Django'user_id'鍵重複輸入'2'

Question

我試圖在Django 1.4中做註冊頁面。

這些都是我的文件：

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> 

的頁面工作正常，但當發送表單顯示m E該錯誤：

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'" 

這正確地創建一個新的用戶數據庫使用id = 3

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 | 
+----+-----------+------------+-----------+--------------------+---------+----------+-----------+--------------+---------------------+---------------------+ 

而且realtionship正常工作了。但是，在表「客戶」只顯示此：

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 | 
+----+---------+--------+-----------+------+---------+--------+---------+ 

請幫助我。

Answer 1

它看起來像你正在爲每個註冊創建你的Profile對象的2個實例：第一個在你的視圖中，第二個通過你的信號。

# Create & save User object 
usr = User.objects.create_user(...) 
... 
# Create profile 
cli = cliente(user=usr, ...) 
# Save profile & fire your signal 
cli.save() 

在你的信號

# Creates second profile with same user object, causing error 
self.objects.create(user=instance) 

刪除信號（和_prepare）和問題應該消失。

旁註：我不知道你爲什麼註冊你的信號在_prepare方法。通常最好在模型文件底部註冊任何信號：

class Client(models.Model): 
    ... 

def create_cliente_user_callback(sender, instance, created, **kwargs): 
    ... 
post_save.connect(create_cliente_user_callback, sender=User, weak=False)