|
Server : Apache System : Linux iad1-shared-b8-43 6.6.49-grsec-jammy+ #10 SMP Thu Sep 12 23:23:08 UTC 2024 x86_64 User : dh_edsupp ( 6597262) PHP Version : 8.2.26 Disable Function : NONE Directory : /lib/python3/dist-packages/django/contrib/postgres/__pycache__/ |
Upload File : |
o
3�a� � @ sb d dl mZ d dlmZmZ d dlmZmZmZ d dl m
Z
d dl m Z dgZ
G dd� de
�ZdS ) � )�NotSupportedError)� Statement�Table)�
Deferrable�F�Q)�BaseConstraint)�Query�ExclusionConstraintc s~ e Zd ZdZdddddd�� fdd�
Zdd� Zd d
� Zd d � Zd
d� Zdd� Z dd� Z
� fdd�Z � fdd�Z dd� Z
� ZS )r
zdCONSTRAINT %(name)s EXCLUDE USING %(index_type)s (%(expressions)s)%(include)s%(where)s%(deferrable)sN� )�
index_type� condition�
deferrable�include� opclassesc s2 |r |� � dvr td��|std��tdd� |D ��s td��t|td �tf�s,td��|r4|r4td��t|td �tf�sAtd ��t|td �ttf�sOtd
��|r]|r]|� � d kr]td ��t|ttf�shtd
��|rvt |�t |�krvtd��|| _
|p|d| _ || _ || _
|r�t|�nd| _|| _t� j|d� d S )N> �gist�spgistz;Exclusion constraints only support GiST or SP-GiST indexes.zFAt least one expression is required to define an exclusion constraint.c s s* � | ]}t |ttf�ot|�d kV qdS )� N)�
isinstance�list�tuple�len)�.0�exprr r �E/usr/lib/python3/dist-packages/django/contrib/postgres/constraints.py� <genexpr> s
� �
�z/ExclusionConstraint.__init__.<locals>.<genexpr>z+The expressions must be a list of 2-tuples.z3ExclusionConstraint.condition must be a Q instance.z7ExclusionConstraint with conditions cannot be deferred.z=ExclusionConstraint.deferrable must be a Deferrable instance.z4ExclusionConstraint.include must be a list or tuple.r z9Covering exclusion constraints only support GiST indexes.z6ExclusionConstraint.opclasses must be a list or tuple.zhExclusionConstraint.expressions and ExclusionConstraint.opclasses must have the same number of elements.�GISTr )�name)�lower�
ValueError�allr �typer r r r r � expressionsr r
r r r �super�__init__)�selfr r" r r
r r r �� __class__r r r$
s^ ����������
z ExclusionConstraint.__init__c s� g }t | j�D ]K\}\}}t|t�rt|�}|j|d�}|�|�\}} z| j| }
|
r1d||
f }W n ty; Y nw |t � fdd�| D �� }|�
d||f � q|S )N)�queryz%s %sc 3 � � | ]}� � |�V qd S �N�� quote_value�r �p��
schema_editorr r r R � � z:ExclusionConstraint._get_expression_sql.<locals>.<genexpr>z
%s WITH %s) � enumerater" r �strr �resolve_expression�compiler �
IndexErrorr �append) r% �compilerr0 r( r" �idx�
expression�operator�sql�params�opclassr r/ r �_get_expression_sqlE s"
� �z'ExclusionConstraint._get_expression_sqlc sF | j d u rd S |�| j �}|�|� j�\}}|t� fdd�|D �� S )Nc 3 r) r* r+ r- r/ r r r [ r1 z9ExclusionConstraint._get_condition_sql.<locals>.<genexpr>)r
� build_where�as_sql�
connectionr )r% r8 r0 r( �wherer< r= r r/ r �_get_condition_sqlV s
z&ExclusionConstraint._get_condition_sqlc s� t � dd�}|j|jd�}| �|||�}| �|||�}� fdd�| jD �}| j|�| j�| j d�
|�|� � |�|r=d| nd|� | j
�d � S )
NF)�
alias_cols)rB c s g | ] }� j �|�j�qS r )�_meta� get_field�column)r �
field_name��modelr r �
<listcomp>b s z6ExclusionConstraint.constraint_sql.<locals>.<listcomp>z, z WHERE (%s)� )r r r" r rC r )r � get_compilerrB r? rD r �template�
quote_namer r �join�_index_include_sql�_deferrable_constraint_sqlr )r% rK r0 r( r8 r" r
r r rJ r �constraint_sql] s
�z"ExclusionConstraint.constraint_sqlc C s, | � |� tdt|jj|j�| �||�d�S )Nz(ALTER TABLE %(table)s ADD %(constraint)s)�table�
constraint)�check_supportedr r rF �db_tablerP rT �r% rK r0 r r r �
create_sqll s
�z ExclusionConstraint.create_sqlc C s |� |j||�| j��S r* )�_delete_constraint_sql�sql_delete_checkrP r rY r r r �
remove_sqlt s
�z ExclusionConstraint.remove_sqlc C s | j r |jjjstd��d S d S )Nz7Covering exclusion constraints requires PostgreSQL 12+.)r rB �features� supports_covering_gist_indexesr )r% r0 r r r rW { s
��z#ExclusionConstraint.check_supportedc s� t � �� \}}}| j|d< | jd ur| j|d< | j�� dkr#| j|d< | jr+| j|d< | jr3| j|d< | jr;| j|d< |||fS )Nr" r
r r r r r ) r# � deconstructr" r
r r r r r )r% �path�args�kwargsr& r r r` � s
z ExclusionConstraint.deconstructc sl t || j�r0| j|jko/| j|jko/| j|jko/| j|jko/| j|jko/| j|jko/| j|jkS t � �
|�S r* ) r r' r r r" r
r r r r# �__eq__)r% �otherr& r r rd � s
�
�
�
�
�
� zExclusionConstraint.__eq__c
C sr d| j j| j| j| jd u rdnd| j | jd u rdnd| j | js#dndt| j� | js0df S dt| j� f S )Nz+<%s: index_type=%s, expressions=%s%s%s%s%s>rM z, condition=%sz, deferrable=%sz , include=%sz, opclasses=%s) r' � __qualname__r r" r
r r �reprr )r% r r r �__repr__� s � �z ExclusionConstraint.__repr__)�__name__�
__module__rf rO r$ r? rD rT rZ r] rW r` rd rh �
__classcell__r r r& r r
s �8
N)� django.dbr �!django.db.backends.ddl_referencesr r �django.db.modelsr r r � django.db.models.constraintsr �django.db.models.sqlr �__all__r
r r r r �<module> s