獲取ActiveRecord :: StatementInvalid：重命名模型後無法找到表格

Question

我之前將我的模型命名爲「Companies」，這不正確。我重命名所有引用，刪除數據庫並重新運行遷移，重新創建所有內容，而不是重命名它。我能看到SQLite的探險家重新「公司」表，但是當我通過IRB運行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>' 

我不知道在哪裏的參考「公司」是來自 - 我無法在項目目錄中找到任何參考。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 

型號：

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 

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

爲什麼還在尋找companies而不是Company？任何幫助都會很棒。

Answer 1

表名ActiveRecord正在尋找模型公司是公司。 Rails使用變換來複制模型的名稱以形成要在數據庫中查詢的表的名稱。如果要重命名錶或必須使用舊數據庫，則可以在模型中使用set_table_name來設置表名。

更新：還有一些其他有用的提示在the rails wiki。