Django:不存在ProgrammingError关系 [英] Django: ProgrammingError relation does not exists

问题描述

要在 heroku 上设置新数据库，我尝试了 python manage migration ，并得到了许多与关系已经存在/不存在相关的异常.因此，我按照此处的说明 django 1.9:ProgrammingError:关联"users_user"不存在，但不起作用.

To setup new database on heroku I tried python manage migrate and got many exceptions related to relation already exists/does not exists. So I followed the instructions here django 1.9: ProgrammingError: relation "users_user" does not exist but it didn't work.

~ $ django-admin showmigrations
admin
 [ ] 0001_initial
 [ ] 0002_logentry_remove_auto_add
auth
 [ ] 0001_initial
 [ ] 0002_alter_permission_name_max_length
 [ ] 0003_alter_user_email_max_length
 [ ] 0004_alter_user_username_opts
 [ ] 0005_alter_user_last_login_null
 [ ] 0006_require_contenttypes_0002
 [ ] 0007_alter_validators_add_error_messages
 [ ] 0008_alter_user_username_max_length
contenttypes
 [ ] 0001_initial
 [ ] 0002_remove_content_type_name
dashboard
 [ ] 0001_squashed_0024_auto_20161205_2214 (24 squashed migrations)
sessions
 [ ] 0001_initial

当我运行 migrate

~ $ python manage.py migrate
Operations to perform:
  Apply all migrations: admin, auth, contenttypes, dashboard, sessions
Running migrations:
  Applying contenttypes.0001_initial... OK
  Applying auth.0001_initial... OK
  Applying admin.0001_initial... OK
  Applying admin.0002_logentry_remove_auto_add... OK
  Applying contenttypes.0002_remove_content_type_name... OK
  Applying auth.0002_alter_permission_name_max_length... OK
  Applying auth.0003_alter_user_email_max_length... OK
  Applying auth.0004_alter_user_username_opts... OK
  Applying auth.0005_alter_user_last_login_null... OK
  Applying auth.0006_require_contenttypes_0002... OK
  Applying auth.0007_alter_validators_add_error_messages... OK
  Applying auth.0008_alter_user_username_max_length... OK
  Applying dashboard.0001_squashed_0024_auto_20161205_2214...Traceback (most recent call last):
  File "/app/.heroku/python/lib/python3.5/site-packages/django/db/backends/utils.py", line 64, in execute
    return self.cursor.execute(sql, params)
psycopg2.ProgrammingError: relation "dashboard_dashboards" does not exist


The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "manage.py", line 22, in <module>
    execute_from_command_line(sys.argv)
  File "/app/.heroku/python/lib/python3.5/site-packages/django/core/management/__init__.py", line 367, in execute_from_command_line
    utility.execute()
  File "/app/.heroku/python/lib/python3.5/site-packages/django/core/management/__init__.py", line 359, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/app/.heroku/python/lib/python3.5/site-packages/django/core/management/base.py", line 294, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/app/.heroku/python/lib/python3.5/site-packages/django/core/management/base.py", line 345, in execute
    output = self.handle(*args, **options)
  File "/app/.heroku/python/lib/python3.5/site-packages/django/core/management/commands/migrate.py", line 204, in handle
    fake_initial=fake_initial,
  File "/app/.heroku/python/lib/python3.5/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 "/app/.heroku/python/lib/python3.5/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 "/app/.heroku/python/lib/python3.5/site-packages/django/db/migrations/executor.py", line 244, in apply_migration
    state = migration.apply(state, schema_editor)
  File "/app/.heroku/python/lib/python3.5/site-packages/django/db/backends/base/schema.py", line 92, in __exit__
    self.execute(sql)
  File "/app/.heroku/python/lib/python3.5/site-packages/django/db/backends/base/schema.py", line 112, in execute
    cursor.execute(sql, params)
  File "/app/.heroku/python/lib/python3.5/site-packages/django/db/backends/utils.py", line 64, in execute
    return self.cursor.execute(sql, params)
  File "/app/.heroku/python/lib/python3.5/site-packages/django/db/utils.py", line 94, in __exit__
    six.reraise(dj_exc_type, dj_exc_value, traceback)
  File "/app/.heroku/python/lib/python3.5/site-packages/django/utils/six.py", line 685, in reraise
    raise value.with_traceback(tb)
  File "/app/.heroku/python/lib/python3.5/site-packages/django/db/backends/utils.py", line 64, in execute
    return self.cursor.execute(sql, params)
django.db.utils.ProgrammingError: relation "dashboard_dashboards" does not exist

这是 0001_squashed_0024_auto_20161205_2214.py

operations = [
        migrations.CreateModel(
            name='Dashboards',
            fields=[
                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                ('dashboard_name', models.CharField(max_length=200, unique=True, verbose_name='Dashboard Name')),
                ('create_date', models.DateTimeField(auto_now=True, verbose_name='Dashboard Create Date')),
                ('advisory_end_date', models.DateField(verbose_name='End date of Advisory Process')),
                ('advisory_start_date', models.DateField(verbose_name='Start date of Advisory Process')),
                ('number_of_teams', models.IntegerField(verbose_name='Number of teams')),
            ],
        ),
        migrations.AlterModelOptions(
            name='dashboards',
            options={'verbose_name': 'Dashboard', 'verbose_name_plural': 'Dashboards'},
        ),
        migrations.RenameModel(
            old_name='Dashboards',
            new_name='Dashboard',
        ),
        migrations.RenameField(
            model_name='dashboard',
            old_name='dashboard_name',
            new_name='name',
        ),
        migrations.AlterField(
            model_name='dashboard',
            name='create_date',
            field=models.DateTimeField(auto_now_add=True, verbose_name='Dashboard Create Date'),
        ),

在使用 sqlite3 数据库在本地运行迁移但在使用 postgresql 的 heroku 上本地运行迁移时，迁移工作正常.

The migrations work fine when run them locally with sqlite3 database but not on heroku with postgresql.

推荐答案

这可能对部署到Heroku很有帮助. https://ultimatedjango.com/learn-django/lessons/push-to-heroku/

This might be helpful for deploying to Heroku. https://ultimatedjango.com/learn-django/lessons/push-to-heroku/

问题在于，在Heroku上，您需要先运行迁移，然后再运行服务器，因此这对我有用.

The problem is that on Heroku you need to run migrations before you run the server, so this worked for me.

$ heroku run python manage.py migrate

这篇关于Django:不存在ProgrammingError关系的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！