Django Shell更新对象值

# myapp/models.py
from django.db import models

class Book(models.Model):
    title = models.CharField(max_length=100)
    author = models.CharField(max_length=100)
    published_date = models.DateField()

# 启动Django Shell
python manage.py shell

# 导入模型
from myapp.models import Book

# 查询对象
book = Book.objects.get(id=1)

# 更新对象属性
book.title = "New Title"
book.author = "New Author"

# 保存对象
book.save()

book.save()

try:
    book = Book.objects.get(id=1)
except Book.DoesNotExist:
    print("Book does not exist")

from django.db import transaction

with transaction.atomic():
    book = Book.objects.select_for_update().get(id=1)
    book.title = "New Title"
    book.save()