ジャンゴユニーク制約が

Question

ジャンゴユニーク制約をuser_idの失敗

model.py salebook_saleman.user_id失敗しました：

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') 

、それが何を意味するかまたは引き起こして本当にわからないがそれ。 簡単な修正がある場合はお知らせください。ありがとう！ 更新： エラーは次のとおりです。

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 

最初はそれはまだalive.Sorry、私はabstractUserを使用して、私のモデルsalemanを拡張しようとすると、このエラー私は私のコードをやり直すhappen.When、私は知りません私のコードに何が起こったのですか？

Answer 1

Salemanモデルでは、ユーザーモデルに外部キーまたは一対一フィールドを使用していたようです。新しい移行を作成し、それを実行してデータベースからフィールドを削除する必要があります。

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

Answer 2

それはあなたが失ってしまったように思える「_」ここ：

if newsaleman is not None: 
     new_saleman.save()