Rails add variable to another variable

Question

I am a bit stuck. And I know there should be an easy solution. So I have this line of code:

  <% if $current_course.claimedreward1 == false%>

and a variable

$number = 1

I am trying to get the 1 replaced by $number

I tried

<% if $current_course.claimedreward+$number == false%>

There must be a super simple way to do this. I found #{} but it only seems to work for strings. I am a bit lost.

Matt · Accepted Answer · 2016-04-19 10:22:50Z

2

You could use send to build a method/attribute name programatically:

<% if $current_course.send("claimedreward#{$number}") == false%>

update_attribute("claimedreward#{$number}", true)
update_attributes("claimedreward#{$number}" => true)

edited Apr 19, 2016 at 10:22

answered Apr 19, 2016 at 10:06

Matt

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2 Comments

M1xelated Over a year ago

what if I want to set it, for example <% $current_course.update_attributes(claimedreward1: true) %>

Matt Over a year ago

@M1xelated Updated answer.

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