如何覆盖feathersjs默认的服务方法

我有一个使用feathers generate service命令创build的feathers generate service 。 我想覆盖它的create方法的定义。

这是我的服务课

 /* eslint-disable no-unused-vars */ // Initializes the `userGroup` service on path `/usergroup` const createService = require('feathers-sequelize'); const createModel = require('../../models/user-group.model'); const hooks = require('./user-group.hooks'); const filters = require('./user-group.filters'); const async = require('async'); module.exports = function () { const app = this; const Model = createModel(app); const paginate = app.get('paginate'); const options = { name: 'usergroup', Model, paginate, create: fnCreateGroup // documentation says this allows you to create your own create method }; function fnCreateGroup(data, params) { let json = { done: false }; let permissionIds = Object.keys(data.permissionList), inIds = []; for (let i in permissionIds) { if (data.permissionList[permissionIds[i]]) { inIds.push(parseInt(permissionIds[i])); } } if (inIds.length === 0) { json.cause = 'You must provide the permission List'; return Promise.resolve(json); } async.parallel([ function (cb) { Model.create({ groupName: data.groupName }).then(function (ug) { cb(null, ug); }, function (err) { cb(err, null); }); }, function (cb) { app.models.permissions.findAll({ where: { id: { $in: inIds } } }).then(function (plist) { cb(null, plist); }); } ] , function (err, results) { if (typeof err !== 'undefined' && err !== null) { json.err = err; return Promise.resolve(json); } else { let permissions = results[1], group = results[0]; for (let i = 0; i < permissions.length; i++) { group.addPermission(permissions[i]); } json.done = true; json.id = group.id; return Promise.resolve(json); } }); } // Initialize our service with any options it requires app.use('/usergroup', createService(options)); // Get our initialized service so that we can register hooks and filters let service = app.service('usergroup'); service.hooks(hooks); if (service.filter) { service.filter(filters); } }; 

创build方法的testing显示了原始方法的结果，而不是我的。

我能做什么？

Answer 1

数据库适配器公共API中logging了如何覆盖和扩展现有服务。 您可以通过设置hook.result来使用钩子或扩展现有的ES6类：

 const Service = require( 'feathers-sequelize').Service; class MyService extends Service { create(data, params) { data.created_at = new Date(); return super.create(data, params); } } app.use('/todos', new MyService({ paginate: { default: 2, max: 4 } }));