i want to do
current_user.allow_????? = true
where ????? could be whatever I wanted it to be
I've seen it done before.. just don't remember where, or what the thing is called.
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2 Answers
foo = "bar"
current_user.send("allow_#{foo}=", true)
EDIT:
what you're asking for in the comment is another thing. If you want to grab a constant, you should use for instance
role = "admin"
User.const_get(role)
2 Comments
NullVoxPopuli
this is real slick. What if a want to do something like? current_user.role = User::??????
NullVoxPopuli
That's a "magic method" and you implement the method_missing on your current_user object. Example from Design Patterns
#example method passed into computer builder class
builder.add_dvd_and_harddisk
#or
builder.add_turbo_and_dvd_dvd_and_harddisk
def method_missing(name, *args)
words = name.to_s.split("_")
return super(name, *args) unless words.shift == 'add'
words.each do |word|
#next is same as continue in for loop in C#
next if word == 'and'
#each of the following method calls are a part of the builder class
add_cd if word == 'cd'
add_dvd if word == 'dvd'
add_hard_disk(100000) if word == 'harddisk'
turbo if word == 'turbo'
end
end
2 Comments
Jesse Wolgamott
I like neutrino's method above better; easier to do.
alex.zherdev
actually
method_missing is a different thing altogether. the author wants to call a method of a variable name, and this answer shows a way how to make the object respond to such calls.