feathersjs/sequelizejs -> MODEL 与 MODEL 没有关联

Question

我在'services'文件夹下有两个文件夹。他们正在单独调用该服务。现在我想扩展一个模型以包括相关模型，这给出了一个错误信息：类型错误：无法读取未定义的属性'Model'

数据库存在，sql服务器，关系也在那里。

文件services\mic\activity\index.js

'use strict';

const service = require('feathers-sequelize');
const activity = require('./activity-model');
const hooks = require('./hooks/index');

module.exports = function () {
    const app = this;

    const options = {
        Model: activity(app.get('mic_sequelize'))
    };

    app.use('/mic/activity', service(options));

    const activityService = app.service('/mic/activity');

    activityService.before(hooks.before);
    activityService.after(hooks.after);
};

文件services\mic\activity\activity-model.js

'use strict';

const Sequelize = require('sequelize');

module.exports = function (sequelize) {
    const activity = sequelize.define('activity', {
        activity_pk: {
            type: Sequelize.INTEGER,
            primaryKey: true,
            autoIncrement: true,
            allowNull: false,
            unique: true
        },
        activity_plan_pk: {
            type: Sequelize.INTEGER,
            allowNull: false,
            unique: false
        },
        change_order_pk: {
            type: Sequelize.INTEGER,
            allowNull: true,
            unique: false
        },
        description: {
            type: Sequelize.STRING(255),
            allowNull: false,
            unique: false
        },
        id: {
            type: Sequelize.STRING(255),
            allowNull: false,
            unique: true
        }
    }, {
        freezeTableName: true,
        paranoid: false,
        timestamps  : false,
        underscored : false,
        tableName: 'Activity',
        classMethods: {
            associate() {
                activity.belongsTo(sequelize.models.activity_plan, {
                    allowNull: true,
                    as: 'activity_plan'
                });
                activity.belongsTo(sequelize.models.change_order, {
                    allowNull: false,
                    as: 'change_order'
                });
            }
        }
    });

    return activity;
};

文件services\mic\activity\hooks\index.js

'use strict';

const globalHooks = require('../../../../hooks');
const hooks = require('feathers-hooks');
const auth = require('feathers-authentication').hooks;

exports.before = {
    all: [],
    find: [
        getRelatedInfo()
    ],
    get: [
        getRelatedInfo()
    ],
    create: [],
    update: [],
    patch: [],
    remove: []
};

exports.after = {
    all: [],
    find: [],
    get: [],
    create: [],
    update: [],
    patch: [],
    remove: []
};


function getRelatedInfo() {
    return function (hook) {
        hook.params.sequelize = {
            attributes: [
                'activity_pk',
                'activity_plan_pk',
                'change_order_pk',
                ['description', 'activity_description'],
                ['id', 'activity_id']
            ],
            include: [
                {
                    model: hook.app.services.activity_plan.Model,
                    as: 'activity_plan',
                    required: false,
                    attributes: [
                        ['description', 'activity_plan_description'],
                        ['id', 'activity_plan_id']
                    ]
                }
            ]
        }
    };
    return Promise.resolve(hook);
}

文件services\mic\activity_plan\index.js

'use strict';

const service = require('feathers-sequelize');
const activity_plan = require('./activity_plan-model');
const hooks = require('./hooks/index');

module.exports = function () {
    const app = this;

    const options = {
        Model: activity_plan(app.get('mic_sequelize'))
    };

    app.use('/mic/activity_plan', service(options));

    const activityplanService = app.service('/mic/activity_plan');

    activityplanService.before(hooks.before);
    activityplanService.after(hooks.after);
};

文件services\mic\activity_plan\activity_plan-model.js

'use strict';

const Sequelize = require('sequelize');

module.exports = function (sequelize) {
    const activity_plan = sequelize.define('activity_plan', {
        activity_plan_pk: {
            type: Sequelize.INTEGER,
            primaryKey: true,
            autoIncrement: true,
            allowNull: false,
            unique: true
        },
        description: {
            type: Sequelize.STRING(255),
            allowNull: false,
            unique: false
        },
        id: {
            type: Sequelize.STRING(255),
            allowNull: false,
            unique: true
        }
    }, {
        freezeTableName: true,
        paranoid: false,
        timestamps  : false,
        underscored : false,
        tableName: 'Activity_Plan',
        classMethods: {
            associate() {
                activity_plan.hasMany(sequelize.models.activity, {
                    as: 'activity_plan',
                    foreignKey: 'activity_plan_pk',
                    targetKey: 'activity_plan_pk'
                });
            }
        }
    });

    return activity_plan;
};

文件service\mic\activity_plan\hooks\index.js

'use strict';

const globalHooks = require('../../../../hooks');
const hooks = require('feathers-hooks');
const auth = require('feathers-authentication').hooks;

exports.before = {
    all: [],
    find: [],
    get: [],
    create: [],
    update: [],
    patch: [],
    remove: []
};

exports.after = {
    all: [],
    find: [],
    get: [],
    create: [],
    update: [],
    patch: [],
    remove: []
};

问题

我认为我的某个地方配置错误。我使用了我自己的一个工作示例应用程序，其中服务没有子文件夹并且关系是相同的。那是有效的。知道问题出在哪里吗？

求解

好的。因此，我将 activity 和 activity_Plan 移回服务的根目录，除了文件位置外，没有更改任何内容。同样的错误。然后我更改了服务的路径（删除了“/mic”），现在我得到 'activity_plan' is not associated with 'activity'.

好的，现在我恢复了我的测试并得到了这一行 model: hook.app.service('/mic/activity_plan').Model。然后我想到了什么。我有自定义主键，所以我需要在 hasMany、belongsTo 部分做一些调查

所以现在我制作了第二个数据库，它是通过 sequelize（表）strangly 制作的，完全相同的问题。

如果我查看这一行 at Model.validateIncludedElement (D:\Workspace\Projects. Live Customers\Mexon Technology\Projects - Mexon\MexonInControl\MultiFunctionalPortal\backend\node_modules\sequelize\lib\model.js:558:11)，然后在它指向的代码中查看，这很可能是我的模型命名与我的代码中的行 model: hook.app.service('/mfp/sys_metadata').Model 相结合的问题.

Answer 1

哦，亲爱的。我完全忘记了在服务子文件夹的 index.js 文件中初始化关联：

 Object.keys(sequelize.models).forEach(function(modelName) {
        if ("associate" in sequelize.models[modelName]) {
            sequelize.models[modelName].associate();
        }
    });

    sequelize.sync(
        {
            force: false
        }
    );

feathersjs/sequelizejs -> MODEL 与 MODEL 没有关联

feathersjs/sequelizejs -> MODEL is not associated with MODEL

sequelize.js

feathersjs