Django '키 (필드) =() 중복되었습니다'

Question

이 질문은 here 전에 물어 보았습니다.

저는 Django/Wagtail 프로젝트에서 작업 중입니다. 어떤 시점에서 모델을 수정하고 일부 필드를 추가해야했습니다.

실수로 나는 새로운 분야에 대한 진정한 고유의 플래그를 = 포함되어 있습니다. 이 방법 : 마이그레이션을하고 마이그레이션 할 때

title = models.CharField(max_length=100, unique=True, blank=True, null=True, verbose_name=_('Category Title')) 

, 그것은이 문제를 외쳤다 : 내가 실수를 깨달았 그리고

는 = true라고 독특한 제거하고 이런 식으로 왼쪽 :

마이그레이션을 수행하고 다시 문제가 사라질 것으로 예상됩니다. 그러나 나는 같은 문제가있다.

어떻게 해결할 수 있습니까?

class Migration(migrations.Migration): 

    dependencies = [ 
     ('distributed', '0029_remove_blogcategory_title'), 
    ] 

    operations = [ 
     migrations.AddField(
      model_name='blogcategory', 
      name='title', 
      field=models.CharField(blank=True, max_length=100, null=True, verbose_name='Category Title'), 
     ), 
    ] 

그리고 이것은 추적입니다 :

이 지난 마이그레이션입니다

Microsoft Windows [Versión 6.1.7600] 
Copyright (c) 2009 Microsoft Corporation. Reservados todos los derechos. 

C:\Windows\system32>cd C:/ 

C:\>cd distributed 

C:\distributed>cd distributed 

C:\distributed\distributed>python manage.py runserver 
Performing system checks... 

System check identified no issues (0 silenced). 

You have 6 unapplied migration(s). Your project may not work properly until you 
apply the migrations for app(s): distributed. 
Run 'python manage.py migrate' to apply them. 
April 26, 2017 - 12:40:45 
Django version 1.10.7, using settings 'genesis.settings.dev' 
Starting development server at http://127.0.0.1:8000/ 
Quit the server with CTRL-BREAK. 
^C 
C:\distributed\distributed>python manage.py migrate 
Operations to perform: 
    Apply all migrations: admin, auth, contenttypes, distributed, otp_static, otp_ 
totp, otp_yubikey, sessions, sites, taggit, two_factor, wagtailadmin, wagtailcor 
e, wagtaildocs, wagtailembeds, wagtailforms, wagtailimages, wagtailredirects, wa 
gtailsearch, wagtailusers 
Running migrations: 
    Applying distributed.0025_auto_20170425_1827...Traceback (most recent call las 
t): 
    File "manage.py", line 11, 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 11 
5, in migrate 
    state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_i 
nitial=fake_initial) 
    File "C:\Python27\lib\site-packages\django\db\migrations\executor.py", line 14 
5, 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 24 
4, in apply_migration 
    state = migration.apply(state, schema_editor) 
    File "C:\Python27\lib\site-packages\django\db\migrations\migration.py", line 1 
29, in apply 
    operation.database_forwards(self.app_label, schema_editor, old_state, projec 
t_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\postgresql\schema.py", 
line 21, in add_field 
    super(DatabaseSchemaEditor, self).add_field(model, field) 
    File "C:\Python27\lib\site-packages\django\db\backends\base\schema.py", line 4 
09, in add_field 
    self.execute(sql, params) 
    File "C:\Python27\lib\site-packages\django\db\backends\base\schema.py", line 1 
12, 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\cachalot\monkey_patch.py", line 111, in in 
ner 
    out = original(cursor, sql, *args, **kwargs) 
    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) 
django.db.utils.IntegrityError: could not create unique index "distributed_blogc 
ategory_title_key" 
DETAIL: Key (title)=() is duplicated. 


C:\distributed\distributed> 

Answer 1

역 추적 당신이 마이그레이션에게 0025.

을 실행하려고 할 때이 오류가 발생한다는 이야기

python manage.py showmigrations의 출력은 마이 그 레이션 0025-0030이 적용되지 않았 음을 알려줍니다.

[X] 0022_auto_20170109_1620 
[X] 0023_auto_20170109_1621 
[X] 0024_auto_20170112_1933 
[ ] 0025_auto_20170425_1827 
[ ] 0026_auto_20170425_1829 
[ ] 0027_auto_20170425_1839 
[ ] 0028_auto_20170425_1840 
[ ] 0029_remove_blogcategory_title 
[ ] 0030_blogcategory_title 

따라서는 (당신이 안전성을 위해 백업 할 수 있습니다) 이러한 마이그레이션을 삭제하는 것이 안전해야한다. makemigrations 및 migrate을 다시 실행하여 새 마이그레이션을 다시 작성하고 실행할 수 있습니다.