19 lines
494 B
Ruby
19 lines
494 B
Ruby
class Membership < ActiveRecord::Base
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belongs_to :user
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belongs_to :group
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before_destroy :check_last_admin
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# messages
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ERR_NO_ADMIN_MEMBER_DELETE = "Mitgliedschaft kann nicht beendet werden. Du bist die letzte Administratorin"
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protected
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# check if this is the last admin-membership and deny
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def check_last_admin
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raise ERR_NO_ADMIN_MEMBER_DELETE if self.group.role_admin? && self.group.memberships.size == 1 && Group.find_all_by_role_admin(true).size == 1
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end
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end
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