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o �h�1 � @ s� d dl mZ d dlmZ d dlmZ ddlmZ G dd� de�ZG dd � d e�Z G d d � d e�Z G d d � d e�Z G dd� de�Z dS )� )�field_references)� NOT_PROVIDED)�cached_property� )� Operationc s^ e Zd Zddd�Zedd� �Zedd� �Zdd � Zd d � Zd d � Z dd� Z � fdd�Z � Z S )�FieldOperationNc C s || _ || _|| _d S �N�� model_name�name�field)�selfr r r � r �Y/usr/local/CyberCP/lib/python3.10/site-packages/django/db/migrations/operations/fields.py�__init__ s zFieldOperation.__init__c C � | j �� S r )r �lower�r r r r �model_name_lower � z FieldOperation.model_name_lowerc C r r )r r r r r r � name_lower r zFieldOperation.name_lowerc C s | j |j kS r )r �r � operationr r r �is_same_model_operation s z&FieldOperation.is_same_model_operationc C s | � |�o | j|jkS r )r r r r r r �is_same_field_operation s �z&FieldOperation.is_same_field_operationc C s< |� � }|| jkr dS | jr tt|| jf| j||f��S dS )NTF)r r r �boolr )r r � app_labelr r r r �references_model s ��z FieldOperation.references_modelc C sn |� � }|| jkr!|| jkrdS | jr!t| jd�r!|| jjv r!dS | jd u r(dS tt|| jf| j||f|��S )NT� from_fieldsF)r r r r �hasattrr r r )r r r r r r r r �references_field- s( � � ��z FieldOperation.references_fieldc s" t � �||�p|�| j| j|� S r )�super�reducer r r �r r r �� __class__r r r" E s �zFieldOperation.reducer ) �__name__� __module__� __qualname__r r r r r r r r r" � __classcell__r r r$ r r s r c �b e Zd ZdZd� fdd� Zdd� Zdd� Zd d � Zd d � Zd d� Z e dd� �Z � fdd�Z � Z S )�AddFieldzAdd a field to a model.Tc � || _ t� �|||� d S r ��preserve_defaultr! r �r r r r r. r$ r r r N � zAddField.__init__c C �4 | j | j| jd�}| jdur| j|d< | jjg |fS �Nr Tr. �r r r r. r% r& �r �kwargsr r r � deconstructR � � zAddField.deconstructc C � |� || j| j| j| j� d S r )� add_fieldr r r r. �r r �stater r r �state_forwards\ � �zAddField.state_forwardsc C sr |j �|| j�}| �|jj|�r5|j �|| j�}|j�| j�}| j s'| j j |_ |� ||� | j s7t |_ d S d S d S r )�apps� get_modelr �allow_migrate_model� connection�alias�_meta� get_fieldr r. r �defaultr9 r )r r � schema_editor� from_state�to_state�to_model� from_modelr r r r �database_forwardse s � � zAddField.database_forwardsc C �> |j �|| j�}| �|jj|�r |�||j�| j �� d S d S r � r> r? r r@ rA rB � remove_fieldrC rD r �r r rF rG rH rJ r r r �database_backwardss � ��zAddField.database_backwardsc C � d| j | jf S )NzAdd field %s to %s�r r r r r r �describez � zAddField.describec C rR )Nz%s_%s�r r r r r r �migration_name_fragment} � z AddField.migration_name_fragmentc sp t |t�r1| �|�r1t |t�rt| j|j|jd�gS t |t�r!g S t |t �r1t| j|j | jd�gS t � � ||�S �Nr ) � isinstancer r � AlterFieldr+ r r r � RemoveField� RenameField�new_namer! r" r# r$ r r r" � s( � �� ��zAddField.reduce�T�r& r' r( �__doc__r r6 r< rK rP rT �propertyrW r" r) r r r$ r r+ K s r+ c sT e Zd ZdZdd� Zdd� Zdd� Zdd � Zd d � Ze d d � �Z � fdd�Z � Z S )r\ z Remove a field from a model.c C s | j | jd�}| jjg |fS )N)r r )r r r% r& r4 r r r r6 � s �zRemoveField.deconstructc C s |� || j| j� d S r )rN r r r: r r r r< � s zRemoveField.state_forwardsc C rL r rM rO r r r rK � rQ z RemoveField.database_forwardsc C sN |j �|| j�}| �|jj|�r%|j �|| j�}|�||j�| j �� d S d S r ) r> r? r r@ rA rB r9 rC rD r �r r rF rG rH rI rJ r r r rP � s �z RemoveField.database_backwardsc C rR )NzRemove field %s from %srS r r r r rT � rU zRemoveField.describec C rR )Nz remove_%s_%srV r r r r rW � rX z#RemoveField.migration_name_fragmentc s6 ddl m} t||�r|j| jkr|gS t� �||�S )Nr )� DeleteModel)�modelsrd rZ r r r! r" )r r r rd r$ r r r" � s � zRemoveField.reduce) r& r' r( ra r6 r< rK rP rT rb rW r" r) r r r$ r r\ � s r\ c r* )r[ z` Alter a field's database column (e.g. null, max_length) to the provided new field. Tc r, r r- r/ r$ r r r � r0 zAlterField.__init__c C r1 r2 r3 r4 r r r r6 � r7 zAlterField.deconstructc C r8 r )� alter_fieldr r r r. r: r r r r< � r= zAlterField.state_forwardsc C s� |j �|| j�}| �|jj|�r=|j �|| j�}|j�| j�}|j�| j�}| j s.| j j |_ |� |||� | j s?t |_ d S d S d S r )r> r? r r@ rA rB rC rD r r. r rE rf r ) r r rF rG rH rI rJ � from_field�to_fieldr r r rK � s �z AlterField.database_forwardsc C s | � ||||� d S r )rK )r r rF rG rH r r r rP � s z AlterField.database_backwardsc C rR )NzAlter field %s on %srS r r r r rT � rU zAlterField.describec C rR )Nz alter_%s_%srV r r r r rW � rX z"AlterField.migration_name_fragmentc s` t |t�r | �|�r |gS t |t�r)| �|�r)| jjd u r)|t| j|j| jd�gS t � � ||�S rY ) rZ r\ r r] r � db_columnr[ r r^ r! r" r# r$ r r r" � s" ��� ��zAlterField.reducer_ r` r r r$ r r[ � s r[ c s� e Zd ZdZ� fdd�Zedd� �Zedd� �Zdd � Zd d � Z d d � Z dd� Z dd� Z e dd� �Zdd� Z� fdd�Z� ZS )r] z8Rename a field on the model. Might affect db_column too.c s || _ || _t� �||� d S r )�old_namer^ r! r )r r rj r^ r$ r r r s zRenameField.__init__c C r r )rj r r r r r �old_name_lower r zRenameField.old_name_lowerc C r r )r^ r r r r r �new_name_lower r zRenameField.new_name_lowerc C s | j | j| jd�}| jjg |fS )N)r rj r^ )r rj r^ r% r& r4 r r r r6 s �zRenameField.deconstructc C s |� || j| j| j� d S r )� rename_fieldr rj r^ r: r r r r< & s �zRenameField.state_forwardsc C �Z |j �|| j�}| �|jj|�r+|j �|| j�}|�||j�| j �|j�| j �� d S d S r ) r> r? r r@ rA rB rf rC rD rj r^ rc r r r rK + � ��z RenameField.database_forwardsc C rn r ) r> r? r r@ rA rB rf rC rD r^ rj rc r r r rP 5 ro z RenameField.database_backwardsc C � d| j | j| jf S )NzRename field %s on %s to %s)rj r r^ r r r r rT ? s �zRenameField.describec C rp )Nzrename_%s_%s_%s)rk r rl r r r r rW F s �z#RenameField.migration_name_fragmentc C s( | � ||�o|�� | jkp|�� | jkS r )r r rk rl )r r r r r r r r N s �z RenameField.references_fieldc sl t |t�r| �|�r| j|jkrt| j| j|j�gS tt | �� ||�p5|� | j| j|�p4|� | j| j|� S r ) rZ r] r rl rk r rj r^ r! r r" r r# r$ r r r" S s �� �� �zRenameField.reduce)r& r' r( ra r r rk rl r6 r< rK rP rT rb rW r r" r) r r r$ r r] s r] N) �django.db.migrations.utilsr �django.db.modelsr �django.utils.functionalr �baser r r+ r\ r[ r] r r r r �<module> s CO,H
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