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This is one of those things, that maybe so simple I'll never find it because everyone else already knows it.
I've got objects I have to check for nil in my views so I don't dereference a nil:
<%= if tax_payment.user; tax_payment.user.name; end %> Or I could do this variant:
<%= tax_payment.user ? tax_payment.user.name : '' %> So this is ok ... for most languages. But I feel like there must be some bit of shiny ruby or railness I'm still missing if this is the best I can do.
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You can check if an object is nil (null) by calling present? or blank? . @object. present? this will return false if the project is an empty string or nil .
In Ruby, nil is a special value that denotes the absence of any value. Nil is an object of NilClass. nil is Ruby's way of referring to nothing or void.
In Ruby, you can check if an object is nil, just by calling the nil? on the object... even if the object is nil.
Well, nil is a special Ruby object used to represent an “empty” or “default” value. It's also a “falsy” value, meaning that it behaves like false when used in a conditional statement.
What about:
<%= tax_payment.user.name if tax_payment.user %> If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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