Question

Ok i have this in what i have

user.rb //user model

OPTION = ['none', 'all', 'partial']
ANOTHER = ['true', 'false', 'neither']
YET_ANOTHER = ['something', 'another']

application_helper.rb

 def my_method(information, name)
   #this is where i need help
   User::OPTIONS

index.html.erb

my_method('information', :option)
my_method('information', :another)
my_method('information', :yet_another)

How do i in the my_method view helper grab the correct array so for example if i send in

my_method('information', :another)

in the my_method view helper i should execute

   User::ANOTHER

I was thinking i could upcase but how to i execute this ….

I tried this below

User::name.upcase
NoMethodError: undefined method `name' for #<Class:0x000d001078cd9c8>

Answer 1

You just need to do the following.

User.const_get(name.to_s.upcase)

While this works, make sure you aren’t passing user-submitted params into const_get. This would be a security vulnerability, allowing user to essentially execute unintended code. Instead you should simply use a condition.

info = case params[:something]
when 'foo'; User::FOO
when 'bar'; User::BAR
end