/*
 * favor.js
 */
const {
    Art
} = require('@models/art');
const {
    Sequelize,
    Model
} = require('sequelize');

const {
    sequelize
} = require('@core/db');

const {
    LikeError,
    DisLikeError
} = require('@core/http-exception')
class Favor extends Model {
    static async like(art_id, type, uid) {
        const favor = await Favor.findOne({
            where: {
                art_id,
                type,
                uid
            }
        })
        if (favor) {
            throw new LikeError();
        }
        return sequelize.transaction(async t => {
            await Favor.create({
                art_id,
                type,
                uid
            }, {
                transaction: t
            })
            console.log('%c ? Art: ', 'font-size:20px;background-color: #FFDD4D;color:#fff;', Art);
            const art = await Art.getData(art_id, type, false);
            await art.increment('fav_nums', {
                by: 1,
                transaction: t
            })
        })
    }
    static async disLike(art_id, type, uid) {
        const favor = await Favor.findOne({
            where: {
                art_id,
                type,
                uid
            }
        })
        if (!favor) {
            throw new DisLikeError();
        }
        return sequelize.transaction(async t => {
            await favor.destroy({
                force: true,
                transaction: t
            })
            const art = await Art.getData(art_id, type, false);
            await art.decrement('fav_nums', {
                by: 1,
                transaction: t
            })
        })
    }
    static async userLikeIt(art_id, type, uid) {
        const favor = await Favor.findOne({
            where: {
                uid,
                art_id,
                type
            }
        })
        return favor ? true : false
    }
}
// 业务表
Favor.init({
    uid: Sequelize.INTEGER,
    art_id: Sequelize.INTEGER,
    type: Sequelize.INTEGER
}, {
    sequelize,
    tableName: 'favor'
})

module.exports = {
    Favor
}

/*
 * like.js
 */
const Router = require('koa-router');
const router = new Router({
    prefix: '/v1/like'
});
const {
    Favor
} = require('@models/favor');
const {
    Auth
} = require('@middleware/auth');
const {
    LikeValidator,
} = require('@validator')
const {
    Success
} = require('@core/http-exception')
router.post('/', new Auth().m, async (ctx, next) => {
    const v = await new LikeValidator().validate(ctx, {
        id: 'art_id'
    });
    const art_id = v.get('body.art_id');
    const type = v.get('body.type');
    const uid = ctx.auth.uid;
    await Favor.like(art_id, type, uid)
    throw new Success();

})
router.post('/dislike', new Auth().m, async (ctx, next) => {
    const v = await new LikeValidator().validate(ctx, {
        id: 'art_id'
    });
    const art_id = v.get('body.art_id');
    const type = v.get('body.type');
    const uid = ctx.auth.uid;
    await Favor.disLike(art_id, type, uid)
    throw new Success();

})
module.exports = router;

然后接口调用时报错

TypeError: Cannot read property 'getData' of undefined