Regex 仅查询整数Rails 2.3

我的环境是带有Rails 2.3.11的Ruby 1.8.7-p358。我试图查询所有

账户

，这些账户的

名字

仅包含数字（它们都是3位整数，即001、143、815等）。我一直在尝试使用此查询：

Account.find(:all, :conditions => ["first_name LIKE ?", "[^0-9][^0-9][^0-9]"])

我得到的回报是

=>[]

如果我只对

NOT LIKE

使用相同的查询，我将获得所有

帐户

，包括

first\u name

为整数的帐户

我还尝试使用：

Account.find(:all, :conditions => ["first_name REGEXP ?", "[^0-9][^0-9][^0-9]"])

但这只会让我：

ActiveRecord::StatementInvalid: PGError: ERROR:  syntax error at or near "REGEXP"
LINE 1: SELECT * FROM "accounts" WHERE (first_name REGEXP '[0-9][0-9...
                                               ^

: SELECT * FROM "accounts" WHERE (first_name REGEXP '[0-9][0-9][0-9]')  ORDER BY first_name ASC
  from /Users/kyle/.rvm/gems/ruby-1.8.7-p358@popcorn_recruiter_portal/gems/activerecord-2.3.11/lib/active_record/connection_adapters/abstract_adapter.rb:227:in `log'
  from /Users/kyle/.rvm/gems/ruby-1.8.7-p358@popcorn_recruiter_portal/gems/activerecord-2.3.11/lib/active_record/connection_adapters/postgresql_adapter.rb:520:in `execute'
  from /Users/kyle/.rvm/gems/ruby-1.8.7-p358@popcorn_recruiter_portal/gems/activerecord-2.3.11/lib/active_record/connection_adapters/postgresql_adapter.rb:1002:in `select_raw'
  from /Users/kyle/.rvm/gems/ruby-1.8.7-p358@popcorn_recruiter_portal/gems/activerecord-2.3.11/lib/active_record/connection_adapters/postgresql_adapter.rb:989:in `select'
  from /Users/kyle/.rvm/gems/ruby-1.8.7-p358@popcorn_recruiter_portal/gems/activerecord-2.3.11/lib/active_record/connection_adapters/abstract/database_statements.rb:7:in `select_all_without_query_cache'
      from /Users/kyle/.rvm/gems/ruby-1.8.7-p358@popcorn_recruiter_portal/gems/activerecord-2.3.11/lib/active_record/connection_adapters/abstract/query_cache.rb:62:in `select_all'
  from /Users/kyle/.rvm/gems/ruby-1.8.7-p358@popcorn_recruiter_portal/gems/activerecord-2.3.11/lib/active_record/base.rb:665:in `find_by_sql'
  from /Users/kyle/.rvm/gems/ruby-1.8.7-p358@popcorn_recruiter_portal/gems/activerecord-2.3.11/lib/active_record/base.rb:1582:in `find_every'
  from /Users/kyle/.rvm/gems/ruby-1.8.7-p358@popcorn_recruiter_portal/gems/activerecord-2.3.11/lib/active_record/base.rb:619:in `find'
  from (irb):189
  from :0

---

不允许使用正则表达式吗？我如何才能找到每个名为三位整数的

帐户
，
运算符不计算正则表达式。在中，您可以同时使用与
类似的
：

select '980' similar to '[0-9][0-9][0-9]';
 ?column? 
----------
 t

或
~
：

select '980' ~ '[0-9][0-9][0-9]';
 ?column? 
----------
 t
(1 row)

啊！还是空的
>>a=Account.find（：all，：conditions=>[“first\u name~？”，“[0-9][0-9][0-9]”]）=>[]>[]>[]a=Account.find（：all，：conditions=>[“first\u name类似？”，“[0-9][0-9][0-9]”）]）=>[/code>@justlike在“[0-9][0-9]”中有一个前导空格，你说得对！类似于
的操作员工作得很好！谢谢