foodsoft/app/models/group.rb

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# Groups organize the User.
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# A Member gets the roles from the Group
class Group < ActiveRecord::Base
has_many :memberships, :dependent => :destroy
has_many :users, :through => :memberships
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validates :name, :presence => true, :length => {:in => 1..25}
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attr_reader :user_tokens
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# Returns true if the given user if is an member of this group.
def member?(user)
memberships.find_by_user_id(user.id)
end
# Returns all NONmembers and a checks for possible multiple Ordergroup-Memberships
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def non_members
User.all(:order => 'nick').reject { |u| users.include?(u) }
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end
def user_tokens=(ids)
self.user_ids = ids.split(",")
end
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end