错误：
PG :: ForeignKeyViolation：错误：更新或删除表＆＃34;用户＆＃34;违反外键约束＆＃34; fk_rails_03de2dc08c＆＃34;在桌子上＆＃34;评论＆＃34;详细信息：Key（id）=（6）仍然从表＆＃34;注释＆＃34;中引用。 ：DELETE FROM＆＃34;用户＆＃34;用户＆＃34;。＆＃34; id＆＃34; = $ 1
def exec_no_cache(sql, name, binds)
type_casted_binds = binds.map { |attr| type_cast(attr.value_for_database) }
log(sql, name, binds) { @connection.async_exec(sql, type_casted_binds) } [HIGHLIGHTING THIS LINE]
end
def exec_cache(sql, name, binds)
发生了什么：
所以我是ruby和rails的新手，只是让应用程序学习 - 我正在为用户使用Devise，每当我尝试在我的应用程序上编辑用户配置文件时，它将
A。）工作正常
或
B.）打破这个错误。
（通常在交替循环中它会断开，如果我重新加载页面然后再继续它将起作用。然后如果我再次尝试编辑用户它将会中断，并且循环继续）
终端：
（采取的措施：加载主页 - ＆gt;加载编辑用户页面 - ＆gt;提交编辑（我没有更改任何值） - ＆gt;错误 - ＆gt;点击返回，加载编辑页面 - ＆gt;提交编辑（我没有更改任何值） - ＆gt;工作。）
Kegans-MacBook-Pro:MyApp Kegan$ rails s
Array values in the parameter to `Gem.paths=` are deprecated.
Please use a String or nil.
An Array ({"GEM_PATH"=>["/Users/Kegan/.rvm/gems/ruby-2.3.1", "/Users/Kegan/.rvm/gems/ruby-2.3.1@global"]}) was passed in from bin/rails:3:in `load'
=> Booting Puma
=> Rails 5.0.0.rc1 application starting in development on http://localhost:3000
=> Run `rails server -h` for more startup options
[Simple Form] Simple Form is not configured in the application and will use the default values. Use `rails generate simple_form:install` to generate the Simple Form configuration.
Puma starting in single mode...
* Version 3.4.0 (ruby 2.3.1-p112), codename: Owl Bowl Brawl
* Min threads: 5, max threads: 5
* Environment: development
* Listening on tcp://localhost:3000
Use Ctrl-C to stop
Started GET "/" for ::1 at 2016-06-10 14:15:05 -0600
ActiveRecord::SchemaMigration Load (0.5ms) SELECT "schema_migrations".* FROM "schema_migrations"
Processing by HomeController#index as HTML
Rendering home/index.html.erb within layouts/application
User Load (0.9ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT $2 [["id", 6], ["LIMIT", 1]]
Link Load (0.5ms) SELECT "links".* FROM "links" ORDER BY "links"."id" DESC LIMIT $1 [["LIMIT", 1]]
CACHE (0.0ms) SELECT "links".* FROM "links" ORDER BY "links"."id" DESC LIMIT $1 [["LIMIT", 1]]
User Load (0.3ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2 [["id", 6], ["LIMIT", 1]]
(1.0ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 8], ["votable_type", "Link"], ["vote_flag", true]]
(0.4ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 8], ["votable_type", "Link"], ["vote_flag", false]]
Forum Load (0.5ms) SELECT "forums".* FROM "forums" ORDER BY "forums"."id" DESC LIMIT $1 [["LIMIT", 1]]
CACHE (0.0ms) SELECT "forums".* FROM "forums" ORDER BY "forums"."id" DESC LIMIT $1 [["LIMIT", 1]]
CACHE (0.0ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2 [["id", 6], ["LIMIT", 1]]
Rendered home/index.html.erb within layouts/application (84.0ms)
Completed 200 OK in 291ms (Views: 263.2ms | ActiveRecord: 16.4ms)
Started GET "/cable" for ::1 at 2016-06-10 14:15:05 -0600
Started GET "/cable/" [WebSocket] for ::1 at 2016-06-10 14:15:05 -0600
Successfully upgraded to WebSocket (REQUEST_METHOD: GET, HTTP_CONNECTION: Upgrade, HTTP_UPGRADE: websocket)
User Load (0.3ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2 [["id", 6], ["LIMIT", 1]]
[ActionCable] [joshgamer1@gmail.com] Registered connection (Z2lkOi8va29ob3JkL1VzZXIvNg)
[ActionCable] [joshgamer1@gmail.com] RoomChannel is transmitting the subscription confirmation
[ActionCable] [joshgamer1@gmail.com] RoomChannel is streaming from room_channel
Started GET "/users/edit" for ::1 at 2016-06-10 14:15:10 -0600
Processing by Devise::RegistrationsController#edit as HTML
User Load (0.5ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT $2 [["id", 6], ["LIMIT", 1]]
DEPRECATION WARNING: [Devise] Changing the sanitized parameters through "Devise::ParameterSanitizer#for(sign_up) is deprecated and it will be removed from Devise 4.2.
Please use the `permit` method:
devise_parameter_sanitizer.permit(:sign_up) do |user|
# Your block here.
end
(called from configure_permitted_parameters at /Users/Kegan/Documents/AppDev/myApp/app/controllers/application_controller.rb:10)
DEPRECATION WARNING: [Devise] Changing the sanitized parameters through "Devise::ParameterSanitizer#for(account_update) is deprecated and it will be removed from Devise 4.2.
Please use the `permit` method:
devise_parameter_sanitizer.permit(:account_update) do |user|
# Your block here.
end
(called from configure_permitted_parameters at /Users/Kegan/Documents/AppDev/MyApp/app/controllers/application_controller.rb:11)
Rendering devise/registrations/edit.html.erb within layouts/application
Rendered devise/registrations/edit.html.erb within layouts/application (14.5ms)
Completed 200 OK in 81ms (Views: 77.5ms | ActiveRecord: 0.5ms)
Started DELETE "/users" for ::1 at 2016-06-10 14:15:18 -0600
Processing by Devise::RegistrationsController#destroy as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"9Ou51KmxWKW+SheDAZl86Rtb8jMQBDSVZswiwfkHxUpg2b4DA/9xneXzPXsckQ7V6oy6MqBkWPctS24X1Z9V7w==", "user"=>{"avatar"=>"", "name"=>"Joshua Artos", "email"=>"joshgamer1@gmail.com", "password"=>"[FILTERED]", "bio"=>"Josh. Kick ass at video games.", "location"=>"Fort Collins", "age"=>"18", "gender"=>"Doesn't Matter", "interestedin"=>"Netfix", "major"=>"Doesn't Matter", "twitterurl"=>"", "instagramurl"=>"", "current_password"=>"[FILTERED]"}, "commit"=>"Update"}
User Load (0.5ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT $2 [["id", 6], ["LIMIT", 1]]
DEPRECATION WARNING: [Devise] Changing the sanitized parameters through "Devise::ParameterSanitizer#for(sign_up) is deprecated and it will be removed from Devise 4.2.
Please use the `permit` method:
devise_parameter_sanitizer.permit(:sign_up) do |user|
# Your block here.
end
(called from configure_permitted_parameters at /Users/Kegan/Documents/AppDev/MyApp/app/controllers/application_controller.rb:10)
DEPRECATION WARNING: [Devise] Changing the sanitized parameters through "Devise::ParameterSanitizer#for(account_update) is deprecated and it will be removed from Devise 4.2.
Please use the `permit` method:
devise_parameter_sanitizer.permit(:account_update) do |user|
# Your block here.
end
(called from configure_permitted_parameters at /Users/Kegan/Documents/MyApp/Kohord/app/controllers/application_controller.rb:11)
(0.1ms) BEGIN
SQL (2.3ms) DELETE FROM "users" WHERE "users"."id" = $1 [["id", 6]]
(0.1ms) ROLLBACK
Completed 500 Internal Server Error in 10ms (ActiveRecord: 3.0ms)
ActiveRecord::InvalidForeignKey (PG::ForeignKeyViolation: ERROR: update or delete on table "users" violates foreign key constraint "fk_rails_03de2dc08c" on table "comments"
DETAIL: Key (id)=(6) is still referenced from table "comments".
: DELETE FROM "users" WHERE "users"."id" = $1):
activerecord (5.0.0.rc1) lib/active_record/connection_adapters/postgresql_adapter.rb:598:in `async_exec'
activerecord (5.0.0.rc1) lib/active_record/connection_adapters/postgresql_adapter.rb:598:in `block in exec_no_cache'
activerecord (5.0.0.rc1) lib/active_record/connection_adapters/abstract_adapter.rb:566:in `block in log'
activesupport (5.0.0.rc1) lib/active_support/notifications/instrumenter.rb:21:in `instrument'
activerecord (5.0.0.rc1) lib/active_record/connection_adapters/abstract_adapter.rb:560:in `log'
activerecord (5.0.0.rc1) lib/active_record/connection_adapters/postgresql_adapter.rb:598:in `exec_no_cache'
activerecord (5.0.0.rc1) lib/active_record/connection_adapters/postgresql_adapter.rb:587:in `execute_and_clear'
activerecord (5.0.0.rc1) lib/active_record/connection_adapters/postgresql/database_statements.rb:116:in `exec_delete'
activerecord (5.0.0.rc1) lib/active_record/connection_adapters/abstract/database_statements.rb:140:in `delete'
activerecord (5.0.0.rc1) lib/active_record/connection_adapters/abstract/query_cache.rb:14:in `delete'
activerecord (5.0.0.rc1) lib/active_record/relation.rb:543:in `delete_all'
activerecord (5.0.0.rc1) lib/active_record/persistence.rb:525:in `destroy_row'
activerecord (5.0.0.rc1) lib/active_record/counter_cache.rb:141:in `destroy_row'
activerecord (5.0.0.rc1) lib/active_record/locking/optimistic.rb:115:in `destroy_row'
activerecord (5.0.0.rc1) lib/active_record/persistence.rb:184:in `destroy'
activerecord (5.0.0.rc1) lib/active_record/callbacks.rb:283:in `block in destroy'
activesupport (5.0.0.rc1) lib/active_support/callbacks.rb:126:in `call'
activesupport (5.0.0.rc1) lib/active_support/callbacks.rb:506:in `block (2 levels) in compile'
activesupport (5.0.0.rc1) lib/active_support/callbacks.rb:455:in `call'
activesupport (5.0.0.rc1) lib/active_support/callbacks.rb:101:in `__run_callbacks__'
activesupport (5.0.0.rc1) lib/active_support/callbacks.rb:750:in `_run_destroy_callbacks'
activerecord (5.0.0.rc1) lib/active_record/callbacks.rb:283:in `destroy'
activerecord (5.0.0.rc1) lib/active_record/transactions.rb:314:in `block in destroy'
activerecord (5.0.0.rc1) lib/active_record/transactions.rb:395:in `block in with_transaction_returning_status'
activerecord (5.0.0.rc1) lib/active_record/connection_adapters/abstract/database_statements.rb:232:in `block in transaction'
activerecord (5.0.0.rc1) lib/active_record/connection_adapters/abstract/transaction.rb:189:in `within_new_transaction'
activerecord (5.0.0.rc1) lib/active_record/connection_adapters/abstract/database_statements.rb:232:in `transaction'
activerecord (5.0.0.rc1) lib/active_record/transactions.rb:211:in `transaction'
activerecord (5.0.0.rc1) lib/active_record/transactions.rb:392:in `with_transaction_returning_status'
activerecord (5.0.0.rc1) lib/active_record/transactions.rb:314:in `destroy'
devise (4.1.1) app/controllers/devise/registrations_controller.rb:66:in `destroy'
actionpack (5.0.0.rc1) lib/action_controller/metal/basic_implicit_render.rb:4:in `send_action'
actionpack (5.0.0.rc1) lib/abstract_controller/base.rb:181:in `process_action'
actionpack (5.0.0.rc1) lib/action_controller/metal/rendering.rb:30:in `process_action'
actionpack (5.0.0.rc1) lib/abstract_controller/callbacks.rb:20:in `block in process_action'
activesupport (5.0.0.rc1) lib/active_support/callbacks.rb:126:in `call'
activesupport (5.0.0.rc1) lib/active_support/callbacks.rb:506:in `block (2 levels) in compile'
activesupport (5.0.0.rc1) lib/active_support/callbacks.rb:455:in `call'
activesupport (5.0.0.rc1) lib/active_support/callbacks.rb:101:in `__run_callbacks__'
activesupport (5.0.0.rc1) lib/active_support/callbacks.rb:750:in `_run_process_action_callbacks'
activesupport (5.0.0.rc1) lib/active_support/callbacks.rb:90:in `run_callbacks'
actionpack (5.0.0.rc1) lib/abstract_controller/callbacks.rb:19:in `process_action'
actionpack (5.0.0.rc1) lib/action_controller/metal/rescue.rb:31:in `process_action'
actionpack (5.0.0.rc1) lib/action_controller/metal/instrumentation.rb:32:in `block in process_action'
activesupport (5.0.0.rc1) lib/active_support/notifications.rb:164:in `block in instrument'
activesupport (5.0.0.rc1) lib/active_support/notifications/instrumenter.rb:21:in `instrument'
activesupport (5.0.0.rc1) lib/active_support/notifications.rb:164:in `instrument'
actionpack (5.0.0.rc1) lib/action_controller/metal/instrumentation.rb:30:in `process_action'
actionpack (5.0.0.rc1) lib/action_controller/metal/params_wrapper.rb:248:in `process_action'
activerecord (5.0.0.rc1) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
actionpack (5.0.0.rc1) lib/abstract_controller/base.rb:126:in `process'
actionview (5.0.0.rc1) lib/action_view/rendering.rb:30:in `process'
actionpack (5.0.0.rc1) lib/action_controller/metal.rb:190:in `dispatch'
actionpack (5.0.0.rc1) lib/action_controller/metal.rb:262:in `dispatch'
actionpack (5.0.0.rc1) lib/action_dispatch/routing/route_set.rb:50:in `dispatch'
actionpack (5.0.0.rc1) lib/action_dispatch/routing/route_set.rb:32:in `serve'
actionpack (5.0.0.rc1) lib/action_dispatch/routing/mapper.rb:16:in `block in <class:Constraints>'
actionpack (5.0.0.rc1) lib/action_dispatch/routing/mapper.rb:46:in `serve'
actionpack (5.0.0.rc1) lib/action_dispatch/journey/router.rb:39:in `block in serve'
actionpack (5.0.0.rc1) lib/action_dispatch/journey/router.rb:26:in `each'
actionpack (5.0.0.rc1) lib/action_dispatch/journey/router.rb:26:in `serve'
actionpack (5.0.0.rc1) lib/action_dispatch/routing/route_set.rb:725:in `call'
actionview (5.0.0.rc1) lib/action_view/digestor.rb:12:in `call'
warden (1.2.6) lib/warden/manager.rb:35:in `block in call'
warden (1.2.6) lib/warden/manager.rb:34:in `catch'
warden (1.2.6) lib/warden/manager.rb:34:in `call'
rack (2.0.0.rc1) lib/rack/etag.rb:25:in `call'
rack (2.0.0.rc1) lib/rack/conditional_get.rb:38:in `call'
rack (2.0.0.rc1) lib/rack/head.rb:12:in `call'
rack (2.0.0.rc1) lib/rack/session/abstract/id.rb:222:in `context'
rack (2.0.0.rc1) lib/rack/session/abstract/id.rb:216:in `call'
actionpack (5.0.0.rc1) lib/action_dispatch/middleware/cookies.rb:613:in `call'
activerecord (5.0.0.rc1) lib/active_record/migration.rb:552:in `call'
actionpack (5.0.0.rc1) lib/action_dispatch/middleware/callbacks.rb:38:in `block in call'
activesupport (5.0.0.rc1) lib/active_support/callbacks.rb:97:in `__run_callbacks__'
activesupport (5.0.0.rc1) lib/active_support/callbacks.rb:750:in `_run_call_callbacks'
activesupport (5.0.0.rc1) lib/active_support/callbacks.rb:90:in `run_callbacks'
actionpack (5.0.0.rc1) lib/action_dispatch/middleware/callbacks.rb:36:in `call'
actionpack (5.0.0.rc1) lib/action_dispatch/middleware/executor.rb:12:in `call'
actionpack (5.0.0.rc1) lib/action_dispatch/middleware/remote_ip.rb:79:in `call'
actionpack (5.0.0.rc1) lib/action_dispatch/middleware/debug_exceptions.rb:49:in `call'
web-console (2.3.0) lib/web_console/middleware.rb:28:in `block in call'
web-console (2.3.0) lib/web_console/middleware.rb:18:in `catch'
web-console (2.3.0) lib/web_console/middleware.rb:18:in `call'
actionpack (5.0.0.rc1) lib/action_dispatch/middleware/show_exceptions.rb:31:in `call'
railties (5.0.0.rc1) lib/rails/rack/logger.rb:36:in `call_app'
railties (5.0.0.rc1) lib/rails/rack/logger.rb:24:in `block in call'
activesupport (5.0.0.rc1) lib/active_support/tagged_logging.rb:70:in `block in tagged'
activesupport (5.0.0.rc1) lib/active_support/tagged_logging.rb:26:in `tagged'
activesupport (5.0.0.rc1) lib/active_support/tagged_logging.rb:70:in `tagged'
railties (5.0.0.rc1) lib/rails/rack/logger.rb:24:in `call'
actionpack (5.0.0.rc1) lib/action_dispatch/middleware/request_id.rb:24:in `call'
rack (2.0.0.rc1) lib/rack/method_override.rb:22:in `call'
rack (2.0.0.rc1) lib/rack/runtime.rb:22:in `call'
activesupport (5.0.0.rc1) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
actionpack (5.0.0.rc1) lib/action_dispatch/middleware/executor.rb:12:in `call'
actionpack (5.0.0.rc1) lib/action_dispatch/middleware/static.rb:136:in `call'
rack (2.0.0.rc1) lib/rack/sendfile.rb:111:in `call'
railties (5.0.0.rc1) lib/rails/engine.rb:522:in `call'
puma (3.4.0) lib/puma/configuration.rb:224:in `call'
puma (3.4.0) lib/puma/server.rb:569:in `handle_request'
puma (3.4.0) lib/puma/server.rb:406:in `process_client'
puma (3.4.0) lib/puma/server.rb:271:in `block in run'
puma (3.4.0) lib/puma/thread_pool.rb:114:in `block in spawn_thread'
Rendering /Users/KingKegan/.rvm/gems/ruby-2.3.1/gems/actionpack-5.0.0.rc1/lib/action_dispatch/middleware/templates/rescues/diagnostics.html.erb within rescues/layout
Rendering /Users/KingKegan/.rvm/gems/ruby-2.3.1/gems/actionpack-5.0.0.rc1/lib/action_dispatch/middleware/templates/rescues/_source.html.erb
Rendered /Users/KingKegan/.rvm/gems/ruby-2.3.1/gems/actionpack-5.0.0.rc1/lib/action_dispatch/middleware/templates/rescues/_source.html.erb (6.5ms)
Rendering /Users/KingKegan/.rvm/gems/ruby-2.3.1/gems/actionpack-5.0.0.rc1/lib/action_dispatch/middleware/templates/rescues/_trace.html.erb
Rendered /Users/KingKegan/.rvm/gems/ruby-2.3.1/gems/actionpack-5.0.0.rc1/lib/action_dispatch/middleware/templates/rescues/_trace.html.erb (3.8ms)
Rendering /Users/KingKegan/.rvm/gems/ruby-2.3.1/gems/actionpack-5.0.0.rc1/lib/action_dispatch/middleware/templates/rescues/_request_and_response.html.erb
Rendered /Users/KingKegan/.rvm/gems/ruby-2.3.1/gems/actionpack-5.0.0.rc1/lib/action_dispatch/middleware/templates/rescues/_request_and_response.html.erb (1.6ms)
Rendered /Users/KingKegan/.rvm/gems/ruby-2.3.1/gems/actionpack-5.0.0.rc1/lib/action_dispatch/middleware/templates/rescues/diagnostics.html.erb within rescues/layout (52.5ms)
（删除了一些缓解字符限制的渲染）
[ActionCable] [joshgamer1@gmail.com] Finished "/cable/" [WebSocket] for ::1 at 2016-06-10 14:15:18 -0600
[ActionCable] [joshgamer1@gmail.com] RoomChannel stopped streaming from room_channel
Started GET "/cable" for ::1 at 2016-06-10 14:15:21 -0600
Started GET "/cable/" [WebSocket] for ::1 at 2016-06-10 14:15:21 -0600
Successfully upgraded to WebSocket (REQUEST_METHOD: GET, HTTP_CONNECTION: Upgrade, HTTP_UPGRADE: websocket)
User Load (0.4ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2 [["id", 6], ["LIMIT", 1]]
[ActionCable] [joshgamer1@gmail.com] Registered connection (Z2lkOi8va29ob3JkL1VzZXIvNg)
[ActionCable] [joshgamer1@gmail.com] RoomChannel is transmitting the subscription confirmation
[ActionCable] [joshgamer1@gmail.com] RoomChannel is streaming from room_channel
Started PUT "/users" for ::1 at 2016-06-10 14:15:28 -0600
Processing by Devise::RegistrationsController#update as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"MfnKmUW4Xfct9NyjC9bbwfEDusLvTYXHQRuqyltHr1yly81O7/Z0z3ZN9lsW3qn9ANTyw18t6aUKnOYcd98/+Q==", "user"=>{"avatar"=>"", "name"=>"Joshua Artos", "email"=>"joshgamer1@gmail.com", "password"=>"[FILTERED]", "bio"=>"Josh. Kick ass at video games.", "location"=>"Fort Collins", "age"=>"18", "gender"=>"Doesn't Matter", "interestedin"=>"Netfix", "major"=>"Doesn't Matter", "twitterurl"=>"", "instagramurl"=>"", "current_password"=>"[FILTERED]"}, "commit"=>"Update"}
User Load (0.5ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT $2 [["id", 6], ["LIMIT", 1]]
DEPRECATION WARNING: [Devise] Changing the sanitized parameters through "Devise::ParameterSanitizer#for(sign_up) is deprecated and it will be removed from Devise 4.2.
Please use the `permit` method:
devise_parameter_sanitizer.permit(:sign_up) do |user|
# Your block here.
end
(called from configure_permitted_parameters at /Users/Kegan/Documents/AppDev/MyApp/app/controllers/application_controller.rb:10)
DEPRECATION WARNING: [Devise] Changing the sanitized parameters through "Devise::ParameterSanitizer#for(account_update) is deprecated and it will be removed from Devise 4.2.
Please use the `permit` method:
devise_parameter_sanitizer.permit(:account_update) do |user|
# Your block here.
end
(called from configure_permitted_parameters at /Users/Kegan/Documents/AppDev/MyApp/app/controllers/application_controller.rb:11)
User Load (0.5ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2 [["id", 6], ["LIMIT", 1]]
(0.2ms) BEGIN
(0.2ms) COMMIT
Redirected to http://localhost:3000/
Completed 302 Found in 94ms (ActiveRecord: 1.3ms)
Started GET "/" for ::1 at 2016-06-10 14:15:28 -0600
Processing by HomeController#index as HTML
Rendering home/index.html.erb within layouts/application
User Load (0.5ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT $2 [["id", 6], ["LIMIT", 1]]
Link Load (0.3ms) SELECT "links".* FROM "links" ORDER BY "links"."id" DESC LIMIT $1 [["LIMIT", 1]]
CACHE (0.0ms) SELECT "links".* FROM "links" ORDER BY "links"."id" DESC LIMIT $1 [["LIMIT", 1]]
User Load (0.3ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2 [["id", 6], ["LIMIT", 1]]
(0.5ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 8], ["votable_type", "Link"], ["vote_flag", true]]
(0.9ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 8], ["votable_type", "Link"], ["vote_flag", false]]
Forum Load (0.3ms) SELECT "forums".* FROM "forums" ORDER BY "forums"."id" DESC LIMIT $1 [["LIMIT", 1]]
CACHE (0.0ms) SELECT "forums".* FROM "forums" ORDER BY "forums"."id" DESC LIMIT $1 [["LIMIT", 1]]
CACHE (0.0ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2 [["id", 6], ["LIMIT", 1]]
Rendered home/index.html.erb within layouts/application (14.5ms)
Completed 200 OK in 56ms (Views: 51.7ms | ActiveRecord: 2.8ms)
[ActionCable] [joshgamer1@gmail.com] Finished "/cable/" [WebSocket] for ::1 at 2016-06-10 14:15:28 -0600
[ActionCable] [joshgamer1@gmail.com] RoomChannel stopped streaming from room_channel
Started GET "/cable" for ::1 at 2016-06-10 14:15:28 -0600
Started GET "/cable/" [WebSocket] for ::1 at 2016-06-10 14:15:28 -0600
部分代码：
用户模型：
class User < ApplicationRecord
# Include default devise modules. Others available are:
# :confirmable, :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
has_many :forums
has_many :links
has_many :discussions
has_many :comments
has_many :chats
has_many :chatrooms, through: :chats
# It returns the articles whose titles contain one or more words that form the query
def self.search(query)
# where(:title, query) -> This would return an exact match of the query
where("name like ?", "%#{query}%")
end
has_attached_file :avatar, :styles => { :medium => "300x300>", :thumb => "100x100#" }, :default_url => "/images/:style/missingMike.png"
validates_attachment_content_type :avatar, :content_type => /\Aimage\/.*\Z/
end
用户控制器：
class UsersController < ApplicationController
def index
if params[:search]
@users = User.search(params[:search])
@users = @users.paginate(:page => params[:page], :per_page => 5)
else
@users = User.paginate(:page => params[:page], :per_page => 2)
end
end
def show
@user = User.find(params[:id])
@user_links = @user.links
@user_comments = @user.comments
@user_forums = @user.forums
@user_discussions = @user.discussions
end
def goAnonymous
@user = User.find(params[:id])
@user.anonymous = true
redirect_to :back
end
def leaveAnonymous
@user = User.find(params[:id])
@user.anonymous = false
redirect_to :back
end
end
应用程序控制器
class ApplicationController < ActionController::Base
# Prevent CSRF attacks by raising an exception.
# For APIs, you may want to use :null_session instead.
protect_from_forgery with: :exception
before_filter :configure_permitted_parameters, if: :devise_controller?
protected
def configure_permitted_parameters
devise_parameter_sanitizer.for(:sign_up) { |u| u.permit(:name, :email, :password) }
devise_parameter_sanitizer.for(:account_update) { |u| u.permit(:name, :email, :password, :current_password, :avatar, :bio, :gender, :location, :interestedin, :major, :age, :instagramurl, :twitterurl, :anonymous) }
end
end
/views/devise/registrations/edit.html.erb
<h2 class="foldersBox">Edit <%= resource_name.to_s.humanize %></h2>
<%= form_for(resource, as: resource_name, url: registration_path(resource_name), html: { method: :put }) do |f| %>
<%= devise_error_messages! %>
<div class="foldersBox card-wrap">
<div>
<div>
<div id="label">
<%= f.label :avatar %>
<%= f.file_field :avatar, class: "form-control" %>
</div>
<div>
<%= f.label :name %>
<%= f.text_field :name, class: "form-control", :autofocus => true %>
</div>
<div>
<%= f.label :email %>
<%= f.email_field :email, class: "form-control", :autofocus => true %>
</div>
<div>
<%= f.label :password %> <i>(leave blank if you don't want to change it)</i>
<%= f.password_field :password, class: "form-control", :autocomplete => "off" %>
</div>
<br>
<h4>Fun Stuff:</h4>
<div>
Bio: (At least try to be funny)<br>
<%= f.text_area :bio, class: "form-control" %>
</div>
<div>
Location:<br>
<%= f.text_field :location, class: "form-control" %>
</div>
<div>
Age: (Most likely the brief time frame when you won't lie about your age (21-24))br>
<%= f.select :age, (18..99), class: "form-control" %>
</div>
<div>
Gender (Whatever is PC right now):<br>
<%= f.text_field :gender, class: "form-control" %>
</div>
<div>
Interested In:<br>
<%= f.text_area :interestedin, class: "form-control" %>
</div>
<div>
Major: (Like you won't change in a semester, probably just leave blank)<br>
<%= f.text_area :major, class: "form-control" %>
</div>
<h4>Social Media Stuff</h4>
<div>
Twitter:<br>
@<%= f.text_field :twitterurl, class: "form-control" %>
</div>
<div>
Instagram:<br>
@<%= f.text_field :instagramurl, class: "form-control" %>
</div>
<div>
<strong><%= f.label :current_password, class: "currentPasswordForm" %></strong> <i>(we need your current password to confirm your changes)</i>
<%= f.password_field :current_password, autocomplete: "off", class: "form-control" %>
</div>
</div>
<div>
<%= f.submit "Update", class: "updateBTN" %>
</div>
<% end %>
</div>
<div>
<br><br>
<br><i>
Cancel my account<br>
Unhappy? <%= button_to "Cancel my account", registration_path(resource_name), data: {
confirm: "Are you sure?" }, method: :delete %>
</i>
</div>
</div>
迁移评论：
class CreateComments < ActiveRecord::Migration
def change
create_table :comments do |t|
t.integer :link_id
t.text :body
t.references :user, index: true, foreign_key: true
t.timestamps null: false
end
add_index :comments, :link_id
end
end
评论模型：
class Comment < ApplicationRecord
belongs_to :user
belongs_to :link
end
答案 0 :(得分：1)
如果您将数据库回滚到迁移之前（db：rollback或db：migrate：down VERSION =迁移文件名的数字部分。）
最后将您的迁移更改为引用链接，而不仅仅是link_id。重新运行您的迁移：
来自
class CreateComments < ActiveRecord::Migration
def change
create_table :comments do |t|
t.integer :link_id
t.text :body
t.references :user, index: true, foreign_key: true
t.timestamps null: false
end
add_index :comments, :link_id
end
end
到
class CreateComments < ActiveRecord::Migration
def change
create_table :comments do |t|
t.text :body
t.references :user, index: true, foreign_key: true
t.references :link, index: true, foreign_key: true
t.timestamps null: false
end
add_index :comments
end
end
要通过迁移执行此操作，您需要执行以下操作：
rails g migration RemoveLink_IdFromComments
def change
remove_column :comments, :link_id
end
rails g migration AddLinkToComments
def change
add_reference :comments, :link, index: true, foreign_key: true
end
答案 1 :(得分：0)
我相信Activity导致了这个问题。我想你需要摆脱它并再次添加对你的表的链接引用并尝试。
belongs_to :link运行rake db：migrate并重试。如果能解决您的问题，请告诉我。
rails g migration RemoveLinkIdFromComments link_id:integer
rails g migration AddLinkRefToComments link:references
#Do check your newly created migration files it everything is correct.
如果我们查看错误，我们可以看到我们的关联错误。 您可以删除开发数据库中的所有内容（所有数据），然后重试。
答案 2 :(得分：0)
我有类似的错误。试图删除用户。 PG在一个帖子上提出了一个例外。 问题是我删除了id = 3的用户。但是数据库中的帖子的user_id为3.
将dependent: :destroy添加到关联中为我修复了它。删除用户时，它将删除所有用户的帖子。
尝试：
has_many :comments, dependent: :destroy