bookshelf.js:一对多关系设置

我在用MySQL的ORM使用书架。我有终点站和组织。每个端点都属于一个组织,并且一个组织有许多端点。我正在尝试获取与其关联组织的终结点列表。这将返回以下错误:

“必须为Endpoint BelongsTo关系定义有效的目标模型”

这是我的fetchall请求:

Endpoint
            .where('organization_id', req.user.attributes.organization_id)
            .fetchAll({require: true,withRelated: ['settings', 'organization']})
            .then((endpoints) => {
                ReS(res, {
                    endpoints
                }, 200);
            })

这是我的端点模型:

'use strict';

const bookshelf = require('../config/bookshelf_instance');
const Organization = require('./organization');
const Settings = require('./endpoint_settings');
const Group = require('./endpoint_group');

module.exports = bookshelf.Model.extend({
    tableName: 'endpoint',
    organization () {
        return this.belongsTo(Organization, 'id');
    },
    settings () {
        return this.hasOne(Settings, 'id');
    },
    group () {
        return this.belongsToMany(Group, 'map_endpoint_endpoint_group');
    }
});

这是我的组织模式:

'use strict';

const bookshelf = require('../config/bookshelf_instance');
const Endpoint = require('./endpoint');
const User = require('./user');
const Group = require('./endpoint_group');

module.exports = bookshelf.Model.extend({
    tableName: 'organization',
    endpoints () {
        return this.hasMany(Endpoint, 'organization_id');
    },
    users () {
        return this.hasMany(User, 'organization_id');
    },
    groups () {
        return this.hasMany(Group, 'organization_id');
    }
});