5

我有以下代码：

设置.py

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql', 
        'NAME': 'tectcom',                     
        'USER': 'test',                    
        'PASSWORD': '***146***',                 
        'HOST': '',                     
        'PORT': '',                      
    },

    'cdr': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'ast',                     
        'USER': '123',                      
        'PASSWORD': '654',                 
        'HOST': '',                      
        'PORT': '',                     
    }

视图.py

def cdr_user(request):
        cursor = connections['cdr'].cursor()
        calls = cursor.execute('SELECT * FROM cdr')
        return render_to_response("cdr_user.html",
                {'result':calls }, context_instance=RequestContext(request))

cdr_user.html

{% for res in result %}

{{ res.billsec }}<br />

{% endfor %}

表是这样的：

+-------------+--------------+------+-----+---------------------+-------+
| Field       | Type         | Null | Key | Default             | Extra |
+-------------+--------------+------+-----+---------------------+-------+
| calldate    | datetime     | NO   | MUL | 0000-00-00 00:00:00 |       | 
| clid        | varchar(80)  | NO   |     |                     |       | 
| src         | varchar(80)  | NO   |     |                     |       | 
| dst         | varchar(80)  | NO   | MUL |                     |       | 
| dcontext    | varchar(80)  | NO   |     |                     |       | 
| channel     | varchar(80)  | NO   |     |                     |       | 
| dstchannel  | varchar(80)  | NO   |     |                     |       | 
| lastapp     | varchar(80)  | NO   |     |                     |       | 
| lastdata    | varchar(80)  | NO   |     |                     |       | 
| duration    | int(11)      | NO   |     | 0                   |       | 
| billsec     | int(11)      | NO   |     | 0                   |       | 
| disposition | varchar(45)  | NO   |     |                     |       | 
| amaflags    | int(11)      | NO   |     | 0                   |       | 
| accountcode | varchar(20)  | NO   | MUL |                     |       | 
| userfield   | varchar(255) | NO   |     |                     |       | 
| uniqueid    | varchar(32)  | NO   |     |                     |       | 
| linkedid    | varchar(32)  | NO   |     |                     |       | 
| sequence    | varchar(32)  | NO   |     |                     |       | 
| peeraccount | varchar(32)  | NO   |     |                     |       | 
+-------------+--------------+------+-----+---------------------+-------+

问题是我得到一个“异常值：'long'对象不可迭代”

TypeError at /cdr_user/
'long' object is not iterable
Request Method: GET
Request URL:    http://localhost:8000/cdr_user/
Django Version: 1.4.1
Exception Type: TypeError
Exception Value:    
'long' object is not iterable
Exception Location: /usr/local/lib/python2.7/site-packages/django/template/defaulttags.py in render, line 144
Python Executable:  /usr/local/bin/python
Python Version: 2.7.0
Python Path:    
['/home/tectadmin/cdr/billing',
 '/usr/local/lib/python2.7/site-packages/setuptools-0.6c11-py2.7.egg',
 '/usr/local/lib/python2.7/site-packages/pip-1.0-py2.7.egg',
 '/usr/local/lib/python2.7/site-packages/django_endless_pagination-1.1-py2.7.egg',
 '/usr/local/lib/python27.zip',
 '/usr/local/lib/python2.7',
 '/usr/local/lib/python2.7/plat-linux2',
 '/usr/local/lib/python2.7/lib-tk',
 '/usr/local/lib/python2.7/lib-old',
 '/usr/local/lib/python2.7/lib-dynload',
 '/usr/local/lib/python2.7/site-packages']
Server time:    Sab, 1 Set 2012 19:56:10 -0300
Error during template rendering

In template /home/tectadmin/cdr/billing/config/templates/cdr_user.html, error at line 21
'long' object is not iterable
11    text-indent: 6em;
12  }
13  </style>
14  {% extends "index_cliente.html" %}
15  {% load endless %}
16  {% block title %}CDR{% endblock %}
17  {% block content %}
18  
19  
20  
21  {% for res in result %}
22  
23  {{ res.billsec }}<br />
24  
25  {% endfor %}
26  
27  
28  
29  
30  <br />
31  <form name="input" action="/user_cdr/" method="et" >
Traceback Switch to copy-and-paste view

/usr/local/lib/python2.7/site-packages/django/core/handlers/base.py in get_response
                        response = callback(request, *callback_args, **callback_kwargs) ...
▶ Local vars
/home/tectadmin/cdr/billing/config/views.py in cdr_user
                {'result':result }, context_instance=RequestContext(request)) ...
▶ Local vars

如何使结果可迭代以在我的模板中显示？我已经看过https://docs.djangoproject.com/en/dev/topics/db/sql/ 以及其他文档，但我仍然迷失在代码中。

谢谢你。

4

2 回答 2

3

要在 Python 中迭代 SQL 查询的结果，请使用cursor.fetchall()将其转换为列表列表。这里有一个非常方便的方法可以将这些结果转换为您可以轻松访问的对象：

class SQLRow(object):
    def __init__(self, cursor, row):
        for (attr, val) in zip((d[0] for d in cursor.description), row) :
            setattr(self, attr, val)

一旦你有了那个类，这很简单：

def cdr_user(request):
    cursor = connections['cdr'].cursor()
    calls = cursor.execute('SELECT * FROM cdr')
    result = [SQLRow(cursor, r) for r in cursor.fetchall()]
    return render_to_response("cdr_user.html",
            {'result': result }, context_instance=RequestContext(request))

这样，该billsec属性（和所有其他属性）仍然可以在您的模板中访问。

于 2012-09-02T00:18:07.243 回答
2

cursor.execute()不返回可迭代的。它在原地修改光标对象。这是有关此的一些文档。

您需要调用.fetchone() .fetchmany()或.fetchall()检索结果，这些结果应该是可迭代的，例如：

def cdr_user(request):
  cursor = connections['cdr'].cursor()
  cursor.execute('SELECT * FROM cdr')
  calls = cursor.fetchall()
  return render_to_response("cdr_user.html",
                            {'result':calls }, 
                            context_instance=RequestContext(request))
于 2012-09-02T00:20:38.067 回答