Case insensitive active record query in rails-4

Question

Currently I am working on a project in rails 4 in which I have a user-page at example.com/username but it only finds the record if i use username in proper case, how can I p

Answer 1

Another option could be:

def self.search(query)
    where("lower(name) LIKE lower(?)", "%#{query}%") 
end

This would work in sqlite or in PostgreSQL.