Question

我看到多个表抛出此错误。搜索StackOverflow似乎大多数人的问题都与特定的列缺失相关，但在我的情况下，它试图选择所有内容，即。使用＆＃34; *＆＃34;。

任何人都有见解？

Mysql2::Error: Unknown column 'users.*' in 'field list'

更新

从rails log：

Mysql2::Error: Unknown column 'users.*' in 'field list': SELECT  `users`.`*` FROM `users`  WHERE `users`.`id` = 53  ORDER BY `users`.`id` ASC LIMIT 1

我想出了如何在本地重现这一点，或者至少我认为它可能会如何重现：

2.1.2 :037 > client = Mysql2::Client.new(:host => "localhost", :username => "root",  :password => "root", :database => "development")
 => #<Mysql2::Client:0x007ff45b72dd30 @read_timeout=nil, @query_options={:as=>:hash, :async=>false, :cast_booleans=>false, :symbolize_keys=>false, :database_timezone=>:local, :application_timezone=>nil, :cache_rows=>true, :connect_flags=>2147525125, :cast=>true, :host=>"localhost", :username=>"root", :password=>"root", :database=>"development"}> 
2.1.2 :038 > result = client.query("SELECT `users`.`*` FROM `users` LIMIT 1")
Mysql2::Error: Unknown column 'users.*' in 'field list'
    from (irb):40:in `query'
    from (irb):40
    from /Users/mark/.rvm/gems/ruby-2.1.2/gems/railties-4.1.7/lib/rails/commands/console.rb:90:in `start'
    from /Users/mark/.rvm/gems/ruby-2.1.2/gems/railties-4.1.7/lib/rails/commands/console.rb:9:in `start'
    from /Users/mark/.rvm/gems/ruby-2.1.2/gems/railties-4.1.7/lib/rails/commands/commands_tasks.rb:69:in `console'
    from /Users/mark/.rvm/gems/ruby-2.1.2/gems/railties-4.1.7/lib/rails/commands/commands_tasks.rb:40:in `run_command!'
    from /Users/mark/.rvm/gems/ruby-2.1.2/gems/railties-4.1.7/lib/rails/commands.rb:17:in `<top (required)>'
    from bin/rails:4:in `require'
    from bin/rails:4:in `<main>'

查询：

SELECT `users`.`*` FROM `users` LIMIT 1

当特殊的所有选择器*用引号括起来时，

失败。

SELECT `users`.* FROM `users` LIMIT 1

没有问题。也许这是一个MySQL的东西？无论如何，这些查询都是由ActiveRecord / ActiveModel生成的，所以我可能发现了一个错误。

Mysql2 ::错误：未知列＆＃39;用户。*＆＃39;在＆＃39;字段列表＆＃39;

0 个答案: