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271542dad1
A race condition happened when the object didn't already exist and another process/thread created the object before update_or_create() did and then attempted to update the object, also before update_or_create() saved the object. The update by the other process/thread could be lost.
65 lines
1.6 KiB
Python
65 lines
1.6 KiB
Python
from django.db import models
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class Person(models.Model):
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first_name = models.CharField(max_length=100, unique=True)
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last_name = models.CharField(max_length=100)
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birthday = models.DateField()
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defaults = models.TextField()
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def __str__(self):
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return '%s %s' % (self.first_name, self.last_name)
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class DefaultPerson(models.Model):
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first_name = models.CharField(max_length=100, default="Anonymous")
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class ManualPrimaryKeyTest(models.Model):
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id = models.IntegerField(primary_key=True)
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data = models.CharField(max_length=100)
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class Profile(models.Model):
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person = models.ForeignKey(Person, models.CASCADE, primary_key=True)
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class Tag(models.Model):
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text = models.CharField(max_length=255, unique=True)
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class Thing(models.Model):
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name = models.CharField(max_length=255)
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tags = models.ManyToManyField(Tag)
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@property
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def capitalized_name_property(self):
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return self.name
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@capitalized_name_property.setter
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def capitalized_name_property(self, val):
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self.name = val.capitalize()
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@property
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def name_in_all_caps(self):
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return self.name.upper()
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class Publisher(models.Model):
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name = models.CharField(max_length=100)
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class Author(models.Model):
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name = models.CharField(max_length=100)
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class Book(models.Model):
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name = models.CharField(max_length=100)
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authors = models.ManyToManyField(Author, related_name='books')
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publisher = models.ForeignKey(
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Publisher,
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models.CASCADE,
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related_name='books',
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db_column="publisher_id_column",
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)
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