Use LIKE/regex with variable in mongoid

Question

I\'m trying to find all documents whose text contains the word test. The below works fine:

@tweets = Tweet.any_of({ :text => /.*test.*/ })

H

Answer 1

@tweets = Tweet.any_of({ :text => Regexp.new ("/.*"+searchterm+".*/") })  

is work, but no result

@tweets = Tweet.any_of({ :text => Regexp.new (".*"+searchterm+".*") })

is ok and have result

@tweets = Tweet.any_of({ :text => /.*#{searchterm}.*/ })

is work, no result

My mongoid version is 3.1.3 and ruby version is 1.9.3