CODEWITHSUNDEEP
ruby-on-rails
compsy
compsy

Reputation: 233

Rails what does this line of code doing

Can anybody can explain me this line of code

<% child_nodes = node.is_a?(Department) ? node.offices.where(parent_office_id: nil) : node.branch_offices %>

I am got confused by ? :
what this is called ? :

Upvotes: 0

Views: 52

Answers (3)

Roshan
Roshan

Reputation: 915

It's called ternary operator, which has form condition ? if_true : if_false

You could write it using if and else.

<% 
   if node.is_a?(Department)
     child_nodes = node.offices.where(parent_office_id: nil)
   else
     child_nodes = node.branch_offices
   end 
%>

Upvotes: 1

jljohnstone
jljohnstone

Reputation: 1230

It's a ternary operator. Another way to write this would be:

<%
  if node.is_a?(Department)
    child_nodes = node.offices.where(parent_office_id: nil)
  else
    child_nodes = node.branch_offices
  end
%>

Upvotes: 0

Colton Ulmer
Colton Ulmer

Reputation: 76

So this statement contains a ternary operator: child_nodes = node.is_a?(Department) ?

If it evaluates to true the first condition is executed i.e.: node.offices.where(parent_office_id: nil)

Otherwise this code is ran: node.branch_offices

Hope this helps!

Upvotes: 1

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