无法将名称空间“竞争”用作类型

Question

我正在上课比赛：

    export class Competition {
    competitionName: string;
    game: {};
    competitors: never[];
    winners: never[];
    winningAmount: number;
    competitionStatus: string;
    entryFee: number;
    stages: never[];

    constructor() {
        this.competitionName = "";
        this.game = {};
        this.competitors = [];
        this.winners = [];
        this.winningAmount = 0;
        this.competitionStatus = "";
        this.entryFee = 0;
        this.stages = [];
    }
}

我正在尝试将其用作另一个类中的函数参数，但我一直在获取

  

不能使用名称空间“竞争”作为类型。

这是我在其中使用的功能。

    import mongoose = require('mongoose');

import competition = require('../models/Competition')

exports.update = function (competitionObject: competition, callback) {       CompetitionODM.updateOne(competitionObject,function(err,updatedCompetition) {
        callback(err, updatedCompetition);
    });
};

请问为什么？