Invoke block in current binding?
Kip Cole
with modifications) that wants to have a method that will temporarily
elevate user privileges like so:
def sudo
saved_current_user = current_user
current_user = admin_user
yield
current_user = saved_current_user
end
And in a method, invoke it with
sudo do
puts "Something done as admin user"
end
However I know this doesn't work because at the time the block is
passed, the binding is fixed to the defining context.
So the question is: what is the right way to achieve the desired result.
Where the desired result is to pass a block to a method to be executed
in a different context, without the caller having to know any of the
implementation details.
Thanks for any help,
--Kip
--
Posted via http://www.ruby-forum.com/.
Joel VanderWerf
> So the question is: what is the right way to achieve the desired result.
> Where the desired result is to pass a block to a method to be executed
> in a different context, without the caller having to know any of the
> implementation details.
What about this?
Context = Struct.new :user
def sudo
context = Context.new
context.user = "admin_user"
yield context
end
outer_context = Context.new
outer_context.user = "normal_user"
puts "I am #{outer_context.user}"
sudo do |context|
puts "I am #{context.user}"
end
--
vjoel : Joel VanderWerf : path berkeley edu : 510 665 3407