尝试在rails中更新我的表时，我收到错误：
undefined method 'each' for "StringHere" :String
此行导致错误：
current_user.events = eventstring
我还试过使用更新方法
current_user.update(events: eventstring)
并收到同样的错误。
这是我的StackTrace
activerecord (4.2.5) lib/active_record/associations/collection_association.rb:365:in `replace'
activerecord (4.2.5) lib/active_record/associations/collection_association.rb:47:in `writer'
activerecord (4.2.5) lib/active_record/associations/builder/association.rb:123:in `events='
activerecord (4.2.5) lib/active_record/attribute_assignment.rb:54:in `public_send'
activerecord (4.2.5) lib/active_record/attribute_assignment.rb:54:in `_assign_attribute'
activerecord (4.2.5) lib/active_record/attribute_assignment.rb:41:in `block in assign_attributes'
activerecord (4.2.5) lib/active_record/attribute_assignment.rb:35:in `each'
activerecord (4.2.5) lib/active_record/attribute_assignment.rb:35:in `assign_attributes'
activerecord (4.2.5) lib/active_record/persistence.rb:251:in `block in update'
activerecord (4.2.5) lib/active_record/transactions.rb:351:in `block in with_transaction_returning_status'
activerecord (4.2.5) lib/active_record/connection_adapters/abstract/database_statements.rb:213:in `block in transaction'
activerecord (4.2.5) lib/active_record/connection_adapters/abstract/transaction.rb:184:in `within_new_transaction'
activerecord (4.2.5) lib/active_record/connection_adapters/abstract/database_statements.rb:213:in `transaction'
activerecord (4.2.5) lib/active_record/transactions.rb:220:in `transaction'
activerecord (4.2.5) lib/active_record/transactions.rb:348:in `with_transaction_returning_status'
activerecord (4.2.5) lib/active_record/persistence.rb:250:in `update'
app/controllers/users_controller.rb:43:in `update'
actionpack (4.2.5) lib/action_controller/metal/implicit_render.rb:4:in `send_action'
actionpack (4.2.5) lib/abstract_controller/base.rb:198:in `process_action'
actionpack (4.2.5) lib/action_controller/metal/rendering.rb:10:in `process_action'
actionpack (4.2.5) lib/abstract_controller/callbacks.rb:20:in `block in process_action'
activesupport (4.2.5) lib/active_support/callbacks.rb:117:in `call'
activesupport (4.2.5) lib/active_support/callbacks.rb:117:in `call'
activesupport (4.2.5) lib/active_support/callbacks.rb:555:in `block (2 levels) in compile'
activesupport (4.2.5) lib/active_support/callbacks.rb:505:in `call'
activesupport (4.2.5) lib/active_support/callbacks.rb:505:in `call'
activesupport (4.2.5) lib/active_support/callbacks.rb:92:in `__run_callbacks__'
activesupport (4.2.5) lib/active_support/callbacks.rb:778:in `_run_process_action_callbacks'
activesupport (4.2.5) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (4.2.5) lib/abstract_controller/callbacks.rb:19:in `process_action'
actionpack (4.2.5) lib/action_controller/metal/rescue.rb:29:in `process_action'
actionpack (4.2.5) lib/action_controller/metal/instrumentation.rb:32:in `block in process_action'
activesupport (4.2.5) lib/active_support/notifications.rb:164:in `block in instrument'
activesupport (4.2.5) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
activesupport (4.2.5) lib/active_support/notifications.rb:164:in `instrument'
actionpack (4.2.5) lib/action_controller/metal/instrumentation.rb:30:in `process_action'
actionpack (4.2.5) lib/action_controller/metal/params_wrapper.rb:250:in `process_action'
activerecord (4.2.5) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
actionpack (4.2.5) lib/abstract_controller/base.rb:137:in `process'
actionview (4.2.5) lib/action_view/rendering.rb:30:in `process'
actionpack (4.2.5) lib/action_controller/metal.rb:196:in `dispatch'
actionpack (4.2.5) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
actionpack (4.2.5) lib/action_controller/metal.rb:237:in `block in action'
actionpack (4.2.5) lib/action_dispatch/routing/route_set.rb:76:in `call'
actionpack (4.2.5) lib/action_dispatch/routing/route_set.rb:76:in `dispatch'
actionpack (4.2.5) lib/action_dispatch/routing/route_set.rb:45:in `serve'
actionpack (4.2.5) lib/action_dispatch/journey/router.rb:43:in `block in serve'
actionpack (4.2.5) lib/action_dispatch/journey/router.rb:30:in `each'
actionpack (4.2.5) lib/action_dispatch/journey/router.rb:30:in `serve'
actionpack (4.2.5) lib/action_dispatch/routing/route_set.rb:817:in `call'
omniauth (1.3.1) lib/omniauth/strategy.rb:186:in `call!'
omniauth (1.3.1) lib/omniauth/strategy.rb:164:in `call'
omniauth (1.3.1) lib/omniauth/builder.rb:63:in `call'
rack (1.6.4) lib/rack/etag.rb:24:in `call'
rack (1.6.4) lib/rack/conditionalget.rb:38:in `call'
rack (1.6.4) lib/rack/head.rb:13:in `call'
actionpack (4.2.5) lib/action_dispatch/middleware/params_parser.rb:27:in `call'
actionpack (4.2.5) lib/action_dispatch/middleware/flash.rb:260:in `call'
rack (1.6.4) lib/rack/session/abstract/id.rb:225:in `context'
rack (1.6.4) lib/rack/session/abstract/id.rb:220:in `call'
actionpack (4.2.5) lib/action_dispatch/middleware/cookies.rb:560:in `call'
activerecord (4.2.5) lib/active_record/query_cache.rb:36:in `call'
activerecord (4.2.5) lib/active_record/connection_adapters/abstract/connection_pool.rb:653:in `call'
activerecord (4.2.5) lib/active_record/migration.rb:377:in `call'
actionpack (4.2.5) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
activesupport (4.2.5) lib/active_support/callbacks.rb:88:in `__run_callbacks__'
activesupport (4.2.5) lib/active_support/callbacks.rb:778:in `_run_call_callbacks'
activesupport (4.2.5) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (4.2.5) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
actionpack (4.2.5) lib/action_dispatch/middleware/reloader.rb:73:in `call'
actionpack (4.2.5) lib/action_dispatch/middleware/remote_ip.rb:78:in `call'
actionpack (4.2.5) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
web-console (2.2.1) lib/web_console/middleware.rb:31:in `call'
actionpack (4.2.5) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
railties (4.2.5) lib/rails/rack/logger.rb:38:in `call_app'
railties (4.2.5) lib/rails/rack/logger.rb:20:in `block in call'
activesupport (4.2.5) lib/active_support/tagged_logging.rb:68:in `block in tagged'
activesupport (4.2.5) lib/active_support/tagged_logging.rb:26:in `tagged'
activesupport (4.2.5) lib/active_support/tagged_logging.rb:68:in `tagged'
railties (4.2.5) lib/rails/rack/logger.rb:20:in `call'
actionpack (4.2.5) lib/action_dispatch/middleware/request_id.rb:21:in `call'
rack (1.6.4) lib/rack/methodoverride.rb:22:in `call'
rack (1.6.4) lib/rack/runtime.rb:18:in `call'
activesupport (4.2.5) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
rack (1.6.4) lib/rack/lock.rb:17:in `call'
actionpack (4.2.5) lib/action_dispatch/middleware/static.rb:116:in `call'
rack (1.6.4) lib/rack/sendfile.rb:113:in `call'
railties (4.2.5) lib/rails/engine.rb:518:in `call'
railties (4.2.5) lib/rails/application.rb:165:in `call'
rack (1.6.4) lib/rack/lock.rb:17:in `call'
rack (1.6.4) lib/rack/content_length.rb:15:in `call'
rack (1.6.4) lib/rack/handler/webrick.rb:88:in `service'
C:/Ruby22-x64/lib/ruby/2.2.0/webrick/httpserver.rb:138:in `service'
C:/Ruby22-x64/lib/ruby/2.2.0/webrick/httpserver.rb:94:in `run'
C:/Ruby22-x64/lib/ruby/2.2.0/webrick/server.rb:294:in `block in start_thread'
我的用户＆＃39;模型：
class User < ActiveRecord::Base
class << self
def from_omniauth(auth_hash)
user = find_or_create_by(uid: auth_hash['uid'], provider: auth_hash['provider'])
user.name = auth_hash['info']['name']
user.location = auth_hash['info']['location']
user.image_url = auth_hash['info']['image']
user.url = auth_hash['info']['urls']['user.provide.capitalize']
user.email = auth_hash['info']['email']
user.school = nil
user.save!
user
end
end
has_many :userevents
has_many :events, :through => :userevents
端
＆＃39;事件＆＃39;模型：
class Event < ActiveRecord::Base
has_many :userevents
has_many :users, :through => :userevents
端
＆＃39; userevent＆＃39;模型：
class Userevent < ActiveRecord::Base
belongs_to :user
belongs_to :event
def self.dedupe
grouped = all.group_by{|ue| [ue.user_id, ue.event_id]}
grouped.values.each do |dupes|
first_one = dupes.shift
dupes.each{|double| double.destroy}
end
end
端
请帮忙！
答案 0 :(得分：0)
您定义了事件（关联），并且您试图在events上确定字符串，从而引发错误。
您无法将字符串分配给关联。如果您在用户模型上创建events字符串列。您应该更改events列名称或更改events关联（has_many）名称。这会产生冲突。