This is more of a design question. I have several places in models were I have records that have only a certain amount of option for them, for example:
Sex: There is only 2 options (male, female)
Level: There is only 3 options (silver, gold, platinum)
Country: There is only a limited amount of countries.
我的问题是，这种记录的正确类型是t.string还是t.integer。
当然，对于t.integer，需要有一个枚举，但在确定类型时确实会加快速度，尽管这会使代码变得更复杂，但这值得优化吗？
只要你把它编入索引，通常优化就没有多大意义。
我一直在使用这个宝石：http://github.com/jeffp/enumerated_attribute超过一年
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