Display variable content, not variable name in Ruby on Rails -

i want customize message end user can modify welcome message. like:

welcome #{userinfo["name"]}, out latest member

where userinfo["name"] variable.

i store message on model column called welcomemsj.

then trying display message using model. like:

messages = model.first  puts messages.welcomemessage 

i have output like:

welcome #{userinfo["name"]}, out latest member 

but want display:

welcome emmanuel, out latest member

what's correct syntax this?

thanks in advance.

the liquid template engine created kind of use case. have backend user include special string in double curly braces such {{name}} populate @ render time. example, backend user set welcome message "welcome {{name}}, our latest member." stored in database. assuming current_user variable represents user that's logged in, render customized message following code:

template = liquid::template.parse(messages.welcomemessage)  template.render('name' => current_user.name)               

another, more dangerous strategy use eval interpret string code:

puts eval("\"" + messages.welcomemessage + "\"") 

this isn't recommended because allow malicious user run arbitrary code. using liquid, maintain control of exact value gets used in place of {{name}}.