我在尝试向数据库添加数据时,在Django管理员中遇到完整性错误。
回溯如下:
Environment:
Request Method: POST
Request URL: http://127.0.0.1:8000/site/admin/SilverInningsHelpline/classified/add/
Django Version: 1.6.4
Python Version: 2.7.3
Installed Applications:
('django_admin_bootstrapped.bootstrap3',
'django_admin_bootstrapped',
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'SilverInningsHelpline',
'south')
Installed Middleware:
('django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware')
Traceback:
File "/home/siddharth/SilverInnings/venv/local/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
114. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/home/siddharth/SilverInnings/venv/local/lib/python2.7/site-packages/django/contrib/admin/options.py" in wrapper
432. return self.admin_site.admin_view(view)(*args, **kwargs)
File "/home/siddharth/SilverInnings/venv/local/lib/python2.7/site-packages/django/utils/decorators.py" in _wrapped_view
99. response = view_func(request, *args, **kwargs)
File "/home/siddharth/SilverInnings/venv/local/lib/python2.7/site-packages/django/views/decorators/cache.py" in _wrapped_view_func
52. response = view_func(request, *args, **kwargs)
File "/home/siddharth/SilverInnings/venv/local/lib/python2.7/site-packages/django/contrib/admin/sites.py" in inner
198. return view(request, *args, **kwargs)
File "/home/siddharth/SilverInnings/venv/local/lib/python2.7/site-packages/django/utils/decorators.py" in _wrapper
29. return bound_func(*args, **kwargs)
File "/home/siddharth/SilverInnings/venv/local/lib/python2.7/site-packages/django/utils/decorators.py" in _wrapped_view
99. response = view_func(request, *args, **kwargs)
File "/home/siddharth/SilverInnings/venv/local/lib/python2.7/site-packages/django/utils/decorators.py" in bound_func
25. return func(self, *args2, **kwargs2)
File "/home/siddharth/SilverInnings/venv/local/lib/python2.7/site-packages/django/db/transaction.py" in inner
371. return func(*args, **kwargs)
File "/home/siddharth/SilverInnings/venv/local/lib/python2.7/site-packages/django/contrib/admin/options.py" in add_view
1131. self.save_model(request, new_object, form, False)
File "/home/siddharth/SilverInnings/venv/local/lib/python2.7/site-packages/django/contrib/admin/options.py" in save_model
860. obj.save()
File "/home/siddharth/SilverInnings/venv/local/lib/python2.7/site-packages/django/db/models/base.py" in save
545. force_update=force_update, update_fields=update_fields)
File "/home/siddharth/SilverInnings/venv/local/lib/python2.7/site-packages/django/db/models/base.py" in save_base
573. updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
File "/home/siddharth/SilverInnings/venv/local/lib/python2.7/site-packages/django/db/models/base.py" in _save_table
654. result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)
File "/home/siddharth/SilverInnings/venv/local/lib/python2.7/site-packages/django/db/models/base.py" in _do_insert
687. using=using, raw=raw)
File "/home/siddharth/SilverInnings/venv/local/lib/python2.7/site-packages/django/db/models/manager.py" in _insert
232. return insert_query(self.model, objs, fields, **kwargs)
File "/home/siddharth/SilverInnings/venv/local/lib/python2.7/site-packages/django/db/models/query.py" in insert_query
1511. return query.get_compiler(using=using).execute_sql(return_id)
File "/home/siddharth/SilverInnings/venv/local/lib/python2.7/site-packages/django/db/models/sql/compiler.py" in execute_sql
903. cursor.execute(sql, params)
File "/home/siddharth/SilverInnings/venv/local/lib/python2.7/site-packages/django/db/backends/util.py" in execute
69. return super(CursorDebugWrapper, self).execute(sql, params)
File "/home/siddharth/SilverInnings/venv/local/lib/python2.7/site-packages/django/db/backends/util.py" in execute
53. return self.cursor.execute(sql, params)
File "/home/siddharth/SilverInnings/venv/local/lib/python2.7/site-packages/django/db/utils.py" in __exit__
99. six.reraise(dj_exc_type, dj_exc_value, traceback)
File "/home/siddharth/SilverInnings/venv/local/lib/python2.7/site-packages/django/db/backends/util.py" in execute
53. return self.cursor.execute(sql, params)
Exception Type: IntegrityError at /site/admin/SilverInningsHelpline/classified/add/
Exception Value: null value in column "category_id" violates not-null constraint
我的模型如下:
class Categories(models.Model):
id = models.AutoField(primary_key=True)
type = models.CharField(max_length=300)
def __unicode__(self):
return self.type
class Subcategory(models.Model):
id = models.AutoField(primary_key=True)
parent = models.ForeignKey(Categories)
name = models.CharField(max_length=300)
def __unicode__(self):
return self.name
class Classified(models.Model):
id = models.AutoField(primary_key=True)
name = models.CharField(max_length=256)
contact_person = models.CharField(max_length=300)
email = models.CharField(max_length=100)
address = models.ForeignKey(Address)
subcategory = models.ForeignKey(Subcategory)
phone_number = models.BigIntegerField(max_length=20, default=0)
image = models.ImageField(blank=True, upload_to='dynamic/img/')
NO = 'NO'
YES = 'YES'
APPROVAL = ((NO, 'no'), (YES, 'yes'))
active = models.CharField(choices=APPROVAL, default=NO, max_length=3)
verified = models.CharField(choices=APPROVAL, default=NO, max_length=3)
def __unicode__(self):
return self.name
当我尝试从Admin输入Classified表时出现问题。
从这里尝试解决方案:
IntegrityError: null value in column "city_id " violates not-null constraint因为它最接近我的问题。在该链接上尝试解决方案后,我的表看起来像这样:
class Categories(models.Model):
id = models.AutoField(primary_key=True)
type = models.CharField(max_length=300, unique=True, default='All', null=True)
def __unicode__(self):
return self.type
class Subcategory(models.Model):
id = models.AutoField(primary_key=True)
parent = models.ForeignKey(Categories, null=True, blank=True, default='All')
name = models.CharField(max_length=300)
def __unicode__(self):
return self.name
class Classified(models.Model):
id = models.AutoField(primary_key=True)
name = models.CharField(max_length=256)
contact_person = models.CharField(max_length=300)
email = models.CharField(max_length=100)
address = models.ForeignKey(Address)
subcategory = models.ForeignKey(Subcategory)
phone_number = models.BigIntegerField(max_length=20, default=0)
image = models.ImageField(blank=True, upload_to='dynamic/img/')
NO = 'NO'
YES = 'YES'
APPROVAL = ((NO, 'no'), (YES, 'yes'))
active = models.CharField(choices=APPROVAL, default=NO, max_length=3)
verified = models.CharField(choices=APPROVAL, default=NO, max_length=3)
def __unicode__(self):
return self.name
但这并没有解决我的问题,现在我被困住了。
答案 0 :(得分:9)
查看您的模型,您不应在任何表格中使用字段category_id
。也许您更改了模型,但没有更改数据库中的表。现在,当您创建一个条目时,Django不会填充它不知道的字段,这会产生错误。您应该从表中删除不需要的字段。或者,如果玩具可以丢弃整个数据库并从头开始运行manage.py syncdb
。
答案 1 :(得分:0)
只需在所有字段中添加 null=True
检查 https://docs.djangoproject.com/en/3.1/topics/migrations/#postgresql