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Ruby On Rails:文本形式 - 如何将字段更改为必需?

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Actually, I have a little issue. I have a form where you can pick a name and so on. One is a text field, the other ones are select. I can change text field to required which means that you need to write something into it, but how can I do it with the other ones?Actually, I have a little issue. I have a form




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