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Editorial Team
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Asked: 2026-05-26T05:14:15+00:00

I would like to have the if condition logic like: var == 10 ?

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I would like to have the if condition logic like:

var == 10 ? “10″ : “Not 10″

on Rails VIEW. What I tried is following:

<%= session[:id]=="out"? link_to "Sign in", login_path : link_to "Sign out", logout_path%>

I know it looks odd, and unsurprisingly it does not work. So, if I would like to use ternary if condition on VIEW, what is the correct way to do in my case?

———One more condition———

I would like to have two “link_to” in else condition

—–The error message I got——–

compile error

syntax error, unexpected tSTRING_BEG, expecting kDO or '{' or '('
...ession[:id]=="out" ? link_to "Sign in",
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1 Answer

  1. Editorial Team

    Try this (the only diffrence is a space between " and ? and the use of parentheses)

    <%= session[:id]=="out" ? link_to("Sign in", login_path) : link_to("Sign out", logout_path) %>

    Altough parentheses are optional in Ruby they are needed to maintain operator precedence in some cases.

    IMHO ternary operators are hard to read. You could also do something more verbose:

    <%= link_to("Sign in", login_path) if session[:id] == "out" %>
<%= link_to("Sign out", logout_path) if session[:id] != "out" %>
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