获得表名的ActiveRecord [英] Get table name from ActiveRecord

问题描述

我用的ActiveRecord :: Base.set_table_name 来对动态创建的ActiveRecord类设置我的表名。现在我需要知道如何在以后获取的价值。 API文档没有提及如何做到的事。此外，我不能导出表的名字从ActiveRecord类的名字，因为他们是有方向性不同于表名。

I used ActiveRecord::Base.set_table_name to set my table name on a dynamically created ActiveRecord class. Now I need to know how to get that value later. The api docs don't mention anything on how to do this. Also, I can't derive the table name off the ActiveRecord class name because they are keyed differently than the table name.

下面是我在做什么一个更好的例子

Here is a better example of what I am doing

table_klass = Class.new(ActiveRecord::Base)
    ActiveRecord::Base.const_set(const_name,table_klass)
    app = @app
    table_klass.class_eval do
      after_save do
        @@channel.push self
      end
      set_table_name t.server_table
      establish_connection(
        :adapter  => "mysql2",
        :host     => app.db_host,
        :username => app.db_user,
        :password => app.db_pass,
        :database => app.db_name
      )
    end

在这种情况下，如果 const_name =测试和数据库名称数据库，应该创建一个类的ActiveRecord :: Base的:: DatabaseTest，它确实的。但是，当我打电话table_name的就可以了，我得到未定义的局部变量或方法。我是否需要调用table_name的上下课？

In this case, if the const_name = Test and the database name is Database it should create a class of ActiveRecord::Base::DatabaseTest, which it does. But when I call table_name on it I get undefined local variable or method. Do I need to call table_name on the class?

更新： 我得到它通过调用工作 instance.class.table_name

Update: I got it working by calling instance.class.table_name

推荐答案

您是否尝试过 table_name的？ 文档。

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