rails、authlogic and sql error

Question

authlogicを使用して、レールにadmin_nameとパスワードを使用して認証システムを構築しようとしています。私は次のエラーを取得しています：

Mysql::Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') = '[admin_name]') LIMIT 1' at line 1: SELECT admins .* FROM admins WHERE (LOWER(admins .) = '[admin_name]') LIMIT 1

これはadmin_session_controller.rbのコードです...

def login 
    @admin_session = AdminSession.new(params[:admin_session])     
if @admin_session.save 
    flash[:notice] = 'Successfuly logged in.' 
    redirect_to :controller => 'admins', :action => 'email_stats' 
else 
    flash[:notice] = 'Trouble!!' 
    render :action => 'new' 
end 
end 

を、私はそれがparams[:admin_session]を好まないことを推測しているが、私はしないでください本当に理由を知っている。

ERBテンプレート....

<%= render :partial => 'layouts/head_admins' %> 

<div id="notice"> 
<% if flash[:notice] %> 
<%= flash[:notice] %> 
<% end %> 
</div> 

<div id="main" align="middle"> 
    <table> 
    <%= form_for @admin_session, :as => :admin_session, :url => { :action => "login" } do |f| %> 
    <tr class="bold gray">Admin_name</tr> 
    <tr id="login_admin_name"><%= f.text_field :admin_name, :class => "text", :tabindex => "1" %></tr> 
    <tr class="bold gray">Password</tr> 
    <tr id="login_password"><%= f.password_field :password, :class => "password", :tabindex => "2" %></tr> 
    <tr><%= image_submit_tag("login_btn.png", :id => 'login_btn', :class=>"image", :tabindex => "3", :alt => 'Login') %></tr> 
    <tr class="gray"><%= f.check_box :remember_me %>Keep me logged in</tr> 
    <% end %> 
    </table> 
</div> 

これは、エラーログです：

Started POST "/admin_session/login" for 127.0.0.1 at 2011-07-17 19:58:07 -0700 
    Processing by AdminSessionController#login as HTML 
    Parameters: {"utf8"=>"✓", "authenticity_token"=>"[token]", "admin_session"=>{"admin_name"=>"[admin_name]", "password"=>"[FILTERED]"}, "x"=>"35", "y"=>"14"} 
    [1m[36mAdmin Load (136.4ms)[0m [1mSELECT `admins`.* FROM `admins` WHERE (LOWER(`admins`.) = '[admin_name]') LIMIT 1[0m 
Mysql::Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') = '[admin_name]') LIMIT 1' at line 1: SELECT `admins`.* FROM `admins` WHERE (LOWER(`admins`.) = '[admin_name]') LIMIT 1 
Completed in 563ms 

ActiveRecord::StatementInvalid (Mysql::Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') = '[admin_name]') LIMIT 1' at line 1: SELECT `admins`.* FROM `admins` WHERE (LOWER(`admins`.) = '[admin_name]') LIMIT 1): 
    app/controllers/admin_session_controller.rb:18:in `login' 

Rendered /home/tm/.rvm/gems/ruby-1.9.2-p180/gems/actionpack-3.0.3/lib/action_dispatch/middleware/templates/rescues/_trace.erb (1.8ms) 
Rendered /home/tm/.rvm/gems/ruby-1.9.2-p180/gems/actionpack-3.0.3/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (6.7m 

これは完全なトレースである......

activerecord (3.0.3) lib/active_record/connection_adapters/abstract_adapter.rb:202:in `rescue in log' 
activerecord (3.0.3) lib/active_record/connection_adapters/abstract_adapter.rb:194:in `log' 
activerecord (3.0.3) lib/active_record/connection_adapters/mysql_adapter.rb:289:in `execute' 
activerecord (3.0.3) lib/active_record/connection_adapters/mysql_adapter.rb:619:in `select' 
activerecord (3.0.3) lib/active_record/connection_adapters/abstract/database_statements.rb:7:in `select_all' 
activerecord (3.0.3) lib/active_record/connection_adapters/abstract/query_cache.rb:54:in `block in select_all' 
activerecord (3.0.3) lib/active_record/connection_adapters/abstract/query_cache.rb:68:in `cache_sql' 
activerecord (3.0.3) lib/active_record/connection_adapters/abstract/query_cache.rb:54:in `select_all' 
activerecord (3.0.3) lib/active_record/base.rb:467:in `find_by_sql' 
activerecord (3.0.3) lib/active_record/relation.rb:64:in `to_a' 
activerecord (3.0.3) lib/active_record/relation/finder_methods.rb:333:in `find_first' 
activerecord (3.0.3) lib/active_record/relation/finder_methods.rb:122:in `first' 
activerecord (3.0.3) lib/active_record/relation/finder_methods.rb:119:in `first' 
activerecord (3.0.3) lib/active_record/base.rb:439:in `first' 
/home/tm/.rvm/gems/ruby-1.9.2-p180/bundler/gems/authlogic-a087ad0cba3c/lib/authlogic/acts_as_authentic/login.rb:121:in `find_with_case' 
/home/tm/.rvm/gems/ruby-1.9.2-p180/bundler/gems/authlogic-a087ad0cba3c/lib/authlogic/acts_as_authentic/login.rb:112:in `find_by_smart_case_login_field' 
/home/tm/.rvm/gems/ruby-1.9.2-p180/bundler/gems/authlogic-a087ad0cba3c/lib/authlogic/session/scopes.rb:95:in `block in search_for_record' 
activerecord (3.0.3) lib/active_record/base.rb:1121:in `with_scope' 
/home/tm/.rvm/gems/ruby-1.9.2-p180/bundler/gems/authlogic-a087ad0cba3c/lib/authlogic/session/scopes.rb:94:in `search_for_record' 
/home/tm/.rvm/gems/ruby-1.9.2-p180/bundler/gems/authlogic-a087ad0cba3c/lib/authlogic/session/password.rb:183:in `validate_by_password' 
activesupport (3.0.3) lib/active_support/callbacks.rb:415:in `_run_validate_callbacks' 
activesupport (3.0.3) lib/active_support/callbacks.rb:93:in `run_callbacks' 
/home/tm/.rvm/gems/ruby-1.9.2-p180/bundler/gems/authlogic-a087ad0cba3c/lib/authlogic/session/callbacks.rb:87:in `validate' 
/home/tm/.rvm/gems/ruby-1.9.2-p180/bundler/gems/authlogic-a087ad0cba3c/lib/authlogic/session/validation.rb:64:in `valid?' 
/home/tm/.rvm/gems/ruby-1.9.2-p180/bundler/gems/authlogic-a087ad0cba3c/lib/authlogic/session/existence.rb:65:in `save' 
app/controllers/admin_session_controller.rb:19:in `login' 
actionpack (3.0.3) lib/action_controller/metal/implicit_render.rb:4:in `send_action' 
actionpack (3.0.3) lib/abstract_controller/base.rb:151:in `process_action' 
actionpack (3.0.3) lib/action_controller/metal/rendering.rb:11:in `process_action' 
actionpack (3.0.3) lib/abstract_controller/callbacks.rb:18:in `block in process_action' 
activesupport (3.0.3) lib/active_support/callbacks.rb:445:in `_run__640502527__process_action__573632350__callbacks' 
activesupport (3.0.3) lib/active_support/callbacks.rb:409:in `_run_process_action_callbacks' 
activesupport (3.0.3) lib/active_support/callbacks.rb:93:in `run_callbacks' 
actionpack (3.0.3) lib/abstract_controller/callbacks.rb:17:in `process_action' 
actionpack (3.0.3) lib/action_controller/metal/instrumentation.rb:30:in `block in process_action' 
activesupport (3.0.3) lib/active_support/notifications.rb:52:in `block in instrument' 
activesupport (3.0.3) lib/active_support/notifications/instrumenter.rb:21:in `instrument' 
activesupport (3.0.3) lib/active_support/notifications.rb:52:in `instrument' 
actionpack (3.0.3) lib/action_controller/metal/instrumentation.rb:29:in `process_action' 
actionpack (3.0.3) lib/action_controller/metal/rescue.rb:17:in `process_action' 
actionpack (3.0.3) lib/abstract_controller/base.rb:120:in `process' 
actionpack (3.0.3) lib/abstract_controller/rendering.rb:40:in `process' 
actionpack (3.0.3) lib/action_controller/metal.rb:138:in `dispatch' 
actionpack (3.0.3) lib/action_controller/metal/rack_delegation.rb:14:in `dispatch' 
actionpack (3.0.3) lib/action_controller/metal.rb:178:in `block in action' 
actionpack (3.0.3) lib/action_dispatch/routing/route_set.rb:62:in `call' 
actionpack (3.0.3) lib/action_dispatch/routing/route_set.rb:62:in `dispatch' 
actionpack (3.0.3) lib/action_dispatch/routing/route_set.rb:27:in `call' 
rack-mount (0.6.13) lib/rack/mount/route_set.rb:148:in `block in call' 
rack-mount (0.6.13) lib/rack/mount/code_generation.rb:93:in `block in recognize' 
rack-mount (0.6.13) lib/rack/mount/code_generation.rb:68:in `optimized_each' 
rack-mount (0.6.13) lib/rack/mount/code_generation.rb:92:in `recognize' 
rack-mount (0.6.13) lib/rack/mount/route_set.rb:139:in `call' 
actionpack (3.0.3) lib/action_dispatch/routing/route_set.rb:492:in `call' 
actionpack (3.0.3) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call' 
actionpack (3.0.3) lib/action_dispatch/middleware/head.rb:14:in `call' 
rack (1.2.1) lib/rack/methodoverride.rb:24:in `call' 
actionpack (3.0.3) lib/action_dispatch/middleware/params_parser.rb:21:in `call' 
actionpack (3.0.3) lib/action_dispatch/middleware/flash.rb:182:in `call' 
actionpack (3.0.3) lib/action_dispatch/middleware/session/abstract_store.rb:149:in `call' 
actionpack (3.0.3) lib/action_dispatch/middleware/cookies.rb:295:in `call' 
activerecord (3.0.3) lib/active_record/query_cache.rb:32:in `block in call' 
activerecord (3.0.3) lib/active_record/connection_adapters/abstract/query_cache.rb:28:in `cache' 
activerecord (3.0.3) lib/active_record/query_cache.rb:12:in `cache' 
activerecord (3.0.3) lib/active_record/query_cache.rb:31:in `call' 
activerecord (3.0.3) lib/active_record/connection_adapters/abstract/connection_pool.rb:353:in `call' 
actionpack (3.0.3) lib/action_dispatch/middleware/callbacks.rb:46:in `block in call' 
activesupport (3.0.3) lib/active_support/callbacks.rb:415:in `_run_call_callbacks' 
actionpack (3.0.3) lib/action_dispatch/middleware/callbacks.rb:44:in `call' 
rack (1.2.1) lib/rack/sendfile.rb:107:in `call' 
actionpack (3.0.3) lib/action_dispatch/middleware/remote_ip.rb:48:in `call' 
actionpack (3.0.3) lib/action_dispatch/middleware/show_exceptions.rb:46:in `call' 
railties (3.0.3) lib/rails/rack/logger.rb:13:in `call' 
rack (1.2.1) lib/rack/runtime.rb:17:in `call' 
activesupport (3.0.3) lib/active_support/cache/strategy/local_cache.rb:72:in `call' 
rack (1.2.1) lib/rack/lock.rb:11:in `block in call' 
<internal:prelude>:10:in `synchronize' 
rack (1.2.1) lib/rack/lock.rb:11:in `call' 
actionpack (3.0.3) lib/action_dispatch/middleware/static.rb:30:in `call' 
railties (3.0.3) lib/rails/application.rb:168:in `call' 
railties (3.0.3) lib/rails/application.rb:77:in `method_missing' 
railties (3.0.3) lib/rails/rack/log_tailer.rb:14:in `call' 
rack (1.2.1) lib/rack/content_length.rb:13:in `call' 
rack (1.2.1) lib/rack/chunked.rb:15:in `call' 
rack (1.2.1) lib/rack/handler/mongrel.rb:67:in `process' 
mongrel (1.2.0.pre2) lib/mongrel.rb:165:in `block in process_client' 
mongrel (1.2.0.pre2) lib/mongrel.rb:164:in `each' 
mongrel (1.2.0.pre2) lib/mongrel.rb:164:in `process_client' 
mongrel (1.2.0.pre2) lib/mongrel.rb:291:in `block (2 levels) in run' 

感謝...

Answer 1

私はあなたは実際に "[admin_name]"をテキストフィールドに入力していませんでしたが、私たちに見せているログを微調整しましたか？

Authlogicにログインフィールドに使用するフィールドを教えていますか？それがデフォルトのものでない限り、生成されたSQLに実際の列名が含まれていない理由を説明することができます。

SELECT `admins`.* FROM `admins` WHERE (LOWER(`admins`.) = '[admin_name]')