31 lines
1.1 KiB
Ruby
31 lines
1.1 KiB
Ruby
# -*- encoding : utf-8 -*-
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class Relation < ActiveRecord::Base
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belongs_to :target, :polymorphic => true
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belongs_to :actor, :polymorphic => true
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ROLES = %w[reader writer admin]
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validates :role, :inclusion => {:in => ROLES}
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# validate { errors.add(:actor, :taken) if Relation.where(:actor_type => self.actor_type, :actor_id => self.actor_id).present? }
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before_validation :add_default_role
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scope :by_user_through_groups, lambda {|u| where("actor_type = 'User' AND actor_id = ? OR actor_type = 'Group' AND actor_id IN (?)", u.id, u.group_ids)}
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scope :by_actor, lambda {|obj| {:conditions => ['actor_id = ? AND actor_type = ?', obj.id, obj.class.to_s]}}
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scope :by_target, lambda {|tar| {:conditions => ['target_id = ? AND target_type = ?', tar.id, tar.class.to_s]}}
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scope :by_role, lambda {|role| {:conditions => ['role = ?', role]}}
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def self.create_with_role(actor, target, role)
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r = self.new
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r.actor = actor
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r.target = target
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r.role = role
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r.save
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end
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protected
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def add_default_role
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self.role = ROLES.first if role.nil? || role.empty?
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end
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end
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