轨道4 ActiveRecord的类型错误无不是一个符号 [英] rails 4 activerecord TypeError nil is not a symbol
本文介绍了轨道4 ActiveRecord的类型错误无不是一个符号的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
它出现在SQL Server中的表被放置零 select语句。我不知道如何解决这个问题，如果我切换到任何其他表，我可以很容易地获得的第一个记录。有没有其他人处理了这个错误？我把表拆开，建成了看法。它仍然做的。我很犹豫猴子补丁这一点。想法？我如何挂钩到SQL Server：
我的模型：
类交易＆LT;的ActiveRecord :: Base的
self.table_name ='vwStorePromosExtSummaryGlobal
结束
我的控制器：
类V1 :: DealsController＆LT;的ApplicationController
高清by_mall_id
交易= Deal.where（mallid：PARAMS [：ID]）
渲染JSON：交易
结束
结束
＃使用SQLSERVER作为数据库的活动记录
创业板tiny_tds，GT〜＆; 0.6.1
宝石的ActiveRecord - SQLSERVER适配器，github上：arthrex / ActiveRecord的-SQLSERVER适配器
创业板active_model_serializers，GT〜＆; 0.8.1
当我敲开了宝石确切的错误我看到：
97：DEF serializable_hash（选项=无）
98：选项|| = {}
99：
100：attribute_names = attributes.keys
101：如果只=选项[：只有]
102：attribute_names和放大器; =阵列（只）.MAP（安培;：to_s）
103：ELSIF除=选项[：除了]
104：attribute_names - =阵列（除）.MAP（安培;：to_s）
105：结束
106：
107：哈希值= {}
108：
=＆GT; 109：binding.pry
110：
111：attribute_names.each {| N |哈希[N] = read_attribute_for_serialization（N）}
112：
113：阵列（选项[：方法]）{每次| M |。散列[m.to_s] =发送（m）如的respond_to？（米）}
114：
115：serializable_add_includes（选项）办|协会，记录，选择采用|
116：哈希[association.to_s] =如果records.respond_to？（：to_ary）
117：records.to_ary.map {| A | a.serializable_hash（选）}
118：其它
119：records.serializable_hash（选）
120：结束
121：结束
122：
123：哈希
124：结束
[1]撬（＃＆LT;应对＆GT;）＆GT; p attribute_names.each
＃＆LT;调查员：mallid，零]：每个＆GT;
=＆GT; ＃＆LT;枚举：...＆GT;
[2]撬（＃＆其中;应对＆GT）＆GT; p attribute_names
[mallid，零]
=＆GT; [mallid，零]
[3]撬（＃＆其中;应对＆GT）＆GT;
这是我的全部跟踪：
[1分[36mSQL（49.6ms）[0分[1mUSE [pcmenu] [0米
处理由V1 :: DealsController＃by_mall_id为JSON
参数：{ID=＆gt;中1066}
[1分[35mDeal负载（44.5ms）0米EXEC sp_executesql的N'SELECT TOP（1）mallid FROM [StorePromosExtSummaryGlobal]，其中[StorePromosExtSummaryGlobal]。[mallid] = N''1066''AND（salestypeid = 11
与calcendDate＆GT; '09 -09-2013''
与displayDate＆LT; '09 -09-2013''
AND（promoType为空或promoType = 0））ORDER BY显示名ASC
在546ms完成500内部服务器错误
类型错误 - 无不是一个符号：
activemodel的（4.0.0）的lib / active_model / serialization.rb：108：在'块serializable_hash
activemodel的（4.0.0）的lib / active_model / serialization.rb：108：在'serializable_hash
ActiveRecord的（4.0.0）的lib / active_record / serialization.rb：17：在'serializable_hash
activemodel的（4.0.0）的lib / active_model /串行器/ json.rb：99：在'as_json
的ActiveSupport（4.0.0）的lib / active_support / JSON / encoding.rb：50：在`块EN code'
的ActiveSupport（4.0.0）的lib / active_support / JSON / encoding.rb：81：在'check_for_circular_references
的ActiveSupport（4.0.0）的lib / active_support / JSON / encoding.rb：49：在`恩code'
的ActiveSupport（4.0.0）的lib / active_support / JSON / encoding.rb：34：在`恩code'
的ActiveSupport（4.0.0）的lib / active_support / core_ext /对象/ to_json.rb：16：在'to_json
ActionPack的（4.0.0）的lib / action_controller /金属/ renderers.rb：90：在'块与＆lt;模块：提炼＆GT;
active_model_serializers（0.8.1）的lib / action_controller / serialization.rb：48：在'_render_option_json
ActionPack的（4.0.0）的lib / action_controller /金属/ renderers.rb：33：`块_handle_render_options
/Users/chrishough/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/set.rb:232:in`每个
ActionPack的（4.0.0）的lib / action_controller /金属/ renderers.rb：30：在'_handle_render_options
ActionPack的（4.0.0）的lib / action_controller /金属/ renderers.rb：26：在'render_to_body
ActionPack的（4.0.0）的lib / abstract_controller / rendering.rb：97：在'渲染'
ActionPack的（4.0.0）的lib / action_controller /金属/ rendering.rb：16：在'渲染'
ActionPack的（4.0.0）的lib / action_controller /金属/ instrumentation.rb：41：在'块（2级）的渲染'
的ActiveSupport（4.0.0）的lib / active_support / core_ext / benchmark.rb：12：在`块毫秒
/Users/chrishough/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/benchmark.rb:296:in'实时'
的ActiveSupport（4.0.0）的lib / active_support / core_ext / benchmark.rb：12：在'MS'
ActionPack的（4.0.0）的lib / action_controller /金属/ instrumentation.rb：41：在'挡在渲染
ActionPack的（4.0.0）的lib / action_controller /金属/ instrumentation.rb：84：在'cleanup_view_runtime
ActiveRecord的（4.0.0）的lib / active_record / railties / controller_runtime.rb：25：在'cleanup_view_runtime
ActionPack的（4.0.0）的lib / action_controller /金属/ instrumentation.rb：40：在'渲染'
应用程序/控制器/ V1 / deals_controller.rb：6：`by_mall_id
apipie护栏（0.0.22）的lib / apipie / dsl_definition.rb：193：在'块_apipie_define_validators
ActionPack的（4.0.0）的lib / action_controller /金属/ implicit_render.rb：4：`send_action
ActionPack的（4.0.0）的lib / abstract_controller / base.rb：189：在'process_action
ActionPack的（4.0.0）的lib / action_controller /金属/ rendering.rb：10：`process_action
ActionPack的（4.0.0）的lib / abstract_controller / callbacks.rb：18：在`块process_action
的ActiveSupport（4.0.0）的lib / active_support / callbacks.rb：383：在'_run__408012802371174283__process_action__callbacks
的ActiveSupport（4.0.0）的lib / active_support / callbacks.rb：80：在'run_callbacks
ActionPack的（4.0.0）的lib / abstract_controller / callbacks.rb：17：在'process_action
ActionPack的（4.0.0）的lib / action_controller /金属/ rescue.rb：29：在'process_action
ActionPack的（4.0.0）的lib / action_controller /金属/ instrumentation.rb：31：在`块process_action
的ActiveSupport（4.0.0）的lib / active_support / notifications.rb：159：在'块仪表
的ActiveSupport（4.0.0）的lib / active_support /通知/ instrumenter.rb：20：在'工具'
的ActiveSupport（4.0.0）的lib / active_support / notifications.rb：159：在'工具'
ActionPack的（4.0.0）的lib / action_controller /金属/ instrumentation.rb：30：在'process_action
ActionPack的（4.0.0）的lib / action_controller /金属/ params_wrapper.rb：245：在'process_action
ActiveRecord的（4.0.0）的lib / active_record / railties / controller_runtime.rb：18：在'process_action
ActionPack的（4.0.0）的lib / abstract_controller / base.rb：136：在'过程'
ActionPack的（4.0.0）的lib / abstract_controller / rendering.rb：44：在'过程'
ActionPack的（4.0.0）的lib / action_controller / metal.rb：195：在'调度'
ActionPack的（4.0.0）的lib / action_controller /金属/ rack_delegation.rb：13：在'调度'
ActionPack的（4.0.0）的lib / action_controller / metal.rb：231：在'挡在行动
ActionPack的（4.0.0）的lib / action_dispatch /路由/ route_set.rb：80：在'调度'
ActionPack的（4.0.0）的lib / action_dispatch /路由/ route_set.rb：48：在'叫'
ActionPack的（4.0.0）的lib / action_dispatch /旅程/ router.rb：71：在`块调用
ActionPack的（4.0.0）的lib / action_dispatch /旅程/ router.rb：59：在'叫'
ActionPack的（4.0.0）的lib / action_dispatch /路由/ route_set.rb：655：在'叫'
apipie护栏（0.0.22）的lib / apipie / static_dispatcher.rb：56：在'呼'
机架（1.5.2）的lib /架/ etag.rb：23：在'叫'
机架（1.5.2）的lib /架/ conditionalget.rb：25：在'叫'
机架（1.5.2）的lib /架/ head.rb：11：在'叫'
ActionPack的（4.0.0）的lib / action_dispatch /中间件/ params_parser.rb：27：在'呼'
ActionPack的（4.0.0）的lib / action_dispatch /中间件/ flash.rb：241：在'呼'
机架（1.5.2）的lib /架/会话/抽象/ id.rb：225：在'背景'
机架（1.5.2）的lib /架/会话/抽象/ id.rb：220：在'呼'
ActionPack的（4.0.0）的lib / action_dispatch /中间件/ cookies.rb：486：在'呼'
ActiveRecord的（4.0.0）的lib / active_record / query_cache.rb：36：在'呼'
ActiveRecord的（4.0.0）的lib / active_record / connection_adapters /抽象/ connection_pool.rb：626：在'叫'
ActiveRecord的（4.0.0）的lib / active_record / migration.rb：369：在'呼'
ActionPack的（4.0.0）的lib / action_dispatch /中间件/ callbacks.rb：29：在`块调用
的ActiveSupport（4.0.0）的lib / active_support / callbacks.rb：373：在'_run__980017763409925121__call__callbacks
的ActiveSupport（4.0.0）的lib / active_support / callbacks.rb：80：在'run_callbacks
ActionPack的（4.0.0）的lib / action_dispatch /中间件/ callbacks.rb：27：在'呼'
ActionPack的（4.0.0）的lib / action_dispatch /中间件/ reloader.rb：64：在'呼'
ActionPack的（4.0.0）的lib / action_dispatch /中间件/ remote_ip.rb：76：在'呼'
better_errors（0.9.0）的lib / better_errors / middleware.rb：84：在'protected_app_call
better_errors（0.9.0）的lib / better_errors / middleware.rb：79：在'better_errors_call
better_errors（0.9.0）的lib / better_errors / middleware.rb：56：在'叫'
ActionPack的（4.0.0）的lib / action_dispatch /中间件/ debug_exceptions.rb：17：在'呼'
ActionPack的（4.0.0）的lib / action_dispatch /中间件/ show_exceptions.rb：30：在'呼'
railties（4.0.0）的lib /导轨/机架/ logger.rb：38：在'call_app
railties（4.0.0）的lib /导轨/机架/ logger.rb：21：在`块调用
的ActiveSupport（4.0.0）的lib / active_support / tagged_logging.rb：67：在`块标记
的ActiveSupport（4.0.0）的lib / active_support / tagged_logging.rb：25：在'标签'
的ActiveSupport（4.0.0）的lib / active_support / tagged_logging.rb：67：在'标签'
railties（4.0.0）的lib /导轨/机架/ logger.rb：21：在'叫'
ActionPack的（4.0.0）的lib / action_dispatch /中间件/ request_id.rb：21：在'呼'
机架（1.5.2）的lib /架/ methodoverride.rb：21：在'叫'
机架（1.5.2）的lib /架/ runtime.rb：17：在'叫'
的ActiveSupport（4.0.0）的lib / active_support /缓存/策略/ local_cache.rb：83：在'呼'
机架（1.5.2）的lib /架/ lock.rb：17：在'叫'
ActionPack的（4.0.0）的lib / action_dispatch /中间件/ static.rb：64：在'呼'
railties（4.0.0）的lib /导轨/ engine.rb：511：在'叫'
railties（4.0.0）的lib /导轨/ application.rb中：97：在'叫'
机架（1.5.2）的lib /架/ content_length.rb：14：在'叫'
彪马（2.5.1）的lib / PUMA / server.rb：472：在'handle_request
彪马（2.5.1）的lib / PUMA / server.rb：343：在'process_client
彪马（2.5.1）的lib / PUMA / server.rb：242：在'挡在运行
彪马（2.5.1）的lib / PUMA / thread_pool.rb：92：在`块spawn_thread
解决方案
虽然我仍然相信这是活动记录中的错误，我能得到它周围的的 https://github.com/rails-api/active_model_serializers 宝石。这种宝石覆盖to_json不再需要这个错误code的活动记录被调用。
别人有更好的回答？
更新控制器：
类V1 :: DealsController＆LT;的ApplicationController
高清by_mall_id
交易= Deal.where（mallid：PARAMS [：ID]）第一。
渲染JSON：交易，串行：V1 :: DealSerializer
结束
结束
我的新DealSerializer：
类V1 :: DealSerializer＆LT;加载ActiveModel ::串行
属性：MALLID
高清MALLID
object.mallid
结束
结束
It appears a table in sql server is placing nil in the select statement. I have no idea how to fix this, and if I switch to any other table, I can easily acquire the first record. Has anyone else dealt with this bug? I took the table apart and built a view. It still does it. I am hesitant to monkey patch this. Ideas? How I am hooking up to sql server:
My model:
class Deal < ActiveRecord::Base
self.table_name = 'vwStorePromosExtSummaryGlobal'
end
My controller:
class V1::DealsController < ApplicationController
def by_mall_id
deals = Deal.where(mallid: params[:id])
render json: deals
end
end
# Use sqlserver as the database for Active Record
gem 'tiny_tds', '~> 0.6.1'
gem 'activerecord-sqlserver-adapter', github: 'arthrex/activerecord-sqlserver-adapter'
gem 'active_model_serializers', '~> 0.8.1'
When I crack open the exact error in the gem I see:
97: def serializable_hash(options = nil)
98: options ||= {}
99:
100: attribute_names = attributes.keys
101: if only = options[:only]
102: attribute_names &= Array(only).map(&:to_s)
103: elsif except = options[:except]
104: attribute_names -= Array(except).map(&:to_s)
105: end
106:
107: hash = {}
108:
=> 109: binding.pry
110:
111: attribute_names.each { |n| hash[n] = read_attribute_for_serialization(n) }
112:
113: Array(options[:methods]).each { |m| hash[m.to_s] = send(m) if respond_to?(m) }
114:
115: serializable_add_includes(options) do |association, records, opts|
116: hash[association.to_s] = if records.respond_to?(:to_ary)
117: records.to_ary.map { |a| a.serializable_hash(opts) }
118: else
119: records.serializable_hash(opts)
120: end
121: end
122:
123: hash
124: end
[1] pry(#<Deal>)> p attribute_names.each
#<Enumerator: ["mallid", nil]:each>
=> #<Enumerator: ...>
[2] pry(#<Deal>)> p attribute_names
["mallid", nil]
=> ["mallid", nil]
[3] pry(#<Deal>)>
This is my full trace:
[1m[36mSQL (49.6ms)[0m [1mUSE [pcmenu][0m
Processing by V1::DealsController#by_mall_id as JSON
Parameters: {"id"=>"1066"}
[1m[35mDeal Load (44.5ms)[0m EXEC sp_executesql N'SELECT TOP (1) mallid FROM [StorePromosExtSummaryGlobal] WHERE [StorePromosExtSummaryGlobal].[mallid] = N''1066'' AND (salestypeid = 11
AND calcendDate > ''09-09-2013''
AND displayDate < ''09-09-2013''
AND (promoType is null or promoType = 0)) ORDER BY displayName ASC'
Completed 500 Internal Server Error in 546ms
TypeError - nil is not a symbol:
activemodel (4.0.0) lib/active_model/serialization.rb:108:in `block in serializable_hash'
activemodel (4.0.0) lib/active_model/serialization.rb:108:in `serializable_hash'
activerecord (4.0.0) lib/active_record/serialization.rb:17:in `serializable_hash'
activemodel (4.0.0) lib/active_model/serializers/json.rb:99:in `as_json'
activesupport (4.0.0) lib/active_support/json/encoding.rb:50:in `block in encode'
activesupport (4.0.0) lib/active_support/json/encoding.rb:81:in `check_for_circular_references'
activesupport (4.0.0) lib/active_support/json/encoding.rb:49:in `encode'
activesupport (4.0.0) lib/active_support/json/encoding.rb:34:in `encode'
activesupport (4.0.0) lib/active_support/core_ext/object/to_json.rb:16:in `to_json'
actionpack (4.0.0) lib/action_controller/metal/renderers.rb:90:in `block in <module:Renderers>'
active_model_serializers (0.8.1) lib/action_controller/serialization.rb:48:in `_render_option_json'
actionpack (4.0.0) lib/action_controller/metal/renderers.rb:33:in `block in _handle_render_options'
/Users/chrishough/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/set.rb:232:in `each'
actionpack (4.0.0) lib/action_controller/metal/renderers.rb:30:in `_handle_render_options'
actionpack (4.0.0) lib/action_controller/metal/renderers.rb:26:in `render_to_body'
actionpack (4.0.0) lib/abstract_controller/rendering.rb:97:in `render'
actionpack (4.0.0) lib/action_controller/metal/rendering.rb:16:in `render'
actionpack (4.0.0) lib/action_controller/metal/instrumentation.rb:41:in `block (2 levels) in render'
activesupport (4.0.0) lib/active_support/core_ext/benchmark.rb:12:in `block in ms'
/Users/chrishough/.rbenv/versions/2.0.0-p247/lib/ruby/2.0.0/benchmark.rb:296:in `realtime'
activesupport (4.0.0) lib/active_support/core_ext/benchmark.rb:12:in `ms'
actionpack (4.0.0) lib/action_controller/metal/instrumentation.rb:41:in `block in render'
actionpack (4.0.0) lib/action_controller/metal/instrumentation.rb:84:in `cleanup_view_runtime'
activerecord (4.0.0) lib/active_record/railties/controller_runtime.rb:25:in `cleanup_view_runtime'
actionpack (4.0.0) lib/action_controller/metal/instrumentation.rb:40:in `render'
app/controllers/v1/deals_controller.rb:6:in `by_mall_id'
apipie-rails (0.0.22) lib/apipie/dsl_definition.rb:193:in `block in _apipie_define_validators'
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:383:in `_run__408012802371174283__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 `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 `call'
actionpack (4.0.0) lib/action_dispatch/routing/route_set.rb:655:in `call'
apipie-rails (0.0.22) lib/apipie/static_dispatcher.rb:56:in `call'
rack (1.5.2) lib/rack/etag.rb:23:in `call'
rack (1.5.2) lib/rack/conditionalget.rb:25: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__980017763409925121__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'
better_errors (0.9.0) lib/better_errors/middleware.rb:84:in `protected_app_call'
better_errors (0.9.0) lib/better_errors/middleware.rb:79:in `better_errors_call'
better_errors (0.9.0) lib/better_errors/middleware.rb:56: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/content_length.rb:14:in `call'
puma (2.5.1) lib/puma/server.rb:472:in `handle_request'
puma (2.5.1) lib/puma/server.rb:343:in `process_client'
puma (2.5.1) lib/puma/server.rb:242:in `block in run'
puma (2.5.1) lib/puma/thread_pool.rb:92:in `block in spawn_thread'
解决方案
While I still believe this is a bug in active record, I was able to get around it with the https://github.com/rails-api/active_model_serializers gem. This gem overrides to_json eliminated the need for the bug code in active record to be called.
anyone else have a better answer?
Updated Controller:
class V1::DealsController < ApplicationController
def by_mall_id
deals = Deal.where(mallid: params[:id]).first
render json: deals, serializer: V1::DealSerializer
end
end
My new DealSerializer:
class V1::DealSerializer < ActiveModel::Serializer
attributes :MALLID
def MALLID
object.mallid
end
end
这篇关于轨道4 ActiveRecord的类型错误无不是一个符号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！
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