ActiveRecord is easy to use and easy to extend.

ActiveRecord易于使用和扩展。

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As you can see, by default the Patient class simply extends ActiveRecord.

可以看到，默认情况下patient类仅仅扩展了ActiveRecord。

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To keep the example simple, ActiveRecord does not actually run the SQL code.

为了让这个示例尽量简单，ActiveRecord并不会实际运行SQL代码。

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It is basically an abstract implementation of the ActiveRecord design pattern.

它基本上是ActiveRecord设计模式的抽象实现。

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With ActiveRecord, you can also nest the: include option, but only one level deep.

通过ActiveRecord，还可以嵌套：include选项，但嵌套深度只有一级。

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In some initialization code, open the ActiveRecord base class and add your acts_as_ module.

在某些初始化代码中，打开ActiveRecord基类并添加acts_as _模块。

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In some initialization code, open the ActiveRecord base class and add your acts_as_ module.

在某些初始化代码中，打开ActiveRecord基类并添加acts_as _模块。

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