我有轨道上的红宝石项目3.2.14。我有2个表名为“国家”和“用户”。在“用户”表中有FK名为“countries_id”。 的型号我有做表的关系,如: 在countries.rb
我已成立类似的关系:检查模型上的关系表,轨道上的红宝石
class Countries < ActiveRecord::Base
self.primary_key = "id"
has_many :users, :dependent => :destroy # plural
end
,并在像users.rb的:
class Users < ActiveRecord::Base
self.primary_key = "id"
belongs_to :countries,
:class_name => "Countries",
:foreign_key => "countries_id"
end
,当我想查多的关系,这是没.. 我输入轨控制台命令像下面
c=Countries.find_by_id(1)
,然后当我键入命令u=c.users
,我有一些错误 错误:
c=Countries.find_by_id(1)
Countries Load (0.3ms) SELECT `countries`.* FROM `countries` WHERE `countries`.`id` = 1 LIMIT 1
=> #<Countries id: 1, code: "IND", name: "Indonesia", created_at: "2014-02-17 09:18:11", updated_at: "2014-02-17 09:18:11">
1.9.3-p484 :012 > u=c.users
NameError: uninitialized constant Countries::User
from /home/vinra/.rvm/gems/[email protected]/gems/activerecord-3.2.14/lib/active_record/inheritance.rb:111:in `compute_type'
from /home/vinra/.rvm/gems/[email protected]/gems/activerecord-3.2.14/lib/active_record/reflection.rb:172:in `klass'
from /home/vinra/.rvm/gems/[email protected]/gems/activerecord-3.2.14/lib/active_record/associations/association.rb:118:in `klass'
from /home/vinra/.rvm/gems/[email protected]/gems/activerecord-3.2.14/lib/active_record/associations/association.rb:171:in `find_target?'
from /home/vinra/.rvm/gems/[email protected]/gems/activerecord-3.2.14/lib/active_record/associations/collection_association.rb:334:in `load_target'
from /home/vinra/.rvm/gems/[email protected]/gems/activerecord-3.2.14/lib/active_record/associations/collection_proxy.rb:44:in `load_target'
from /home/vinra/.rvm/gems/[email protected]/gems/activerecord-3.2.14/lib/active_record/associations/collection_proxy.rb:87:in `method_missing'
from /home/vinra/.rvm/gems/[email protected]/gems/railties-3.2.14/lib/rails/commands/console.rb:47:in `start'
from /home/vinra/.rvm/gems/[email protected]/gems/railties-3.2.14/lib/rails/commands/console.rb:8:in `start'
from /home/vinra/.rvm/gems/[email protected]/gems/railties-3.2.14/lib/rails/commands.rb:41:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
1.9.3-p484 :013 > ^C
1.9.3-p484 :013 >
我真的跳有人知道我的问题,反正 谢谢你,,我的英语不好:)
请按照钢轨命名约定模型名称不应该复数 –
你是什么意思,,可以更具体吗? –