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Versions: 9
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Contents
# A Role gives an object (e.g. an User) specific behaviour (or methods).
#
# == Example
#
# module TeamMember
# extend Neo::DCI::Role
#
# def self.assignable_to?(user, team)
# team.member?(user)
# end
#
# def leave_team!(team)
# # ...
# end
# end
#
# class User
# include Neo::DCI::Data
# end
#
# team_member = team.members.first
# team_member.role_as TeamMember
# team_member.leave_team!(team)
#
# non_member = User.find(1)
# non_member.role_as TeamMember # => raises Role::NotAssignable
#
module Neo
module DCI
module Role
# Decides if the role is assignable to +object+.
#
# The decision can determined by +object+ and +params+.
#
# Returns +true+ by default so every +object+ can have that role.
def assignable_to?(object, *params)
true
end
# Hook after a role has been assigned.
#
# Useful for extend the role with other roles.
def role_assigned(object, *params)
end
class NotAssignable < StandardError
attr_reader :role, :object, :params
def initialize(role, object, params)
super "Role #{role} not assignable to #{object} with params #{params.inspect}"
@role = role
@object = object
@params = params
end
end
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems