1

これが私のテストモデルコードです:

require 'rubygems'
require 'composite_primary_keys'
class VamTest < ActiveRecord::Base
  set_table_name 'tests'
  set_primary_keys :service, :host
end

これは、次を実行したときに取得するスタック トレースです。

>> VamTest.all
VamTest.all
ArgumentError: wrong # of arguments(0 for 1)
    from C:/jruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:1:in `class_eval'
    from C:/jruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:2232:in `compute_type'
    from C:/jruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/core_ext/kernel/reporting.rb:11:in `silence_warnings'
    from C:/jruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:2230:in `compute_type'
    from C:/jruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:1665:in `instantiate'
    from C:/jruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:664:in `find_by_sql'
    from C:/jruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:664:in `collect!'
    from C:/jruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:664:in `find_by_sql'
    from C:/jruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:1578:in `find_every'
    from C:/jruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:618:in `find'
    from C:/jruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:638:in `all'
    from (irb):2
>>

以下を確認してください。

>> VamTest.find(:first)
VamTest.find(:first)
ArgumentError: wrong # of arguments(0 for 2)
    from C:/jruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:1:in `class_eval'
    from C:/jruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:2232:in `compute_type'
    from C:/jruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/core_ext/kernel/reporting.rb:11:in `silence_warnings'
    from C:/jruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:2230:in `compute_type'
    from C:/jruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:1665:in `instantiate'
    from C:/jruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:664:in `find_by_sql'
    from C:/jruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:664:in `collect!'
    from C:/jruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:664:in `find_by_sql'
    from C:/jruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:1578:in `find_every'
    from C:/jruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:1535:in `find_initial'
    from C:/jruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:616:in `find'
    from (irb):31
>>

モデルの主キーの定義に問題があるように感じますが、それを理解できません。

4

1 に答える 1

0

モデルに名前を付けることが問題の原因であると思われTestます。コンソールを開いて入力しTestます。実際にモデルを見つけている場合は、次のように表示されます。

=> Testid: integer, service: string, host: string, created_at: datetime, updated_at: datetime

ただし、代わりにこれが表示されると思います。

=> Test

使い捨てモデルを次のようなものに変更して、Fooそれがどのようになるかを確認してください。

于 2010-08-24T16:36:18.610 に答える