django eindeutige Einschränkung fehlgeschlagen User_id

Question

django eindeutige Einschränkung salebook_saleman.user_id fehlgeschlagen

model.py:

class Saleman(models.Model): 
    name = models.CharField(max_length=200) 
    password = models.CharField(max_length=200) 

    def __str__(self):    
     return self.name 

class Book(models.Model): 
    owner = models.ForeignKey(Saleman) 
    book_name = models.CharField(max_length=200) 
    book_text = models.TextField(max_length=2000,blank=True) 
    price = models.IntegerField(default=0) 
    telephone = models.CharField(max_length=200) 
    #image = models.ImageField(upload_to='photos') 
    pub_date = models.DateTimeField('date published',default = timezone.now) 

    def __str__(self): 
     return self.book_name 

view.py:

def user_register(request): 
    if request.method == 'POST': 
     username = request.POST['username'] 
     password = request.POST['password'] 
     email = request.POST['email'] 
     new_user = User.objects.create_user(username,email,password) 
     new_saleman = Saleman.objects.create(name=username,password=password) 
     if newsaleman is not None: 
      new_saleman.save() 
     if new_user is not None: 
      new_user.save() 
      context = {'Username':username} 
      return render(request,"salebook/index.html",context) 
    else: 
     context = {'error_message':'Register Fail'} 
     return render(request,"salebook/register.html",context) 


def user_login(request): 
if request.method == 'POST': 
    username = request.POST['username'] 
    password = request.POST['password'] 
    user = authenticate(username=username, password=password) 
    if user is not None: 
     if user.is_active: 
      login(request, user) 
      context = {'Username':username} 
      return render(request,"salebook/index.html",context) 
     else: 
      context = {'error_message':'User is locked'} 
      return render(request,"salebook/login.html",context) 
    else: 
     context = {'error_message':'Null User or Wrong Password'} 
     return render(request,"salebook/login.html",context) 
else: 
    return render_to_response('salebook/login.html') 

Nicht wirklich sicher, was es bedeutet, oder was verursacht es. Lassen Sie mich wissen, ob es eine einfache Lösung gibt. Vielen Dank! Update: Der Fehler ist:

File "manage.py", line 22, in <module> 
execute_from_command_line(sys.argv) 
File "C:\Python27\lib\site-packages\django\core\management\__init__.py", line 367, in execute_from_command_line 
utility.execute() 
File "C:\Python27\lib\site-packages\django\core\management\__init__.py", line 359, in execute 
self.fetch_command(subcommand).run_from_argv(self.argv) 
File "C:\Python27\lib\site-packages\django\core\management\base.py", line 294, in run_from_argv 
self.execute(*args, **cmd_options) 
File "C:\Python27\lib\site-packages\django\core\management\base.py", line 345, in execute 
output = self.handle(*args, **options) 
File "C:\Python27\lib\site-packages\django\core\management\commands\migrate.py", line 204, in handle 
fake_initial=fake_initial, 
File "C:\Python27\lib\site-packages\django\db\migrations\executor.py", line 115, in migrate 
state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial) 
File "C:\Python27\lib\site-packages\django\db\migrations\executor.py", line 145, in _migrate_all_forwards 
state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial) 
File "C:\Python27\lib\site-packages\django\db\migrations\executor.py", line 244, in apply_migration 
state = migration.apply(state, schema_editor) 
File "C:\Python27\lib\site-packages\django\db\migrations\migration.py", line 129, in apply 
operation.database_forwards(self.app_label, schema_editor, old_state, project_state) 
File "C:\Python27\lib\site-packages\django\db\migrations\operations\fields.py", line 84, in database_forwards 
field, 
File "C:\Python27\lib\site-packages\django\db\backends\sqlite3\schema.py", line 231, in add_field 
self._remake_table(model, create_fields=[field]) 
File "C:\Python27\lib\site-packages\django\db\backends\sqlite3\schema.py", line 199, in _remake_table 
self.quote_name(model._meta.db_table), 
File "C:\Python27\lib\site-packages\django\db\backends\base\schema.py", line 112, in execute 
cursor.execute(sql, params) 
File "C:\Python27\lib\site-packages\django\db\backends\utils.py", line 79, in execute 
return super(CursorDebugWrapper, self).execute(sql, params) 
File "C:\Python27\lib\site-packages\django\db\backends\utils.py", line 64, in execute 
return self.cursor.execute(sql, params) 
File "C:\Python27\lib\site-packages\django\db\utils.py", line 94, in __exit__ 
six.reraise(dj_exc_type, dj_exc_value, traceback) 
File "C:\Python27\lib\site-packages\django\db\backends\utils.py", line 64, in execute 
return self.cursor.execute(sql, params) 
File "C:\Python27\lib\site-packages\django\db\backends\sqlite3\base.py", line 337, in execute 
return Database.Cursor.execute(self, query, params) 
django.db.utils.IntegrityError: UNIQUE constraint failed:salebook_saleman.user_id 

auf den ersten ich versuche, mein Modell saleman zu erweitern, indem abstractUser verwenden, und dieser Fehler happen.When ich meinen Code wiederholen, ist es noch alive.Sorry, ich weiß nicht, Was ist mit meinem Code passiert?

Answer 1

Es sieht so aus, als ob Ihr Saleman-Modell einen Fremdschlüssel oder ein Eins-zu-Eins-Feld für das Benutzermodell verwendet hat. Sie müssen eine neue Migration erstellen und dann ausführen, um das Feld aus der Datenbank zu entfernen.

./manage.py makemigrations salebook 
./manage.py migrate 

Answer 2

es scheint, wie Sie ein ‚_‘ hier verloren haben:

if newsaleman is not None: 
     new_saleman.save()