ORA-01861: 在 django 中执行获取模型对象时文字与格式字符串不匹配

Posted 2023-03-15

【中文标题】ORA-01861: 在 django 中执行获取模型对象时文字与格式字符串不匹配

【英文标题】：ORA-01861: literal does not match format string when executing get model object in django

【发布时间】：2015-03-10 21:18:34

【问题描述】：

我在 django 中有一个模型对象，就像这样......

from django.db import models

class Person(models.Model):
     employee_title = models.CharField(max_length=150)
     pk_person_id = models.IntegerField(primary_key=True)
     department_name = models.CharField(max_length=240)
     cost_center = models.CharField(max_length=150)
     user_name = models.CharField(max_length=100)

def __str__(self):
    return self.user_name

class Meta:
    managed = False
    db_table = 'company_hr_idm_data_v'

在我看来，我正在像这样对 Person 对象进行简单的获取...

testobj = Person.objects.using('oracle').get(pk=4)

代码错误并带有DatabaseError，上面写着

ORA-01861: 文字与格式字符串不匹配

这是我在 settings.py 中将调试模式设置为 true 时编写的堆栈跟踪

Environment:


Request Method: GET
Request URL: http://127.0.0.1:8000/roles/testing

Django Version: 1.7.2
Python Version: 2.7.6
Installed Applications:
('django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'roles')
Installed Middleware:
('django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware')


Traceback:
File "/Users/adjeibad/.virtualenvs/wwtmlserver/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
  111.                     response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/Users/adjeibad/.virtualenvs/wwtmlserver/entitlements/roles/views/Organization.py" in test
  9.     testobj = Person.objects.using('oracle').get(pk=4)
File "/Users/adjeibad/.virtualenvs/wwtmlserver/lib/python2.7/site-    packages/django/db/models/query.py" in get
  351.         num = len(clone)
File "/Users/adjeibad/.virtualenvs/wwtmlserver/lib/python2.7/site-packages/django/db/models/query.py" in __len__
  122.         self._fetch_all()
File "/Users/adjeibad/.virtualenvs/wwtmlserver/lib/python2.7/site-packages/django/db/models/query.py" in _fetch_all
  966.             self._result_cache = list(self.iterator())
File "/Users/adjeibad/.virtualenvs/wwtmlserver/lib/python2.7/site-packages/django/db/models/query.py" in iterator
  265.         for row in compiler.results_iter():
File "/Users/adjeibad/.virtualenvs/wwtmlserver/lib/python2.7/site-packages/django/db/models/sql/compiler.py" in results_iter
  700.         for rows in self.execute_sql(MULTI):
File "/Users/adjeibad/.virtualenvs/wwtmlserver/lib/python2.7/site-packages/django/db/models/sql/compiler.py" in execute_sql
  786.             cursor.execute(sql, params)
File "/Users/adjeibad/.virtualenvs/wwtmlserver/lib/python2.7/site-packages/django/db/backends/utils.py" in execute
  81.             return super(CursorDebugWrapper, self).execute(sql, params)
File "/Users/adjeibad/.virtualenvs/wwtmlserver/lib/python2.7/site-packages/django/db/backends/utils.py" in execute
  65.                 return self.cursor.execute(sql, params)
    File "/Users/adjeibad/.virtualenvs/wwtmlserver/lib/python2.7/site-packages/django/db/utils.py"     in __exit__
  94.                 six.reraise(dj_exc_type, dj_exc_value, traceback)
File "/Users/adjeibad/.virtualenvs/wwtmlserver/lib/python2.7/site-packages/django/db/backends/utils.py"     in execute
65.                 return self.cursor.execute(sql, params)
File "/Users/adjeibad/.virtualenvs/wwtmlserver/lib/python2.7/site-                    packages/django/db/backends/oracle/base.py" in execute
  916.             return self.cursor.execute(query, self._param_generator(params))

Exception Type: DatabaseError at /roles/testing
Exception Value: ORA-01861: literal does not match format string

哦！这里也是生成的查询...

SELECT * FROM (SELECT ROWNUM AS "_RN", "_SUB".* FROM (SELECT "COMPANY_HR_IDM_DATA_V"."EMPLOYEE_TITLE", "COMPANY_HR_IDM_DATA_V"."PK_PERSON_ID", "COMPANY_HR_IDM_DATA_V"."DEPARTMENT_NAME", "COMPANY_HR_IDM_DATA_V"."COST_CENTER", "COMPANY_HR_IDM_DATA_V"."USER_NAME" FROM "COMPANY_HR_IDM_DATA_V" WHERE "COMPANY_HR_IDM_DATA_V"."PK_PERSON_ID" = :arg0) "_SUB" WHERE ROWNUM <= 21) WHERE "_RN" > 0

我试图提供尽可能多的信息，谁能引导我朝着正确的方向前进？

【问题讨论】：

在我检索对象之前需要执行的语句吗？票说他们在处理日期时遇到了问题。我没有访问日期信息。我确实注意到 django 会运行​​他们在应用启动时提到的这两个查询。

你说得对，看起来这张票实际上并不相关。尽管it's possible this is a bug in Django，但我已删除该评论以防止将来出现混淆。

可能是db中的表已经创建，而不是模型同步

表已经创建。我要做的就是从中读取数据。我已经尝试为数据库上的另一个表创建一个模型，它工作得很好。当我尝试访问 company_hr_idm_data_v 时，它给了我该错误，并且我使用的 db 用户具有完全访问权限

那么可能表列 pk_person_id 是为字符串或其他东西而不是整数创建的，所以当传递 pk=4 时，它是整数，但预期是字符串

【参考方案1】：

您可以尝试通过输入直接执行查询吗？输入和实际列类型之间可能存在数据类型差异。