Jython zxJDBC / Python cx_oracle 调用 oracle 存储过程时参数数量或类型错误

Question

尝试制作一个 django 测试应用程序，它将使用存储的 Oracle 过程来插入/获取数据。

将 jython 与 zxJDBC 一起使用，但同样的错误也适用于 python 和 cx_oracle。

这里是一些代码片段：

models.py

from django.db import models
from django.db import connection

class ALEX_TEST_PKG():
    def get_data(self, inparam1):
        cursor = connection.cursor()
        ret = cursor.callproc("ALEX_TEST_PKG.test0", inparam1)
        cursor.close
        return ret

views.py

class TestForm(forms.Form):
    inparam1 = forms.CharField(max_length=500)


def message(request):
    if request.method == 'POST':
        form = TestForm(request.POST)
    else:
        form = TestForm()
    if form.is_valid():
        my_util = ALEX_TEST_PKG()
        ret = my_util.get_data(request.POST['inparam1'])
        return HttpResponse(ret)
    return render_to_response('form.html', {'form':form}, context_instance=RequestContext(request))

oracle 的程序：

CREATE OR REPLACE PACKAGE BODY ALEX.alex_test_pkg
IS
   PROCEDURE test0 (inparam1 IN integer)
   IS
   BEGIN
      insert into alex_debug(col1) values(inparam1); 
   END test0;
END alex_test_pkg;
/

Django 错误日志：

Environment:


Request Method: POST
Request URL: http://localhost:8000/form/

Django Version: 1.3.1
Python Version: 2.7.0
Installed Applications:
['django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.sites',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'django.contrib.admin',
 'dbtest']
Installed Middleware:
('django.middleware.common.CommonMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware')


Traceback:
File "C:\Python27\lib\site-packages\django-1.3.1-py2.7.egg\django\core\handlers\base.py" in get_response
  111.                         response = callback(request, *callback_args, **callback_kwargs)
File "E:\WatchTower\workspace3\erwtwe\erwtwe\dbtest\views.py" in message
  19.         ret = my_util.get_data(request.POST['inparam1'])
File "E:\WatchTower\workspace3\erwtwe\erwtwe\dbtest\models.py" in get_data
  7.         ret = cursor.callproc("ALEX_TEST_PKG.test0", inparam1)

Exception Type: DatabaseError at /form/
Exception Value: ORA-06550: line 1, column 7:
PLS-00306: wrong number or types of arguments in call to 'TEST0'
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored

任何帮助都会被采纳。我已经为此伤透了三天了。

Answer 1

您正在从 request.POST 传递值，该值始终是一个字符串，但您的存储过程需要一个整数。

请改用 form.cleaned_data['inparam1'] - 表单会将其转换为正确的类型，即整数。

Answer 2

callproc 的参数预计通过列表传入。您似乎正在传递一个字符串。我的即兴猜测是 Django 或 cx_Oracle 正在将该字符串解释为序列并将一整串 1 字符字符串传递给 Oracle。

将 [inparam1] 而不是仅将 inparam1 传递给cursor.callproc。