def perform
    assign_id=390
    @participants=[]
    Participant.find_each(:conditions => ["parent_id=?", assign_id] ) do |participant|
        @participants.push(participant.id)
    end
    for participant in @participants
        #find the latest submission
        latest_sub_time=ResubmissionTime.find(:first,:limit =>1, :conditions => ["participant_id =? ",participant] ,:order => "resubmitted_at DESC")
        if(latest_sub_time!=nil)
            latest_sub_time=latest_sub_time.resubmitted_at
        end
        #find all ReviewResponsemaps for this participant
        @response_maps=[]
        #if !team assignment
        ParticipantReviewResponseMap.find_each(:conditions => ["reviewee_id = ? ", participant]) do |response_map|
            if(response_map!=nil)
                @response_maps.push(response_map.id);
            end
        end
        #find all responses for this responsemap
        puts @response_maps
        for response_map in @response_maps
            #need to find the latest review..
            @reviews=Response.find(:all, :limit =>1, :conditions => ["map_id = ?", response_map], :order => ["created_at DESC"])
            latest_review_time=@reviews[0].created_at
            #so we need to check if latest response is valid or not..;
            #check if review date > last submission date? if no then invalid;
            #else this one is valid and all others are invalid..;
            if(latest_review_time < latest_sub_time)
                #invalidate this review.
                #reviews[0].update_attribute(:valid, false);
                puts reviews[0].id
            else
                #this review is valid and all other reviews before this are invalid;
                #reviews[0].update_attribute(:valid, true)
                # for all other reviews mark as false or invalid;#TODO
                puts reviews[0].id
            end
        end

    end
   end