获取ActiveRecord :: StatementInvalid：重命名模型后无法找到表格

Question

我之前将我的模型命名为“Companies”，这不正确。我重命名所有引用，删除数据库并重新运行迁移，重新创建所有内容，而不是重命名它。我能看到SQLite的探险家重新“公司”表，但是当我通过IRB运行Company.new，我得到：

ActiveRecord::StatementInvalid: Could not find table 'companies' 
from /Users/emzy/rails/blah/.bundle/ruby/1.9.1/gems/activerecord-3.0.7/lib/active_record/connection_adapters/sqlite_adapter.rb:295:in `table_structure' 
from /Users/emzy/rails/blah/.bundle/ruby/1.9.1/gems/activerecord-3.0.7/lib/active_record/connection_adapters/sqlite_adapter.rb:186:in `columns' 
from /Users/emzy/rails/blah/.bundle/ruby/1.9.1/gems/activerecord-3.0.7/lib/active_record/base.rb:680:in `columns' 
from /Users/emzy/rails/blah/.bundle/ruby/1.9.1/gems/activerecord-3.0.7/lib/active_record/persistence.rb:284:in `attributes_from_column_definition' 
from /Users/emzy/rails/blah/.bundle/ruby/1.9.1/gems/activerecord-3.0.7/lib/active_record/locking/optimistic.rb:62:in `attributes_from_column_definition' 
from /Users/emzy/rails/blah/.bundle/ruby/1.9.1/gems/activerecord-3.0.7/lib/active_record/base.rb:1395:in `initialize' 
from (irb):1:in `new' 
from (irb):1 
from /Users/emzy/rails/blah/.bundle/ruby/1.9.1/gems/railties-3.0.7/lib/rails/commands/console.rb:44:in `start' 
from /Users/emzy/rails/blah/.bundle/ruby/1.9.1/gems/railties-3.0.7/lib/rails/commands/console.rb:8:in `start' 
from /Users/emzy/rails/blah/.bundle/ruby/1.9.1/gems/railties-3.0.7/lib/rails/commands.rb:23:in `<top (required)>' 
from script/rails:6:in `require' 
from script/rails:6:in `<main>' 

我不知道在哪里的参考“公司”是来自 - 我无法在项目目录中找到任何参考。所有的ymls等都很好看。

控制器：

class CompanyDirectoryController < ApplicationController 
    before_filter :require_admin, :only => [:new, :create, :edit] 
    def new 
    @company = Company.new 
    @company.companylinks.build 
    end 

型号：

class Company < ActiveRecord::Base 
    validates_presence_of :fullname, :detailed_description, :product_info, :cat_tags, :email 
    validates_uniqueness_of :fullname 
    has_many :companylinks, :class_name => 'CompanyLinks', 
          :foreign_key => "pid", 
          :dependent => :destroy 
    has_attached_file :company_photo, 
        :styles => { :medium => "300x300>", 
           :thumb => "100x100>" } 
    attr_accessor :photo_file_name 
    attr_accessor :photo_content_type 
    attr_accessor :photo_file_size 
    attr_accessor :photo_updated_at 

    accepts_nested_attributes_for :companylinks, 
           :allow_destroy => true 
end 

路线： resources :company, :controller => :company_directory

为什么还在寻找companies而不是Company？任何帮助都会很棒。

Answer 1

表名ActiveRecord正在寻找模型公司是公司。 Rails使用变换来复制模型的名称以形成要在数据库中查询的表的名称。如果要重命名表或必须使用旧数据库，则可以在模型中使用set_table_name来设置表名。

更新：还有一些其他有用的提示在the rails wiki。