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

Question

开发一个只使用API的Rails应用程序来使用来自API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，我们更改了我们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，签出了一个新分支，运行迁移以更改数据字段的数据类型，决定对它的工作方式不满意，回滚了迁移，提交并签出了主分支。应用程序正常返回数据。但是，现在当我使用诸如.first、.last等查找方法在Rails控制台中测试模型的记录时，我得到了下面的错误。他们以前工作得很好。

我环顾四周，没有看到任何关于这个特定错误的线程（它们似乎都处理为显示页面查找单个记录）--尽管这个线程和这个线程（扩展）似乎最接近。检查我正在使用的数据库上的用户会发现错误中的用户ID（“501”）不存在。

提前谢了。

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'

我肯定会拿到我的记录--它们会进入数据库：

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 | {}

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

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

如果出现这个错误，这似乎是Spring的问题，而不是数据库的问题：

/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停止