©ra   )r*   ÚkÚvr%   r%   r&   Ú
<dictcomp>(  s      z&ProjectState.clone.<locals>.<dictcomp>©r   rF   r   )rC   r   rY   rF   rR   r   ra   rG   )rI   Z	new_stater%   r%   r&   ra   %  s    þ
zProjectState.clonec                 C   s   | j rd| jkr| jd= d S rO   )rG   rR   rM   r%   r%   r&   Úclear_delayed_apps_cache0  s    z%ProjectState.clear_delayed_apps_cachec                 C   s   t | j| jƒS rK   )Ú	StateAppsrF   r   rM   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"   rP   )Úclsr   Z
app_modelsr$   rT   r%   r%   r&   Ú	from_apps8  s
    
zProjectState.from_appsc                 C   s   | j |j ko| j|jkS rK   r¾   ©rI   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__rJ   ÚpropertyrN   rV   r]   ro   rr   rz   r}   r   rƒ   rˆ   rŠ   r‹   r�   r�   r•   r—   r˜   r¦   rª   rS   rh   r«   r°   r“   rQ   rL   rµ   r±   r¶   ra   r¿   r   r   ÚclassmethodrÅ   rÈ   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 rK   )r   r   Úlabelrb   )rI   rÐ   r%   r%   r&   rJ   H  s    zAppConfigStub.__init__c                 C   s   | j j| j | _d S rK   )r   Ú
all_modelsrÐ   r   rM   r%   r%   r&   Úimport_modelsQ  s    zAppConfigStub.import_modelsN)rÉ   rÊ   rË   rÌ   rJ   rÒ   r%   r%   r%   r&   rÏ   E  s   	rÏ   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 )rÀ   zo
    Subclass of the global Apps registry class to better handle dynamic model
    additions and removals.
    Fc                    sà   g | _ |D ]2}t |¡}| ¡ D ]}| j  tj|dd�¡ q q
dd„ | ¡ D ƒ}dd„ t||•ƒD ƒ}t	ƒ  
|¡ d | _d | _|  | ¡ | j •¡ ddlm}	 |r®ttjƒhntƒ }
|	| |
d	�}|rÜtd
 dd„ |D ƒ¡ƒ‚d S )NT)Úexclude_relsc                 S   s   h | ]
}|j ’qS r%   )r"   )r*   rT   r%   r%   r&   r:   g  s     z%StateApps.__init__.<locals>.<setcomp>c                 S   s   g | ]}t |ƒ‘qS r%   )rÏ   )r*   rÐ   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 rK   )Úmsg)r*   Úerrorr%   r%   r&   Ú	<genexpr>}  s     z%StateApps.__init__.<locals>.<genexpr>)r­   Úglobal_appsZget_app_configrÁ   r2   rÂ   rÃ   rg   ÚsortedÚsuperrJ   Ú_lockZready_eventr®   Zdjango.core.checks.model_checksrÔ   r   r	   ZAUTH_USER_MODELr.   Ú
ValueErrorÚjoin)rI   rF   r   Zignore_swappabler"   Zappr$   Z
app_labelsÚapp_configsrÔ   rÕ   Úerrors©Ú	__class__r%   r&   rJ   [  s&    

ÿÿzStateApps.__init__c                 c   s,   | j }d| _ z
d V  W 5 || _ |  ¡  X d S rD   )Úreadyr[   )rI   rä   r%   r%   r&   r¬     s    
zStateApps.bulk_updatec              
   C   sŒ   |sd S |   ¡ �r |}|r~g }|D ]2}z| | ¡ W q" tk
rR   | |¡ Y q"X q"t|ƒt|ƒkrxtd|tƒ f ƒ‚|}qW 5 Q R X d S )NzéCannot resolve bases for %r
This can happen if you are inheriting models from an app with migrations (e.g. contrib.auth)
 in an app with no migrations; see https://docs.djangoproject.com/en/%s/topics/migrations/#dependencies for more)r¬   Úrenderr   r2   r   r   )rI   Zmodel_statesZunrendered_modelsZnew_unrendered_modelsr$   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.)	rÀ   ÚcopyÚdeepcopyrÑ   rà   rÏ   r   rÒ   r­   )rI   ra   r"   Z
app_configr%   r%   r&   ra   §  s    

zStateApps.clonec                 C   s`   || j | |jj< || jkr6t|ƒ| j|< | | j| _|| j| j|jj< |  |¡ |  ¡  d S rK   )	rÑ   r!   r#   rà   rÏ   r   r   Zdo_pending_operationsr[   )rI   r"   r$   r%   r%   r&   Úregister_model¶  s    

zStateApps.register_modelc                 C   s8   z| j | |= | j| j|= W n tk
r2   Y nX d S rK   )rÑ   rà   r   r    )rI   r"   r#   r%   r%   r&   rZ   ¿  s
    zStateApps.unregister_model)F)rÉ   rÊ   rË   rÌ   rJ   r   r¬   r®   ra   rè   rZ   Ú__classcell__r%   r%   râ   r&   rÀ   U  s   $
	rÀ   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 )rÂ   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$   z7ModelState.fields cannot be bound to a model - "%s" is.r!   z_ModelState.fields cannot refer to a model class - "%s.to" does. Use a string reference instead.zdModelState.fields cannot refer to a model class - "%s.through" does. Use a string reference instead.zKIndexes passed to ModelState require a name attribute. %r doesn't have one.)r"   rb   r²   rf   rp   Ú
setdefaultr   r)   r¸   r|   rY   ÚhasattrrÞ   r/   r0   Zmany_to_manyrd   re   )	rI   r"   rb   rf   rp   r¸   r|   rm   r‡   r%   r%   r&   rJ   Ò  s@    



ÿÿÿÿÿÿÿzModelState.__init__c                 C   s
   | j  ¡ S rK   )rb   r`   rM   r%   r%   r&   rP   ö  s    zModelState.name_lowerc                 C   s    |dkr| j  d|¡}| j| S )NÚ_orderÚorder_with_respect_to)rp   rw   rf   )rI   rŸ   r%   r%   r&   Ú	get_fieldú  s    zModelState.get_fieldFc                    sX  g }ˆj jD ]z}t|ddƒr"|r"qt|tjƒr0q|j}z| || ¡ f¡ W q t	k
r„ } zt	d|ˆj j
|f ƒ‚W 5 d}~X Y qX q|sðˆj jD ]Z}|j}z| || ¡ f¡ W q” t	k
rì } zt	d|ˆj j|f ƒ‚W 5 d}~X Y q”X q”i }tD ]ä}|dk�r
qøqø|ˆj jkrø|dk�r>ˆj jd }tt|ƒƒ||< qø|dk�rfˆj jd }	tt|	ƒƒ||< qø|dk�rªd	d
„ ˆj jD ƒ}
|
D ]}|j�s†| ˆ¡ �q†|
|d< qø|dk�rÌdd
„ ˆj jD ƒ|d< qøˆj j| ||< qø|�rdD ]}||k�rè||= �qèn$| d¡dd„ ˆj jD ƒk�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|k�r¨�q’nb|j�rÄt |¡}| ¡  nF|ˆjk�sÜ|ˆjk�r’t  ¡ }|j!|_!|j|_|ˆjk�r
|}n�q’| "|j¡ | |j|f¡ �q’|d|fgk�r>g }| ˆj j#ˆj j||||ƒS )z3Given a model, return a ModelState representing it.rd   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  s     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   rí   rí   c                 S   s   h | ]
}|j ’qS r%   r€   )r*   rm   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__rë   r!   Zabstractr=   r2   )r$   r¸   r¹   )Úflatten_basesr%   r&   rò   H  s    
z,ModelState.from_model.<locals>.flatten_basesc                    s   ˆ j  | ¡S rK   )Ú__mro__r‡   )Úxr;   r%   r&   Ú<lambda>W  ó    z'ModelState.from_model.<locals>.<lambda>©rq   c                 s   s$   | ]}t |d ƒr|jjn|V  qdS )r!   N)rë   r!   Zlabel_lower©r*   r¹   r%   r%   r&   rÙ   [  s   ÿz(ModelState.from_model.<locals>.<genexpr>c                 s   s$   | ]}t |tƒpt|tjƒV  qd S rK   )r   r   r(   r   r)   rø   r%   r%   r&   rÙ   `  s    Zobjects)$r!   Zlocal_fieldsr¡   r   r   ZOrderWrtrb   r2   ra   Ú	TypeErrorrÐ   Zlocal_many_to_manyZobject_namer   Zoriginal_attrsr.   r   r…   Zset_name_with_modelr�   rw   Zprivate_fieldsrÛ   r    Úanyr)   r|   Zuse_in_migrationsræ   Z_set_creation_counterZ_base_managerZ_default_managerÚManagerr$   r1   r"   )rÄ   r$   rÓ   rf   rm   rb   Úerp   ÚutÚitr…   r‡   rq   Zflattened_basesr¸   r|   Zmanager_namesZdefault_manager_shimÚmanagerZnew_managerr%   )rò   r$   r&   rÃ   ÿ  sÌ    ýÿÿýÿÿ	





ÿ
ÿ

 
ÿþÿ


úzModelState.from_modelc                 c   sj   t | jdd„ d�}|D ]N\}}| ¡ \}}}}}|rLt|ƒ}	||	 ¡ fV  qt|ƒ}
||
||ŽfV  qdS )z-Deep-clone the managers using deconstruction.c                 S   s
   | d j S )Nr   )Zcreation_counter)r¼   r%   r%   r&   rõ   �  rö   z/ModelState.construct_managers.<locals>.<lambda>r÷   N)rÛ   r|   Údeconstructr   Ú
as_manager)rI   Zsorted_managersZmgr_namerÿ   r  Zmanager_pathZqs_pathÚargsÚkwargsZqs_classZmanager_classr%   r%   r&   Úconstruct_managersŠ  s    zModelState.construct_managersc                 C   s.   | j | j| jt| jƒt| jƒ| jt| jƒd�S )z(Return an exact copy of this ModelState.)r"   rb   rf   rp   r¸   r|   )	rã   r"   rb   r²   rf   rp   r¸   rX   r|   rM   r%   r%   r&   ra   —  s    ÷zModelState.clonec                    s    | j ˆ dœ| j–}tdd|ƒ}zt‡ fdd„| jD ƒƒ}W n$ tk
r^   td| jf ƒ‚Y nX 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 rK   )r   r   r§   rø   r   r%   r&   rÙ   ¬  s   ÿz$ModelState.render.<locals>.<genexpr>z(Cannot resolve one or more bases from %rc                 S   s   i | ]\}}||  ¡ “qS r%   rº   )r*   rb   rm   r%   r%   r&   r½   µ  s      z%ModelState.render.<locals>.<dictcomp>Z__fake__rÊ   )r"   rp   Útyper    r¸   r¨   r   rf   rY   r©   r  rb   )rI   r   Zmeta_contentsÚmetar¸   Úbodyr%   r   r&   rå   ¥  s    þ
ÿ
zModelState.renderc                 C   s8   | j d D ]}|j|kr
|  S q
td|| jf ƒ‚d S )Nr…   zNo index named %s on model %s©rp   rb   rÞ   )rI   rb   r‡   r%   r%   r&   Úget_index_by_name¾  s    

zModelState.get_index_by_namec                 C   s8   | j d D ]}|j|kr
|  S q
td|| jf ƒ‚d S )Nr�   z"No constraint named %s on model %sr  )rI   rb   rŽ   r%   r%   r&   Úget_constraint_by_nameÄ  s    

z!ModelState.get_constraint_by_namec                 C   s   d| j j| j| jf S )Nz<%s: '%s.%s'>)rã   rÉ   r"   rb   rM   r%   r%   r&   Ú__repr__Ê  s    zModelState.__repr__c                 C   s|   | j |j koz| j|jkozt| jƒt|jƒkoztdd„ tt| j ¡ ƒt|j ¡ ƒƒD ƒƒoz| j|jkoz| j	|j	koz| j
|j
kS )Nc                 s   sB   | ]:\\}}\}}||ko8|  ¡ d d… |  ¡ d d… kV  qdS )r   N)r   )r*   Zk1Úf1Zk2Úf2r%   r%   r&   rÙ   Ò  s   ÿz$ModelState.__eq__.<locals>.<genexpr>)r"   rb   r   rf   ÚallÚziprÛ   rY   rp   r¸   r|   rÆ   r%   r%   r&   rÈ   Í  s$    
ÿþþþý

ö
õ
ózModelState.__eq__)NNN)F)rÉ   rÊ   rË   rÌ   rJ   r   rP   rî   rÎ   rÃ   r  ra   rå   r	  r
  r  rÈ   r%   r%   r%   r&   rÂ   Ç  s$        ÿ
$
 rÂ   )r   )1ræ   Úcollectionsr   Ú
contextlibr   Ú	functoolsr   Zdjango.appsr   Zdjango.apps.registryr   r   rÚ   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   rÏ   rÀ   rÂ   r%   r%   r%   r&   Ú<module>   s<   
   kr