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In rails, I could restrict certain attribute to be unique within scope but pass on nil or blank. How could I ensure uniqueness but pass on certain value?

I encrypted an attribute, so it's not nil anymore. But I do allow nil for this attribute in the model.

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  • What do you mean by "Pass on nil or blank"? Commented Dec 29, 2015 at 19:58
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    Have you seen this question? You should be able to add any conditional logic you need to using if: ->{...}. Commented Dec 29, 2015 at 20:01
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