From: Ryan Williams <ryan@...>
Date: 2006-03-18T04:03:47+09:00
Subject: Re: deleting from hash question

> Just FYI, Rails's dynamic finder methods are probably a little
> cleaner way to do the above:
> 
> find_all_by_person_in(person.id)

Yep. I totally flaked on that. Thanks!

> How about something like:
> 
> todo = Hash[ *TASKS.reject do |name, desc|
>    @current_assignments.any? { |assign| assign.tasks == name }
> end.flatten ]

Okay... this seems to work fine right up to the .flatten
I created a method in my model like so:

def self.get_unassigned(assigned)
    Hash[ *TASKS.reject do |name, desc|
          assigned.any? { |assign| assign.task == name }
          end.flatten ]
end

with "assigned" being @currently_assigned.

Rails is giving me:

NoMethodError in Admin#show

undefined method `flatten' for {"homework"=>"Do Your Homework!"}:Hash

At least it's correctly eleminating the already assigned tasks. Any idea 
why I'm getting thrown this exception on a standard ruby method? It seem 
to happen to me a lot.

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