Rails - 实例：主题在这行代码中意味着什么？
哪里写着：主题，那是做什么的？据我所知 :topic 也可以是 :posts 如果这是你的模型。但为什么具体指定在那里呢？谢谢
def favorable(opts={})
# favorable_type
type = opts[:type] ? opts[:type] : :topic
type = type.to_s.capitalize
Where it says :topic, what is that doing? From what I can understand :topic could also be :posts if that is your model. But why is it specified there exactly? Thanks
def favorable(opts={})
# favorable_type
type = opts[:type] ? opts[:type] : :topic
type = type.to_s.capitalize
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:topic是一个符号，基本上是一个字符串。因此，如果opts哈希中没有:type键，则type = "Topic"。我想他们使用
:topic而不是"Topic"因为opts[:type]会返回一个符号，也许:whatever并且他们希望将 type 设置为“Whatever”。:topicis a symbol, which is basically a string. So, if there's no:typekey in theoptshash,type = "Topic".I suppose they're using
:topicinstead of"Topic"because theopts[:type]would return a symbol, maybe:whateverand they want to set type to"Whatever".