PG :: DatatypeMismatch：錯誤：列 「分數」 爲整數類型，但表達的類型是文本

Question

這裏是我的代碼：

factors.each do |f| 
     factor_score_var = "factorScore_#{f.id}" 
     params['score'] = params[factor_score_var] 
     new_scorecard.scorecard_scores.create(params.permit(:score)) 
    end 

以下是錯誤：

PG::DatatypeMismatch: ERROR: column "score" is of type integer but expression is of type text at character 98 HINT: You will need to rewrite or cast the expression. 

我有嘗試投與'to_i'等分數參數..：

params['score'] = params[factor_score_var].to_i 

但我只是不斷收到相同的錯誤。

我已經確認：分數是持有一個數字（我仍然得到這個錯誤，如果我手動設置var爲一個數字），但我仍然得到這個錯誤。

數據庫是Postgress。

任何建議非常感謝。

傑森

=====================

以下是完整的錯誤消息：

PG::DatatypeMismatch: ERROR: column "score" is of type integer but expression is of type text at character 98 HINT: You will need to rewrite or cast the expression. : INSERT INTO "scorecard_scores" ("created_at", "score", "scorecard_id", "updated_at") VALUES ($1, $2, $3, $4) RETURNING "id" 

這裏全跡：

activerecord (4.0.0) lib/active_record/connection_adapters/postgresql_adapter.rb:780:in `get_last_result' 
activerecord (4.0.0) lib/active_record/connection_adapters/postgresql_adapter.rb:780:in `exec_cache' 
activerecord (4.0.0) lib/active_record/connection_adapters/postgresql/database_statements.rb:139:in `block in exec_query' 
activerecord (4.0.0) lib/active_record/connection_adapters/abstract_adapter.rb:425:in `block in log' 
activesupport (4.0.0) lib/active_support/notifications/instrumenter.rb:20:in `instrument' 
activerecord (4.0.0) lib/active_record/connection_adapters/abstract_adapter.rb:420:in `log' 
activerecord (4.0.0) lib/active_record/connection_adapters/postgresql/database_statements.rb:137:in `exec_query' 
activerecord (4.0.0) lib/active_record/connection_adapters/postgresql/database_statements.rb:183:in `exec_insert' 
activerecord (4.0.0) lib/active_record/connection_adapters/abstract/database_statements.rb:96:in `insert' 
activerecord (4.0.0) lib/active_record/connection_adapters/abstract/query_cache.rb:14:in `insert' 
activerecord (4.0.0) lib/active_record/relation.rb:76:in `insert' 
activerecord (4.0.0) lib/active_record/persistence.rb:498:in `create_record' 
activerecord (4.0.0) lib/active_record/attribute_methods/dirty.rb:78:in `create_record' 
activerecord (4.0.0) lib/active_record/callbacks.rb:303:in `block in create_record' 
activesupport (4.0.0) lib/active_support/callbacks.rb:373:in `_run__506216057516292564__create__callbacks' 
activesupport (4.0.0) lib/active_support/callbacks.rb:80:in `run_callbacks' 
activerecord (4.0.0) lib/active_record/callbacks.rb:303:in `create_record' 
activerecord (4.0.0) lib/active_record/timestamp.rb:57:in `create_record' 
activerecord (4.0.0) lib/active_record/persistence.rb:466:in `create_or_update' 
activerecord (4.0.0) lib/active_record/callbacks.rb:299:in `block in create_or_update' 
activesupport (4.0.0) lib/active_support/callbacks.rb:383:in `_run__506216057516292564__save__callbacks' 
activesupport (4.0.0) lib/active_support/callbacks.rb:80:in `run_callbacks' 
activerecord (4.0.0) lib/active_record/callbacks.rb:299:in `create_or_update' 
activerecord (4.0.0) lib/active_record/persistence.rb:106:in `save' 
activerecord (4.0.0) lib/active_record/validations.rb:51:in `save' 
activerecord (4.0.0) lib/active_record/attribute_methods/dirty.rb:32:in `save' 
activerecord (4.0.0) lib/active_record/transactions.rb:270:in `block (2 levels) in save' 
activerecord (4.0.0) lib/active_record/transactions.rb:326:in `block in with_transaction_returning_status' 
activerecord (4.0.0) lib/active_record/connection_adapters/abstract/database_statements.rb:200:in `transaction' 
activerecord (4.0.0) lib/active_record/transactions.rb:209:in `transaction' 
activerecord (4.0.0) lib/active_record/transactions.rb:323:in `with_transaction_returning_status' 
activerecord (4.0.0) lib/active_record/transactions.rb:270:in `block in save' 
activerecord (4.0.0) lib/active_record/transactions.rb:281:in `rollback_active_record_state!' 
activerecord (4.0.0) lib/active_record/transactions.rb:269:in `save' 
activerecord (4.0.0) lib/active_record/associations/has_many_association.rb:39:in `insert_record' 
activerecord (4.0.0) lib/active_record/associations/collection_association.rb:463:in `block (2 levels) in create_record' 
activerecord (4.0.0) lib/active_record/associations/collection_association.rb:367:in `add_to_target' 
activerecord (4.0.0) lib/active_record/associations/collection_association.rb:461:in `block in create_record' 
activerecord (4.0.0) lib/active_record/associations/collection_association.rb:152:in `block in transaction' 
activerecord (4.0.0) lib/active_record/connection_adapters/abstract/database_statements.rb:202:in `block in transaction' 
activerecord (4.0.0) lib/active_record/connection_adapters/abstract/database_statements.rb:210:in `within_new_transaction' 
activerecord (4.0.0) lib/active_record/connection_adapters/abstract/database_statements.rb:202:in `transaction' 
activerecord (4.0.0) lib/active_record/transactions.rb:209:in `transaction' 
activerecord (4.0.0) lib/active_record/associations/collection_association.rb:151:in `transaction' 
activerecord (4.0.0) lib/active_record/associations/collection_association.rb:460:in `create_record' 
activerecord (4.0.0) lib/active_record/associations/collection_association.rb:121:in `create' 
activerecord (4.0.0) lib/active_record/associations/collection_proxy.rb:260:in `create' 
app/controllers/scorecard_controller.rb:17:in `block in create' 
activerecord (4.0.0) lib/active_record/relation/delegation.rb:13:in `each' 
activerecord (4.0.0) lib/active_record/relation/delegation.rb:13:in `each' 
app/controllers/scorecard_controller.rb:14:in `create' 
actionpack (4.0.0) lib/action_controller/metal/implicit_render.rb:4:in `send_action' 
actionpack (4.0.0) lib/abstract_controller/base.rb:189:in `process_action' 
actionpack (4.0.0) lib/action_controller/metal/rendering.rb:10:in `process_action' 
actionpack (4.0.0) lib/abstract_controller/callbacks.rb:18:in `block in process_action' 
activesupport (4.0.0) lib/active_support/callbacks.rb:413:in `_run__2842308223683398234__process_action__callbacks' 
activesupport (4.0.0) lib/active_support/callbacks.rb:80:in `run_callbacks' 
actionpack (4.0.0) lib/abstract_controller/callbacks.rb:17:in `process_action' 
actionpack (4.0.0) lib/action_controller/metal/rescue.rb:29:in `process_action' 
actionpack (4.0.0) lib/action_controller/metal/instrumentation.rb:31:in `block in process_action' 
activesupport (4.0.0) lib/active_support/notifications.rb:159:in `block in instrument' 
activesupport (4.0.0) lib/active_support/notifications/instrumenter.rb:20:in `instrument' 
activesupport (4.0.0) lib/active_support/notifications.rb:159:in `instrument' 
actionpack (4.0.0) lib/action_controller/metal/instrumentation.rb:30:in `process_action' 
actionpack (4.0.0) lib/action_controller/metal/params_wrapper.rb:245:in `process_action' 
activerecord (4.0.0) lib/active_record/railties/controller_runtime.rb:18:in `process_action' 
actionpack (4.0.0) lib/abstract_controller/base.rb:136:in `process' 
actionpack (4.0.0) lib/abstract_controller/rendering.rb:44:in `process' 
actionpack (4.0.0) lib/action_controller/metal.rb:195:in `dispatch' 
actionpack (4.0.0) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch' 
actionpack (4.0.0) lib/action_controller/metal.rb:231:in `block in action' 
actionpack (4.0.0) lib/action_dispatch/routing/route_set.rb:80:in `call' 
actionpack (4.0.0) lib/action_dispatch/routing/route_set.rb:80:in `dispatch' 
actionpack (4.0.0) lib/action_dispatch/routing/route_set.rb:48:in `call' 
actionpack (4.0.0) lib/action_dispatch/journey/router.rb:71:in `block in call' 
actionpack (4.0.0) lib/action_dispatch/journey/router.rb:59:in `each' 
actionpack (4.0.0) lib/action_dispatch/journey/router.rb:59:in `call' 
actionpack (4.0.0) lib/action_dispatch/routing/route_set.rb:655:in `call' 
rack (1.5.2) lib/rack/etag.rb:23:in `call' 
rack (1.5.2) lib/rack/conditionalget.rb:35:in `call' 
rack (1.5.2) lib/rack/head.rb:11:in `call' 
actionpack (4.0.0) lib/action_dispatch/middleware/params_parser.rb:27:in `call' 
actionpack (4.0.0) lib/action_dispatch/middleware/flash.rb:241:in `call' 
rack (1.5.2) lib/rack/session/abstract/id.rb:225:in `context' 
rack (1.5.2) lib/rack/session/abstract/id.rb:220:in `call' 
actionpack (4.0.0) lib/action_dispatch/middleware/cookies.rb:486:in `call' 
activerecord (4.0.0) lib/active_record/query_cache.rb:36:in `call' 
activerecord (4.0.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:626:in `call' 
activerecord (4.0.0) lib/active_record/migration.rb:369:in `call' 
actionpack (4.0.0) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call' 
activesupport (4.0.0) lib/active_support/callbacks.rb:373:in `_run__2239646144333399607__call__callbacks' 
activesupport (4.0.0) lib/active_support/callbacks.rb:80:in `run_callbacks' 
actionpack (4.0.0) lib/action_dispatch/middleware/callbacks.rb:27:in `call' 
actionpack (4.0.0) lib/action_dispatch/middleware/reloader.rb:64:in `call' 
actionpack (4.0.0) lib/action_dispatch/middleware/remote_ip.rb:76:in `call' 
actionpack (4.0.0) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call' 
actionpack (4.0.0) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call' 
railties (4.0.0) lib/rails/rack/logger.rb:38:in `call_app' 
railties (4.0.0) lib/rails/rack/logger.rb:21:in `block in call' 
activesupport (4.0.0) lib/active_support/tagged_logging.rb:67:in `block in tagged' 
activesupport (4.0.0) lib/active_support/tagged_logging.rb:25:in `tagged' 
activesupport (4.0.0) lib/active_support/tagged_logging.rb:67:in `tagged' 
railties (4.0.0) lib/rails/rack/logger.rb:21:in `call' 
actionpack (4.0.0) lib/action_dispatch/middleware/request_id.rb:21:in `call' 
rack (1.5.2) lib/rack/methodoverride.rb:21:in `call' 
rack (1.5.2) lib/rack/runtime.rb:17:in `call' 
activesupport (4.0.0) lib/active_support/cache/strategy/local_cache.rb:83:in `call' 
rack (1.5.2) lib/rack/lock.rb:17:in `call' 
actionpack (4.0.0) lib/action_dispatch/middleware/static.rb:64:in `call' 
railties (4.0.0) lib/rails/engine.rb:511:in `call' 
railties (4.0.0) lib/rails/application.rb:97:in `call' 
rack (1.5.2) lib/rack/lock.rb:17:in `call' 
rack (1.5.2) lib/rack/content_length.rb:14:in `call' 
rack (1.5.2) lib/rack/handler/webrick.rb:60:in `service' 
/Users/jason/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/webrick/httpserver.rb:138:in `service' 
/Users/jason/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/webrick/httpserver.rb:94:in `run' 
/Users/jason/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/webrick/server.rb:295:in `block in start_thread' 

Answer 1

我發現了這個問題。

當我最初創建遷移時，此字段爲文本類型。然後我做了db：rollback，並重新運行它，這個字段是一個整數。儘管我重新進行了遷移，但Rails仍然一直將其視爲文本。

我所需要做的就是重新啓動rails服務器，並且一切正常。