这是我的代码，它针对ldap进行身份验证，然后检查ldap user是否在我的sql数据库中
class SessionsController < ApplicationController
# require 'byebug'
def create
username = params[:nome]
password = params[:password]
byebug
if AuthenticateUser.new(username, password).call
# user = User.create_with(NumeroEmpregado: number)
# user.save
# user2 = User.find_or_create_by(nome: username)
user = User.where("nome = '#{username}'").first
if user.present?
session[:user_id] = user.id
redirect_to '/'
else
user = User.new({NumeroEmpregado: "999", nome: username})
user.save
session[:user_id] = user.id
redirect_to '/'
end
else
flash[:error] = "Erro! nNúmero de Empregado e/ou password incorrecto(a)"
redirect_to '/login'
end
end
end
但是user = User.create不起作用，并且User.where没有用户存在时返回用户存在，我的代码有什么问题？我已经经历了这段代码的各种迭代，但似乎都没有工作，并在第user.save行中出现以下错误
活动记录：：语句在会话控制器中无效#创建 TinyTds：：错误：写入服务器失败：开始事务
完全跟踪错误：
activerecord-sqlserver-adapter (5.0.7) lib/active_record/connection_adapters/sqlserver/database_statements.rb:278:in `execute'
activerecord-sqlserver-adapter (5.0.7) lib/active_record/connection_adapters/sqlserver/database_statements.rb:278:in `raw_connection_do'
activerecord-sqlserver-adapter (5.0.7) lib/active_record/connection_adapters/sqlserver/database_statements.rb:219:in `block in do_execute'
activerecord (5.0.3) lib/active_record/connection_adapters/abstract_adapter.rb:590:in `block in log'
activesupport (5.0.3) lib/active_support/notifications/instrumenter.rb:21:in `instrument'
activerecord (5.0.3) lib/active_record/connection_adapters/abstract_adapter.rb:583:in `log'
activerecord-sqlserver-adapter (5.0.7) lib/active_record/connection_adapters/sqlserver/database_statements.rb:219:in `do_execute'
activerecord-sqlserver-adapter (5.0.7) lib/active_record/connection_adapters/sqlserver/database_statements.rb:45:in `begin_db_transaction'
activerecord (5.0.3) lib/active_record/connection_adapters/abstract/transaction.rb:133:in `initialize'
activerecord (5.0.3) lib/active_record/connection_adapters/abstract/transaction.rb:158:in `new'
activerecord (5.0.3) lib/active_record/connection_adapters/abstract/transaction.rb:158:in `begin_transaction'
activerecord (5.0.3) lib/active_record/connection_adapters/abstract/transaction.rb:188:in `within_new_transaction'
activerecord (5.0.3) lib/active_record/connection_adapters/abstract/database_statements.rb:232:in `transaction'
activerecord (5.0.3) lib/active_record/transactions.rb:211:in `transaction'
activerecord (5.0.3) lib/active_record/transactions.rb:392:in `with_transaction_returning_status'
activerecord (5.0.3) lib/active_record/transactions.rb:319:in `block in save'
activerecord (5.0.3) lib/active_record/transactions.rb:334:in `rollback_active_record_state!'
activerecord (5.0.3) lib/active_record/transactions.rb:318:in `save'
activerecord (5.0.3) lib/active_record/suppressor.rb:41:in `save'
app/controllers/sessions_controller.rb:22:in `create'
actionpack (5.0.3) lib/action_controller/metal/basic_implicit_render.rb:4:in `send_action'
actionpack (5.0.3) lib/abstract_controller/base.rb:188:in `process_action'
actionpack (5.0.3) lib/action_controller/metal/rendering.rb:30:in `process_action'
actionpack (5.0.3) lib/abstract_controller/callbacks.rb:20:in `block in process_action'
activesupport (5.0.3) lib/active_support/callbacks.rb:126:in `call'
activesupport (5.0.3) lib/active_support/callbacks.rb:126:in `call'
activesupport (5.0.3) lib/active_support/callbacks.rb:506:in `block (2 levels) in compile'
activesupport (5.0.3) lib/active_support/callbacks.rb:455:in `call'
activesupport (5.0.3) lib/active_support/callbacks.rb:455:in `call'
activesupport (5.0.3) lib/active_support/callbacks.rb:101:in `__run_callbacks__'
activesupport (5.0.3) lib/active_support/callbacks.rb:750:in `_run_process_action_callbacks'
activesupport (5.0.3) lib/active_support/callbacks.rb:90:in `run_callbacks'
actionpack (5.0.3) lib/abstract_controller/callbacks.rb:19:in `process_action'
actionpack (5.0.3) lib/action_controller/metal/rescue.rb:20:in `process_action'
actionpack (5.0.3) lib/action_controller/metal/instrumentation.rb:32:in `block in process_action'
activesupport (5.0.3) lib/active_support/notifications.rb:164:in `block in instrument'
activesupport (5.0.3) lib/active_support/notifications/instrumenter.rb:21:in `instrument'
activesupport (5.0.3) lib/active_support/notifications.rb:164:in `instrument'
actionpack (5.0.3) lib/action_controller/metal/instrumentation.rb:30:in `process_action'
actionpack (5.0.3) lib/action_controller/metal/params_wrapper.rb:248:in `process_action'
activerecord (5.0.3) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
actionpack (5.0.3) lib/abstract_controller/base.rb:126:in `process'
actionview (5.0.3) lib/action_view/rendering.rb:30:in `process'
actionpack (5.0.3) lib/action_controller/metal.rb:190:in `dispatch'
actionpack (5.0.3) lib/action_controller/metal.rb:262:in `dispatch'
actionpack (5.0.3) lib/action_dispatch/routing/route_set.rb:50:in `dispatch'
actionpack (5.0.3) lib/action_dispatch/routing/route_set.rb:32:in `serve'
actionpack (5.0.3) lib/action_dispatch/journey/router.rb:39:in `block in serve'
actionpack (5.0.3) lib/action_dispatch/journey/router.rb:26:in `each'
actionpack (5.0.3) lib/action_dispatch/journey/router.rb:26:in `serve'
actionpack (5.0.3) lib/action_dispatch/routing/route_set.rb:725:in `call'
rack (2.0.3) lib/rack/etag.rb:25:in `call'
rack (2.0.3) lib/rack/conditional_get.rb:38:in `call'
rack (2.0.3) lib/rack/head.rb:12:in `call'
rack (2.0.3) lib/rack/session/abstract/id.rb:232:in `context'
rack (2.0.3) lib/rack/session/abstract/id.rb:226:in `call'
actionpack (5.0.3) lib/action_dispatch/middleware/cookies.rb:613:in `call'
activerecord (5.0.3) lib/active_record/migration.rb:553:in `call'
actionpack (5.0.3) lib/action_dispatch/middleware/callbacks.rb:38:in `block in call'
activesupport (5.0.3) lib/active_support/callbacks.rb:97:in `__run_callbacks__'
activesupport (5.0.3) lib/active_support/callbacks.rb:750:in `_run_call_callbacks'
activesupport (5.0.3) lib/active_support/callbacks.rb:90:in `run_callbacks'
actionpack (5.0.3) lib/action_dispatch/middleware/callbacks.rb:36:in `call'
actionpack (5.0.3) lib/action_dispatch/middleware/executor.rb:12:in `call'
actionpack (5.0.3) lib/action_dispatch/middleware/remote_ip.rb:79:in `call'
actionpack (5.0.3) lib/action_dispatch/middleware/debug_exceptions.rb:49:in `call'
web-console (3.5.1) lib/web_console/middleware.rb:135:in `call_app'
web-console (3.5.1) lib/web_console/middleware.rb:28:in `block in call'
web-console (3.5.1) lib/web_console/middleware.rb:18:in `catch'
web-console (3.5.1) lib/web_console/middleware.rb:18:in `call'
actionpack (5.0.3) lib/action_dispatch/middleware/show_exceptions.rb:31:in `call'
railties (5.0.3) lib/rails/rack/logger.rb:36:in `call_app'
railties (5.0.3) lib/rails/rack/logger.rb:24:in `block in call'
activesupport (5.0.3) lib/active_support/tagged_logging.rb:69:in `block in tagged'
activesupport (5.0.3) lib/active_support/tagged_logging.rb:26:in `tagged'
activesupport (5.0.3) lib/active_support/tagged_logging.rb:69:in `tagged'
railties (5.0.3) lib/rails/rack/logger.rb:24:in `call'
sprockets-rails (3.2.0) lib/sprockets/rails/quiet_assets.rb:13:in `call'
actionpack (5.0.3) lib/action_dispatch/middleware/request_id.rb:24:in `call'
rack (2.0.3) lib/rack/method_override.rb:22:in `call'
rack (2.0.3) lib/rack/runtime.rb:22:in `call'
activesupport (5.0.3) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
actionpack (5.0.3) lib/action_dispatch/middleware/executor.rb:12:in `call'
actionpack (5.0.3) lib/action_dispatch/middleware/static.rb:136:in `call'
rack (2.0.3) lib/rack/sendfile.rb:111:in `call'
railties (5.0.3) lib/rails/engine.rb:522:in `call'
puma (3.9.1) lib/puma/configuration.rb:224:in `call'
puma (3.9.1) lib/puma/server.rb:602:in `handle_request'
puma (3.9.1) lib/puma/server.rb:435:in `process_client'
puma (3.9.1) lib/puma/server.rb:299:in `block in run'
puma (3.9.1) lib/puma/thread_pool.rb:120:in `call'
puma (3.9.1) lib/puma/thread_pool.rb:120:in `block in spawn_thread'
在我的 rails 控制台中，它只是说开始事务并给我同样的错误：
irb(main):004:0> username = "nogger"
=> "nogger"
irb(main):005:0> user = User.new({NumeroEmpregado: "999", nome: username})
SQL (0.0ms) USE [sqlserverapp]
=> #<User id: nil, NumeroEmpregado: "999", nome: "nogger", password_digest: nil, created_at: nil, updated_at: nil>
irb(main):006:0> user.save
SQL (0.0ms) BEGIN TRANSACTION
SQL (1.0ms) USE [sqlserverapp]
User Exists (1.0ms) EXEC sp_executesql N'SELECT 1 AS one FROM [users] WHERE [users].[NumeroEmpregado] = @0 COLLATE Latin1_General_CS_AS_WS ORDER BY [users].[id] ASC OFFSET 0 ROWS FETCH NEXT @1 ROWS ONLY', N'@0 nvarchar(max), @1 int', @0 = N'999', @1 = 1 [["NumeroEmpregado", nil], ["LIMIT", nil]]
=> false
user model:
class User < ApplicationRecord
has_secure_password
has_many :sheets
has_many :tarefa
has_many :estatisticas
validates :NumeroEmpregado, uniqueness:true
end
迁移：
class CreateUsers < ActiveRecord::Migration[5.0]
def change
create_table :users do |t|
t.string :NumeroEmpregado
t.string :nome
t.string :password_digest
t.timestamps
end
end
end
从注释中的来回： 看起来唯一性验证行创建了一个无效的 SQL 语句。尝试删除整行。如果这有帮助，我们可以继续弄清楚为什么会发生这种情况。
更多建议：
您应该使用find_by(:nome, username)而不是where
where将始终返回一个非 nil 值(ActiveRecord::Relation(，您需要调用first，而find_by将返回User或nil
然后，您永远不应该将参数插入到 SQL 查询(代码的"'#{username}'"部分(。这是危险的，并且允许SQL注入或参数会破坏您的代码。
然后，您可以使用create!在创建失败时引发异常(并且您需要挽救该异常以处理错误情况(。或者，您可以检查create调用的返回值。
此外，在 ruby 中使用 snake_case 也很常见，因此您应该将NumeroEmpregado属性称为numero_empregado
尝试在新用户记录上设置密码。我发现你定义了
password = params[:password]
并且从未使用过它。