ActiveRecord :: NoDatabaseError:具有ID的本地用户不存在

Question

开发一个仅限API的Rails应用程序来使用API​​中的数据,过滤掉许多字段,然后广播我们想要公开的字段.

我的应用程序正常返回数据,但我意识到在源API级别上,我们更改了我们正在公开的数据字段之一的数据类型.为了适应,我提交了我的工作,检查了一个新分支,运行迁移以更改数据字段的数据类型,决定我对它的工作方式不满意,回滚迁移,提交和签出主分支.该应用正常返回数据.但是,现在当我使用取景器的方法,如在Rails的控制台测试我的模型的记录.first,.last等等,我得到下面的错误.他们以前工作得很好.

我环顾四周,并没有看到任何关于这个特定错误的线程(他们似乎都在寻找显示页面的个别记录) - 虽然这个,这个线程(通过扩展)看起来最接近.检查我正在使用的数据库上的用户显示错误中的用户ID("501")不存在.

我做了什么,我需要做什么才能再次调用finder方法？我是否需要在我的数据库中的错误中创建引用的用户？(为什么它不是我一直用来连接到我的数据库的默认用户？错误中的用户ID来自哪里？它甚至重要吗？)

ps - 如果它是相关的,我曾经rake db:rollback根据这个线程回滚我的迁移.

提前致谢.

Rails控制台

.2.1 :001 > KoboApi.first
ActiveRecord::NoDatabaseError: local user with ID 501 does not exist

    from /Users/toby/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.5.1/lib/active_record/connection_adapters/postgresql_adapter.rb:661:in `rescue in connect'
    from /Users/toby/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.5.1/lib/active_record/connection_adapters/postgresql_adapter.rb:651:in `connect'
    from /Users/toby/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.5.1/lib/active_record/connection_adapters/postgresql_adapter.rb:242:in `initialize'
    from /Users/toby/.rvm/gems/ruby-2.2.1/gems/activerecord-postgis-adapter-3.1.4/lib/active_record/connection_adapters/postgis_adapter.rb:51:in `initialize'
    from /Users/toby/.rvm/gems/ruby-2.2.1/gems/activerecord-postgis-adapter-3.1.4/lib/active_record/connection_adapters/postgis/create_connection.rb:37:in `new'
    from /Users/toby/.rvm/gems/ruby-2.2.1/gems/activerecord-postgis-adapter-3.1.4/lib/active_record/connection_adapters/postgis/create_connection.rb:37:in `postgis_connection'
    from /Users/toby/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.5.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:438:in `new_connection'
    from /Users/toby/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.5.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:448:in `checkout_new_connection'
    from /Users/toby/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.5.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:422:in `acquire_connection'
    from /Users/toby/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.5.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:349:in `block in checkout'
    from /Users/toby/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/monitor.rb:211:in `mon_synchronize'
    from /Users/toby/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.5.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:348:in `checkout'
    from /Users/toby/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.5.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:263:in `block in connection'
    from /Users/toby/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/monitor.rb:211:in `mon_synchronize'
    from /Users/toby/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.5.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:262:in `connection'
    from /Users/toby/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.5.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:571:in `retrieve_connection'
... 13 levels...
    from /Users/toby/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5.1/lib/rails/commands/console.rb:9:in `start'
    from /Users/toby/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5.1/lib/rails/commands/commands_tasks.rb:68:in `console'
    from /Users/toby/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5.1/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
    from /Users/toby/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5.1/lib/rails/commands.rb:17:in `<top (required)>'
    from /Users/toby/.rvm/gems/ruby-2.2.1/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:in `require'
    from /Users/toby/.rvm/gems/ruby-2.2.1/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:in `block in require'
    from /Users/toby/.rvm/gems/ruby-2.2.1/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:240:in `load_dependency'
    from /Users/toby/.rvm/gems/ruby-2.2.1/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:in `require'
    from /Users/toby/code/projects/koboApi-broker/bin/rails:9:in `<top (required)>'
    from /Users/toby/.rvm/gems/ruby-2.2.1/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:268:in `load'
    from /Users/toby/.rvm/gems/ruby-2.2.1/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:268:in `block in load'
    from /Users/toby/.rvm/gems/ruby-2.2.1/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:240:in `load_dependency'
    from /Users/toby/.rvm/gems/ruby-2.2.1/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:268:in `load'
    from /Users/toby/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /Users/toby/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'

我肯定得到我的记录 - 他们进入数据库:

Rails dbconsole

koboApi_development=# select * from kobo_apis limit 1;
  id  | lemurs_quantity | month_and_year | _geolocation | lemur_category | location_admin1 | location_admin2 | record_id | sighting_month | sighting_year
------+-----------------+----------------+--------------+----------------+-----------------+-----------------+-----------+----------------+---------------
 1365 |               1 |                |              | I_dont_remembe | antsiranana     | diana           |   1234567 | no_response    | 2013
(1 row)

koboApi_development=# \du
                             List of roles
 Role name |                   Attributes                   | Member of
-----------+------------------------------------------------+-----------
 [user]    | Superuser, Create role, Create DB, Replication | {}

从我的架构

ActiveRecord::Schema.define(version: 20160705203507) do

  # These are extensions that must be enabled in order to support this database
  enable_extension "plpgsql"
  enable_extension "postgis"

  create_table "kobo_apis", force: :cascade do |t|
    t.integer "lemurs_quantity"
    t.date    "month_and_year"
    t.text    "_geolocation"
    t.text    "lemur_category"
    t.string  "location_admin1"
    t.string  "location_admin2"
    t.integer "record_id"
    t.string  "sighting_month"
    t.string  "sighting_year"
  end

  create_table "my_spatial_table", force: :cascade do |t|
    t.geography "polygon_data", limit: {:srid=>4326, :type=>"polygon", :geographic=>true}
  end

end

我的database.yml

development:
  adapter: postgis
  encoding: unicode
  postgis_extension: postgis      # default is postgis
  postgis_schema: public          # default is public
  schema_search_path: public,postgis
  database: koboApi_development
  pool: 5

test:
  adapter: postgresql
  encoding: unicode
  database: koboApi_test
  pool: 5

production:
  adapter: postgresql
  encoding: unicode
  database: koboApi_production
  pool: 5

Answer 1

它似乎是Spring的问题,而不是数据库,如果你收到这个错误:

/Users/yad/.rvm/gems/ruby-2.3.0/gems/activerecord-4.2.6/lib/active_record/connection_adapters/postgresql_adapter.rb:661:in `rescue in connect': local user with ID 501 does not exist
 (ActiveRecord::NoDatabaseError)

在rails根目录中输入:

spring stop

它应该说:

Spring stopped.

并且迁移将在那之后工作!

Answer 2

我将分享对我有用的东西,这听起来像个笑话,但事实并非如此.

我再次打开和关闭它.

我的意思是我杀死了需要与我的设置并行运行的Redis实例,隐藏了分支上的本地更改,并再次尝试.它奏效了!

之后我只杀了Unicorn服务器,弹出存储以恢复我的本地更改并重新启动.是的,它仍然奏效.

这没有任何意义,我知道并且因为没有更好的解释而道歉.

我唯一的猜测是,我可能让Unicorn和Redis服务器运行时间太长(上次关闭我的Mac时不记得),而且可能有些东西搞砸了.如果是这种情况,那么重新启动整个堆栈可能就是解决方案.

亲爱的读者,希望这能让你对这个神秘的错误有所了解.

Answer 3

该错误与您的业务数据无关。查看日志的最上面几行...

ActiveRecord::NoDatabaseError: local user with ID 501 does not exist

    from /Users/toby/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.5.1/lib/active_record/connection_adapters/postgresql_adapter.rb:661:in `rescue in connect'
    from /Users/toby/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.5.1/lib/active_record/connection_adapters/postgresql_adapter.rb:651:in `connect'

...很明显Rails无法连接到数据库。

提到的本地用户可能是配置为访问 postgres 数据库的操作系统用户，并且其记录已被删除或损坏。

尝试从控制台连接到您的数据库psql，看看是否有任何问题。该命令应该看起来像这样。

psql --host=localhost --port=5432 --username=<your postgres user> --password --dbname=koboApi_development

由于您的username数据库配置中未设置，因此它可能来自环境变量。检查它是否包含正确的值。