Martin Fowler：的确，字典不是“明确的”。不过，如果你往类里添加一个字段，并把这个多出来的值放到字典里的话，不会有什么问题。

Martin Fowler: No a dictionary isn't as explicit, but if you add a field to the class and pump an extra value into the dictionary, it doesn't matter.

youdao

为了让它运转起来，你需要做的只是把“hidden”字段的值改成你网站的域名。

To make it work, all you need to do is change the value of the "hidden" field to your website's domain name.

youdao

这种校验会通过拒绝空值，强迫加上非空[not NULL]字段的约束，但是也只有在这种情况下，你的数据库会拒绝空值。

This new validation will enforce NOT null column constraints by rejecting null values, but only in situations where your database would reject a null value.

youdao