CODEWITHSUNDEEP
ruby-on-railsruby
andkjaer
andkjaer

Reputation: 4065

rails 3.0.3 check if boolean value is true

I want to check if a value is true or false.

<% if item.active? %>
    <%= image_tag('on.png', :alt => "Active", :border => 0) %>
<% else %> 
    <%= image_tag('off.png', :alt => "Inactive", :border => 0) %>
<% end %>

That doesn't work, but this works?

<% if item.active == true %>
    <%= image_tag('on.png', :alt => "Active", :border => 0) %>
<% else %> 
    <%= image_tag('off.png', :alt => "Inactive", :border => 0) %>
<% end %>

Shouldn't the first method work or am I missing something?

Upvotes: 27

Views: 97359

Answers (3)

gsumk
gsumk

Reputation: 891

The other way is using single line if else

<%= active ? here is your statement for true : here is your statement for false %>

For active? to work there should be an def active? method in your item object.

Upvotes: 0

rwilliams
rwilliams

Reputation: 21487

This should work for you assuming item.active is truly a boolean value. Unless there is a method defined for item.active? your example will only return a no-method error. 

<% if item.active %>
    <%= image_tag('on.png', :alt => "Active", :border => 0) %>
<% else %> 
    <%= image_tag('off.png', :alt => "Inactive", :border => 0) %>
<% end %>

Upvotes: 2

nonopolarity
nonopolarity

Reputation: 150956

if this line works:

if item.active == true

then 

if item.active

will also work. if item.active? works only if there is a method whose name is actually active?, which is usually the convention for naming a method that returns true or false.

Upvotes: 66

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