它涉及以下AR

class Client < ActiveRecord::Base
    has_many :phone_numbers,:dependent => :destroy
    has_many :email_addresses,:dependent => :destroy
    has_many :user_clients,:dependent => :destroy
    has_many :users,:through => :user_clients 
end

class UserClient  < ActiveRecord::Base
belongs_to :user
belongs_to :client,:dependent => :destroy
has_many :instructions,:dependent => :destroy
end

在客户端实例上执行销毁时,我发出以下错误

@dead_man = Client.find(params[:id])
@dead_man.destroy => uninitialized constant UserClient::Instruction

我真的不知道这个错误来自哪里.任何帮助是极大的赞赏！