我尝试了几天才能理解这个错误：
AttibutError：'Connection'对象没有属性'_Connection__connection'
这是追溯：
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py", line 115, in get_response
response = callback(request, *callback_args, **callback_kwargs)
File "/***/****/web/gestion/views.py", line 33, in index
context_instance=RequestContext(request))
File "/usr/local/lib/python2.7/dist-packages/django/shortcuts/__init__.py", line 29, in render_to_response
return HttpResponse(loader.render_to_string(*args, **kwargs), **httpresponse_kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/template/loader.py", line 177, in render_to_string
return t.render(context_instance)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 140, in render
return self._render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 134, in _render
return self.nodelist.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 830, in render
bit = self.render_node(node, context)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 844, in render_node
return node.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/loader_tags.py", line 124, in render
return compiled_parent._render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 134, in _render
return self.nodelist.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 830, in render
bit = self.render_node(node, context)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 844, in render_node
return node.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/defaulttags.py", line 34, in render
output = self.nodelist.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 830, in render
bit = self.render_node(node, context)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 844, in render_node
return node.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/loader_tags.py", line 63, in render
result = block.nodelist.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 830, in render
bit = self.render_node(node, context)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 844, in render_node
return node.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/loader_tags.py", line 156, in render
return self.render_template(self.template, context)
File "/usr/local/lib/python2.7/dist-packages/django/template/loader_tags.py", line 138, in render_template
output = template.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 140, in render
return self._render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 134, in _render
return self.nodelist.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 830, in render
bit = self.render_node(node, context)
File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 844, in render_node
return node.render(context)
File "/usr/local/lib/python2.7/dist-packages/django/template/defaulttags.py", line 148, in render
values = list(values)
File "/usr/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 3052, in __iter__
row = self.fetchone()
File "/usr/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 3251, in fetchone
self.cursor, self.context)
File "/usr/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 1820, in _handle_dbapi_exception
self.dialect.is_disconnect(e, self.__connection, cursor)
AttributeError: 'Connection' object has no attribute '_Connection__connection'
view.py ：
def index(request):
""" Give principal information for an admin
"""
# Get all machines
liste_mac = Database().list_company_machines(1)
# Get all users
list_users = Database().list_company_users(1)
return render_to_response("gestion/index.html",
{"nom_ent": "test", "machines": liste_mac, "users": list_users},
context_instance=RequestContext(request))
模板：
{% extends "base.html" %}
{% block content %}
<div class="center">
<p style="margin-bottom: 10px;"><img src="{{ STATIC_URL }}graphic/intrinsec.png" /></p>
<div class="tab-content">
<h5> {{nom_ent}} </h5>
</div>
<div class="tab-content">
<div class="tab-pane fade in active" id="Users">
{% include "gestion/user/index.html" %} <- here i use the list_user var
</div>
<div class="tab-pane fade" id="Groups">
{% include "gestion/group/index.html" %}
</div>
<div class="tab-pane fade" id="Templates">
{% include "gestion/machine/index.html" %} <- here i use the list_mac var
</div>
</div>
</div>
{% endblock %}
settings.py ：
import os
DEBUG = True
# TEMPLATE_DEBUG = DEBUG
os.chdir("/cuckoo/web")
# Cuckoo path.
CUCKOO_PATH = os.path.join(os.getcwd(), "..")
# Database settings. We don't need it.
DATABASES = {}
SITE_ID = 1
# If you set this to False, Django will make some optimizations so as not
# to load the internationalization machinery.
USE_I18N = True
# If you set this to False, Django will not format dates, numbers and
# calendars according to the current locale.
USE_L10N = True
# Disabling time zone support and using local time for web interface and storage.
# See: https://docs.djangoproject.com/en/1.5/ref/settings/#time-zone
USE_TZ = False
TIME_ZONE = None
...
# Absolute filesystem path to the directory that will hold user-uploaded files.
# Example: "/home/media/media.lawrence.com/media/"
MEDIA_ROOT = ''
# URL that handles the media served from MEDIA_ROOT. Make sure to use a
# trailing slash.
# Examples: "http://media.lawrence.com/media/", "http://example.com/media/"
MEDIA_URL = ''
# Absolute path to the directory static files should be collected to.
# Don't put anything in this directory yourself; store your static files
# in apps' "static/" subdirectories and in STATICFILES_DIRS.
# Example: "/home/media/media.lawrence.com/static/"
STATIC_ROOT = ''
# URL prefix for static files.
# Example: "http://media.lawrence.com/static/"
STATIC_URL = '/static/'
# Additional locations of static files
STATICFILES_DIRS = (
os.path.join(os.getcwd(), 'static'),
)
CUCKOO_FILE_UPLOAD_TEMP_DIR = (
os.path.join(os.getcwd(), 'tmp_uploads'),
)
# List of finder classes that know how to find static files in
# various locations.
STATICFILES_FINDERS = (
'django.contrib.staticfiles.finders.FileSystemFinder',
'django.contrib.staticfiles.finders.AppDirectoriesFinder',
#'django.contrib.staticfiles.finders.DefaultStorageFinder',
)
# List of callables that know how to import templates from various sources.
TEMPLATE_LOADERS = (
'django.template.loaders.filesystem.Loader',
'django.template.loaders.app_directories.Loader',
#'django.template.loaders.eggs.Loader',
)
MIDDLEWARE_CLASSES = (
'django.middleware.common.CommonMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
# Cuckoo headers.
"web.headers.CuckooHeaders",
)
FILE_UPLOAD_HANDLERS = (
'web.upload.CuckooTemporaryFileUploadHandler',
)
ROOT_URLCONF = 'web.urls'
# Python dotted path to the WSGI application used by Django's runserver.
WSGI_APPLICATION = 'web.wsgi.application'
TEMPLATE_DIRS = (
"templates"
)
INSTALLED_APPS = (
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
#'django.contrib.sites',
#'django.contrib.messages',
'django.contrib.staticfiles',
# Uncomment the next line to enable the admin:
# 'django.contrib.admin',
# Uncomment the next line to enable admin documentation:
# 'django.contrib.admindocs',
#'debug_toolbar',
'gestion',
'authentication'
)
LOGIN_REDIRECT_URL = "/"
# A sample logging configuration. The only tangible logging
# performed by this configuration is to send an email to
# the site admins on every HTTP 500 error when DEBUG=False.
# See http://docs.djangoproject.com/en/dev/topics/logging for
# more details on how to customize your logging configuration.
LOGGING = {
'version': 1,
'disable_existing_loggers': False,
'filters': {
'require_debug_false': {
'()': 'django.utils.log.RequireDebugFalse'
}
},
'handlers': {
'mail_admins': {
'level': 'ERROR',
'filters': ['require_debug_false'],
'class': 'django.utils.log.AdminEmailHandler'
}
},
'loggers': {
'django.request': {
'handlers': ['mail_admins'],
'level': 'ERROR',
'propagate': True,
},
}
}
# Hack to import local settings.
try:
LOCAL_SETTINGS
except NameError:
try:
from local_settings import *
except ImportError:
pass
使用debug pdb工具测试时，两个函数（list_company_machines，list_company_users）都有效。但当我一步一步地在视图的最后一条指令上设置断点时，它会向我发送错误：/
Django告诉我错误是从view.py返回索引，但我不明白为什么？
此外，我没有在traceback中修改文件中的任何内容（base.py，...）！
感谢您的建议。
EvrardD
编辑：
借口我忘了给出在DB中获取数据的2个函数：
def list_company_machines(self, id_company=1):
"""Lists virtual machines.
:param id_company:
:return: list of virtual machines
"""
#pdb.set_trace()
engine = self.engine.connect()
machines = engine.execute(text("SELECT m.* FROM machines m, machines_companies x WHERE m.id = x.machines_id AND x.companies_id = {}".format(id_company)))
engine.close()
return machines
和
def list_company_users(self, id_company=1):
"""List all info about every user in a specifique company
:param id_company: id of the company
"""
engine = self.engine.connect()
user = engine.execute(text("SELECT * FROM users WHERE company_id == {}".format(id_company)))
engine.close()
return user