Rails 将变量添加到另一个变量

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.

Answer 1

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)