Unable to obtain status from database

[QQDengWangF]

I created a project using state Machine, the state obtained when preparing to retrieve the state from the database and return it to the front-end is nil. The state field in the database has values, and the following is my definition of the state machine：

state_machine initial: :leader_pending do
    state :leader_pending, :value => 1
    state :it_pending, :value => 2
    state :user_pending, :value => 3
    state :manager_pending, :value => 4
    state :finance_pending, :value => 5

    event :leader_to_process do
        transition :leader_pending => :it_pending
    end

    event :it_to_process do
        transition :it_pending => :user_pending 
    end

    event :user_to_process do
        transition :user_pending => :manager_pending
    end

    event :user_return_process do
        transition :user_pending => :it_pending
    end

    event :manager_to_process do
        transition :manager_pending => :finance_pending
    end

end

[QQDengWangF]

Sorry, I forgot to reference state_ machines-activerecord