我试图在Django 1.4中进行注册页面。
这些是我的文件：
view.py
mensaje = ""
if request.method == 'POST':
form = RegistrationForm(request.POST)
if form.is_valid():
usr = User.objects.create_user(username = form.cleaned_data['username'], email = form.cleaned_data['mail'], password = form.cleaned_data['pa$
cli = cliente(user=usr, nombre=form.cleaned_data['nombre'], apellidos = form.cleaned_data['apellidos'], empresa = form.cleaned_data['empresa$
mensaje = "Cliente %s guardado exitosamente con el username %s" % (cli.nombre,cli.user)
cli.save()
ctx = {'mensaje':mensaje}
return HttpResponseRedirect('/')
else:
mensaje = "el formulario no es valido"
ctx = {'form': form, 'mensaje': mensaje}
return render_to_response('pymes/register.html', ctx, context_instance=RequestContext(request))
else:
form = RegistrationForm()
context = {'form':form}
return render_to_response('pymes/register.html', context, context_instance=RequestContext(request))
models.py
class perfilCliente(models.base.ModelBase):
def _prepare(self):
super(perfilCliente, self)._prepare()
def create_cliente_user_callback(sender, instance, created, **kwargs):
if created:
self.objects.create(user=instance)
post_save.connect(create_cliente_user_callback, sender=User, weak=False)
class cliente(models.Model):
__metaclass__ = perfilCliente
user = models.OneToOneField(User)
nombre = models.CharField(max_length=200)
apellidos = models.CharField(max_length=200)
mail = models.CharField(max_length=200)
empresa = models.CharField(max_length=200)
status = models.BooleanField(default=True)
plan = models.ForeignKey('pymes.plan',null=True,blank=True)
def __unicode__(self):
nombreCompleto = "%s %s"%(self.nombre,self.apellidos)
return nombreCompleto
register.html
{% extends "base.html" %}
{% block title %} Login {% endblock %}
{% block content %}
{{ mensaje }}
<form action="" method="post">
{% csrf_token %}
{% if form.errors %}<p> Corregir los campos: </p> {% endif %}
<div class="register_div">
{% if form.nombre.errors %}<p class="error">{{ form.nombre.errors }}</p>{% endif %}
<p><label for="nombre"{% if form.nombre.errors %} class="error"{% endif %}>Nombre:</label>{{ form.nombre }}</p>
</div>
<div class="register_div">
{% if form.apellido.errors %}<p class="error">{{ form.apellido.errors }}</p>{% endif %}
<p><label for="apellido"{% if form.apellido.errors %} class="error"{% endif %}>Apellido:</label>{{ form.apellidos }}</p>
</div>
<div class="register_div">
{% if form.empresa.errors %}<p class="error">{{ form.empresa.errors }}</p>{% endif %}
<p><label for="empresa"{% if form.empresa.errors %} class="error"{% endif %}>Empresa:</label> {{ form.empresa }}</p>
</div>
<div class="register_div">
{% if form.mail.errors %}<p class="error">{{ form.mail.errors }}</p>{% endif %}
<p><label for="mail"{% if form.mail.errors %} class="error"{% endif %}>Email:</label> {{ form.mail }}</p>
</div>
<div class="register_div">
{% if form.username.errors %} <p class="error">{{ form.username.errors }}</p>{% endif %}
<p><label for="username"{% if form.username.errors %} class="error"{% endif %}>Username:</label> {{ form.username }}</p>
</div>
<div class="register_div">
{% if form.password.errors %}<p class="error">{{ form.password.errors }}</p>{% endif %}
<p><label for="password"{% if form.password.errors %} class="error"{% endif %}>Password:</label> {{ form.password }}</p>
</div>
<div class="register_div">
{% if form.passworduno.errors %}<p class="error">{{ form.passworduno.errors }}</p>{% endif %}
<p><label for="password1"{% if form.passworduno.errors %} class="error"{% endif %}>Verify Password:</label>{{ form.passworduno }}</p>
</div>
<p><input type="submit" alt="register" /></p>
</form>
页面工作正常但是，当发送表单时显示此错误：
Request Method: POST
Request URL: http://192.168.2.106:8000/register/
Django Version: 1.4.5
Python Version: 2.7.3
Installed Applications:
('django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.sites',
'django.contrib.messages',
'django.contrib.staticfiles',
'django.contrib.admin',
'saas.apps.pymes',
'django.contrib.admindocs')
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 "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py" in get_response
111. response = callback(request, *callback_args, **callback_kwargs)
File "/root/project/saas/saas/apps/pymes/views.py" in register_view
52. cli.save()
File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py" in save
463. self.save_base(using=using, force_insert=force_insert, force_update=force_update)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py" in save_base
551. result = manager._insert([self], fields=fields, return_id=update_pk, using=using, raw=raw)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/manager.py" in _insert
203. return insert_query(self.model, objs, fields, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py" in insert_query
1593. return query.get_compiler(using=using).execute_sql(return_id)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/sql/compiler.py" in execute_sql
912. cursor.execute(sql, params)
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/util.py" in execute
40. return self.cursor.execute(sql, params)
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/mysql/base.py" in execute
114. return self.cursor.execute(query, args)
File "/usr/lib/python2.7/dist-packages/MySQLdb/cursors.py" in execute
174. self.errorhandler(self, exc, value)
File "/usr/lib/python2.7/dist-packages/MySQLdb/connections.py" in defaulterrorhandler
36. raise errorclass, errorvalue
Exception Type: IntegrityError at /register/
Exception Value: (1062, "Duplicate entry '3' for key 'user_id'"
这会在id = 3
的数据库中正确创建新用户mysql> select * from auth_user;
+----+-----------+------------+-----------+--------------------+----------+----------+-----------+--------------+---------------------+---------------------+
| id | username | first_name | last_name | email | password | is_staff | is_active | is_superuser | last_login | date_joined |
+----+-----------+------------+-----------+--------------------+-------------------------------------------------------------------------------+----------+-----------+--------------+---------------------+---------------------+
| 1 | root | | | sdfds@sdfa.com | pass1 | 1 | 1 | 1 | 2013-04-01 07:49:58 | 2013-04-01 07:49:58 |
| 2 | oespinoza | | | zdssd@yahoo.es | pass2 | 0 | 1 | 0 | 2013-04-01 07:50:46 | 2013-04-01 07:50:46 |
| 3 | loco | | | sdfsd | pass3 | 0 | 1 | 0 | 2013-04-01 08:03:37 | 2013-04-01 08:03:37 |
+----+-----------+------------+-----------+--------------------+---------+----------+-----------+--------------+---------------------+---------------------+
现实情况也很好。但是，在表格＆＃34; cliente＆＃34;只显示这个：
mysql> select * from pymes_cliente;
+----+---------+--------+-----------+------+---------+--------+---------+
| id | user_id | nombre | apellidos | mail | empresa | status | plan_id |
+----+---------+--------+-----------+------+---------+--------+---------+
| 1 | 1 | | | | | 1 | NULL |
| 2 | 2 | | | | | 1 | NULL |
| 4 | 3 | | | | | 1 | NULL |
+----+---------+--------+-----------+------+---------+--------+---------+
请帮帮我。
答案 0 :(得分：3)
您似乎为每次注册创建了Profile对象的2个实例：视图中的第一个，以及信号中的第二个。
# Create & save User object
usr = User.objects.create_user(...)
...
# Create profile
cli = cliente(user=usr, ...)
# Save profile & fire your signal
cli.save()
在你的信号中
# Creates second profile with same user object, causing error
self.objects.create(user=instance)
删除信号（以及_prepare），问题应该消失。
旁注：我不确定您为什么要在_prepare方法中注册信号。通常最好在模型文件的底部注册任何信号：
class Client(models.Model):
...
def create_cliente_user_callback(sender, instance, created, **kwargs):
...
post_save.connect(create_cliente_user_callback, sender=User, weak=False)