OwlCyberSecurity - MANAGER
Edit File: reverse_related.cpython-39.pyc
a kH�f�0 � @ s� d Z ddlmZ ddlmZ ddlmZ ddlmZ ddl m Z G dd � d e �Z G d d � d e �Z G d d � d e �Z G dd� de �ZdS )al "Rel objects" for related fields. "Rel objects" (for lack of a better name) carry information about the relation modeled by a related field and provide some utility functions. They're stored in the ``remote_field`` attribute of the field. They also act as reverse fields for the purposes of the Meta API because they're the closest concept currently available. � )� exceptions)�cached_property)� make_hashable� )�BLANK_CHOICE_DASH)�FieldCacheMixinc @ sP e Zd ZdZdZdZdZdZdZdZ d@dd�Z e dd� �Z e d d � �Z ed d � �Zed d� �Ze dd� �Ze dd� �Ze dd� �Ze dd� �Ze dd� �Zdd� Zdd � Zd d � Zd d � Zed!d"� �Zd#d$� Zed%d&� �Z d'd(� Z d)d*� Z d+d,� Z de dd-fd.d/�Z!d0d1� Z"d2d3� Z#d4d5� Z$d6d7� Z%dAd8d9�Z&dBd:d;�Z'e d<d=� �Z(d>d?� Z)dS )C�ForeignObjectRelz� Used by ForeignObject to store information about the relation. ``_meta.get_fields()`` returns this class to provide access to the field flags for the reverse relation. TFNc C sF || _ || _|| _|| _|d u r$i n|| _|| _|| _d| _d| _d S )NFT) �field�model� related_name�related_query_name�limit_choices_to� parent_link� on_delete� symmetrical�multiple)�selfr �tor r r r r � r �i/home/gouroczh/virtualenv/test/3.9/lib/python3.9/site-packages/django/db/models/fields/reverse_related.py�__init__' s zForeignObjectRel.__init__c C s | � � S �N)� is_hidden�r r r r �hidden@ s zForeignObjectRel.hiddenc C s | j �� S r )r r r r r r �nameD s zForeignObjectRel.namec C s | j S r )r r r r r � remote_fieldH s z ForeignObjectRel.remote_fieldc C s* | j d j}t|�dkr"t�d��|d S )z� When filtering against this relation, return the field on the remote model against which the filtering should happen. ���r z1Can't use target_field for multicolumn relations.r )� path_infos� target_fields�lenr Z FieldError)r r r r r � target_fieldL s �z ForeignObjectRel.target_fieldc C s | j jstd��| j jS )NzVThis property can't be accessed before self.field.contribute_to_class has been called.)r r �AttributeErrorr r r r � related_modelY s �z ForeignObjectRel.related_modelc C s | j jS r )r � many_to_manyr r r r r$ b s z ForeignObjectRel.many_to_manyc C s | j jS r )r � one_to_manyr r r r � many_to_onef s z ForeignObjectRel.many_to_onec C s | j jS r )r r& r r r r r% j s z ForeignObjectRel.one_to_manyc C s | j jS r )r � one_to_oner r r r r' n s zForeignObjectRel.one_to_onec C s | j �|�S r )r � get_lookup)r � lookup_namer r r r( r s zForeignObjectRel.get_lookupc C s | j �� S r )r � get_lookupsr r r r r* u s z ForeignObjectRel.get_lookupsc C s | j �|�S r )r � get_transform)r r r r r r+ x s z ForeignObjectRel.get_transformc C s | j �� S r )r �get_internal_typer r r r r, { s z"ForeignObjectRel.get_internal_typec C s | j jS r )r �db_typer r r r r- ~ s zForeignObjectRel.db_typec C s dt | �j| jjj| jjjf S )Nz <%s: %s.%s>)�type�__name__r# �_metaZ app_label� model_namer r r r �__repr__� s �zForeignObjectRel.__repr__c C s, | j | j| j| jt| j�| j| j| j| j f S r ) r r r r r r r r r r r r r r �identity� s �zForeignObjectRel.identityc C s t || j�stS | j|jkS r )� isinstance� __class__�NotImplementedr3 )r �otherr r r �__eq__� s zForeignObjectRel.__eq__c C s t | j�S r )�hashr3 r r r r �__hash__� s zForeignObjectRel.__hash__c C s | j �� }|�dd � |S )Nr )�__dict__�copy�pop�r �stater r r � __getstate__� s z ForeignObjectRel.__getstate__r c C s@ |p| j }| jj�|�}|r&|j|� }|r.|ng dd� |D � S )a Return choices with a default blank choices included, for use as <select> choices for this field. Analog of django.db.models.fields.Field.get_choices(), provided initially for utilization by RelatedFieldListFilter. c S s g | ]}|j t|�f�qS r )�pk�str)�.0�xr r r � <listcomp>� � z0ForeignObjectRel.get_choices.<locals>.<listcomp>)r r# Z_default_managerZcomplex_filterZorder_by)r Z include_blankZ blank_choicer Zordering�qsr r r � get_choices� s z ForeignObjectRel.get_choicesc C s t | j�o| jd dkS )z$Should the related object be hidden?r �+)�boolr r r r r r � s zForeignObjectRel.is_hiddenc C s | j �� S r )r Zget_reverse_joining_columnsr r r r �get_joining_columns� s z$ForeignObjectRel.get_joining_columnsc C s | j �||�S r )r �get_extra_restriction)r �aliasZ related_aliasr r r rL � s z&ForeignObjectRel.get_extra_restrictionc C s d| _ dS )z� Set the related field's name, this is not available until later stages of app loading, so set_field_name is called from set_attributes_from_rel() N)� field_namer r r r �set_field_name� s z ForeignObjectRel.set_field_namec C sV |r |j n| jj }|p| j}| jr6| jr6|| jkr6d S | jrB| jS |j| jrPdnd S )NZ_set� )r0 r# r r r r r1 )r r �optsr r r �get_accessor_name� s z"ForeignObjectRel.get_accessor_namec C s |r| j �|�S | j jS d S r )r Zget_reverse_path_infoZreverse_path_infos)r Zfiltered_relationr r r � get_path_info� s z ForeignObjectRel.get_path_infoc C s | � � S r )rS r r r r r � s zForeignObjectRel.path_infosc C s | � � S )z� Return the name of the cache key to use for storing an instance of the forward model on the reverse model. )rR r r r r �get_cache_name� s z ForeignObjectRel.get_cache_name)NNNFN)N)N)*r/ � __module__� __qualname__�__doc__Z auto_created�concrete�editableZ is_relation�nullZempty_strings_allowedr r r r �propertyr r! r# r$ r& r% r' r( r* r+ r, r- r2 r3 r8 r: r@ r rH r rK rL rO rR rS r rT r r r r r sr � � r c sN e Zd ZdZd� fdd� Z� fdd�Ze� fdd ��Zd d � Zd d � Z � Z S )� ManyToOneRela+ Used by the ForeignKey field to store information about the relation. ``_meta.get_fields()`` returns this class to provide access to the field flags for the reverse relation. Note: Because we somewhat abuse the Rel objects by using them as reverse fields we get the funny situation where ``ManyToOneRel.many_to_one == False`` and ``ManyToOneRel.one_to_many == True``. This is unfortunate but the actual ManyToOneRel class is a private API and there is work underway to turn reverse relations into actual fields. NFc s$ t � j|||||||d� || _d S )N�r r r r r )�superr rN � r r r rN r r r r r �r5 r r r s � zManyToOneRel.__init__c s t � �� }|�dd � |S )Nr# )r^ r@ r= r> r` r r r@ s zManyToOneRel.__getstate__c s t � j| jf S r )r^ r3 rN r r` r r r3 " s zManyToOneRel.identityc C s* | j j�| j�}|js&t�d| j ��|S )zY Return the Field in the 'to' object to which this relationship is tied. zNo related field named '%s')r r0 � get_fieldrN rX r ZFieldDoesNotExist)r r r r r �get_related_field& s �z ManyToOneRel.get_related_fieldc C s | j p| jjjj| _ d S r )rN r r0 rA r r r r r rO 1 s zManyToOneRel.set_field_name)NNNFN) r/ rU rV rW r r@ r[ r3 rb rO � __classcell__r r r` r r\ � s � r\ c s" e Zd ZdZd� fdd� Z� ZS )� OneToOneRelz� Used by OneToOneField to store information about the relation. ``_meta.get_fields()`` returns this class to provide access to the field flags for the reverse relation. NFc s& t � j||||||||d� d| _d S )Nr] F)r^ r r r_ r` r r r = s � zOneToOneRel.__init__)NNNFN)r/ rU rV rW r rc r r r` r rd 5 s �rd c s: e Zd ZdZd � fdd� Ze� fdd��Zdd � Z� ZS ) � ManyToManyRelz� Used by ManyToManyField to store information about the relation. ``_meta.get_fields()`` returns this class to provide access to the field flags for the reverse relation. NTc sR t � j|||||d� |r&| s&td��|| _|r<|s<td��|| _|| _| | _d S )N)r r r z4Can't supply a through model and db_constraint=Falsez5Cannot specify through_fields without a through model)r^ r � ValueError�through�through_fieldsr � db_constraint) r r r r r r r rg rh ri r` r r r ^ s �zManyToManyRel.__init__c s t � j| jt| j�| jf S r )r^ r3 rg r rh ri r r` r r r3 } s �zManyToManyRel.identityc C sV | j j}| jr |�| jd �}n,|jD ]$}t|dd�}|r&|j| jkr& qLq&|jd S )z� Return the field in the 'to' object to which this relationship is tied. Provided for symmetry with ManyToOneRel. r r N)rg r0 rh ra �fields�getattrr Zforeign_related_fields)r rQ r �relr r r rb � s z ManyToManyRel.get_related_field)NNNTNNT) r/ rU rV rW r r[ r3 rb rc r r r` r re V s � re N)rW Z django.corer Zdjango.utils.functionalr Zdjango.utils.hashabler rP r Zmixinsr r r\ rd re r r r r �<module> s d>!