How can concat nested div tag in rails

Question

I try to concat nested div tag in rails.

foo = ''
foo.concat content_tag :div do 
  label_tag 'bar' 
end
=> "<div></div>"

But it always returns div tag without inner tag.

Why did happened?

Answer 1

Due to ruby scoping complete block passed to concat not content_tag separately. You can concat returned string using + operator. Try below code.

foo = ''
foo += content_tag :div do 
  label_tag 'bar' 
end
=> "<div><label for="bar">Bar</label></div>"