如何在rails上的ruby中添加前缀并删除双引号？

Question

I have a value called "FooBar" . I want to replace this text with the quotes to Enr::Rds::FooBar without quotes.

Update:

For example, @question.answer_model gives the value "FooBar" (with the quotes)

I am a newbie and somebody please refer me how would i start to know about regex? What is the best way to practice in online?

Answer 1

Since you want to: a) drop the quotes and b) prepend FooBar with Enr::Rds:: , I would suggest you preform exactly what is intended, literally:

'"FooBar"'.delete('"').gsub(/\A/, "Enr::Rds::")
# => "Enr::Rds::FooBar" 

Answer 2

I think you are trying to convert a string to a constant. try the following

"Enr::Rds::#{@question.answer_model.gsub('"', '')}".constantize.find(...)