--- title: Bitovi Academy - Connection description: Connect the Todo model to the service layer (can-connect) --- - ![AI implementation](https://www.bitovi.com/hubfs/AIConsultingIcon.svg) [AI implementation](https://www.bitovi.com/services/ai-consulting?hsLang=en-us) - ![Systems engineering](https://www.bitovi.com/hubfs/icon%20-%20backend.svg) [Systems engineering](https://www.bitovi.com/services/systems-engineering-consulting?hsLang=en-us) - ![Project management](https://www.bitovi.com/hubfs/icon%20-%20PM.svg) [Project management](https://www.bitovi.com/services/agile-project-management-consulting?hsLang=en-us) - ![Product design](https://www.bitovi.com/hubfs/icon%20-%20design.svg) [Product design](https://www.bitovi.com/services/product-design-consulting?hsLang=en-us) - ![Frontend development](https://www.bitovi.com/hubfs/icon%20-%20frontend.svg) [Frontend development](https://www.bitovi.com/services/frontend-development-consulting?hsLang=en-us) - [View more → ](https://www.bitovi.com/digital-consulting-services?hsLang=en-us) We're Experts in... - [JavaScript](https://www.bitovi.com/services/frontend/javascript-consulting?hsLang=en-us) - [AI training](https://www.bitovi.com/ai-training-for-software-engineers?hsLang=en-us) - [Angular](https://www.bitovi.com/services/frontend/angular-consulting?hsLang=en-us) - [Design Systems](https://www.bitovi.com/services/axure-figma-migration?hsLang=en-us) - [React](https://www.bitovi.com/services/frontend/react-consulting?hsLang=en-us) - [Temporal](https://www.bitovi.com/services/backend/temporal-consulting?hsLang=en-us) - [React Native](https://www.bitovi.com/services/frontend/react-consulting/react-native?hsLang=en-us) - [Node.js](https://www.bitovi.com/services/backend/nodejs-consulting-1?hsLang=en-us) Showcase ![Yum! Brands](https://www.bitovi.com/hubfs/yum-showcase-link-1.png) [View case study](https://www.bitovi.com/en/bitovi-yum-case-study?hsLang=en-us) More Projects - [![Levi's](https://www.bitovi.com/hubfs/levis.svg)](https://www.bitovi.com/web-application-consulting-work/levis-ecommerce-responsive-redesign?hsLang=en-us) - [![Christie's International Real Estate](https://www.bitovi.com/hubfs/christies.svg)](https://design.bitovi.com/christies) - [![BAFS](https://www.bitovi.com/hubfs/bafs.svg)](https://www.bitovi.com/ux-design-consulting/ux-case-studies/bafs-ppp?hsLang=en-us) - [View more → ](https://www.bitovi.com/our-software-consulting-work?hsLang=en-us) Open Source Tools We build powerful tools and open source them to support the community. [See what we've built →](https://www.bitovi.com/open-source?hsLang=en-us) - [![Blog](https://www.bitovi.com/hubfs/icon%20-%20blog.svg) BlogWe post about perfecting software delivery ](https://bitovi.com/blog) - [![Partnerships](https://www.bitovi.com/hubfs/Handshake-1.svg) PartnershipsLearn about Bitovi's technology partners ](https://www.bitovi.com/partnerships?hsLang=en-us) - [![Academy](https://www.bitovi.com/hubfs/limbo/icons/icon-academy.svg) AcademyFree courses to build delivery skills ](https://www.bitovi.com/academy/?hsLang=en-us) - [![Open source tools](https://www.bitovi.com/hubfs/icon%20-%20open%20source.svg) Open source toolsUse our tools or contribute to our open source mission. ](https://www.bitovi.com/open-source?hsLang=en-us) Let's Connect - [![Discord](https://www.bitovi.com/hubfs/DiscordLogo.svg) Discord ](https://discord.gg/J7ejFsZnJ4) - [![LinkedIn](https://www.bitovi.com/hubfs/LinkedinLogo.svg) LinkedIn ](https://www.linkedin.com/company/bitovi/) - [![GitHub](https://www.bitovi.com/hubfs/GithubLogo.svg) GitHub ](https://github.com/bitovi/) ![Eggbot](https://www.bitovi.com/hubfs/build_assets/bitovi-limbo-cms-react/338/js_client_assets/assets/eggbot-LTGhdSGL.png) Name * Work Email * Phone What's your project? Send ### Contact Us (312) 620-0386contact@bitovi.com - [ Advanced JavaScript ](https://www.bitovi.com/academy/learn-advanced-javascript.html?hsLang=en-us) - [ DOM and jQuery ](https://www.bitovi.com/academy/learn-dom-jquery.html?hsLang=en-us) - [ Debug JavaScript ](https://www.bitovi.com/academy/learn-to-debug-javascript.html?hsLang=en-us) - [ Learn TypeScript ](https://www.bitovi.com/academy/learn-typescript.html?hsLang=en-us) - [ Learn React Native ](https://www.bitovi.com/academy/learn-react-native.html?hsLang=en-us) - [ Learn Web Components ](https://www.bitovi.com/academy/learn-web-components.html?hsLang=en-us) - [ Agile Program Management With Jira ](https://www.bitovi.com/academy/learn-agile-program-management-with-jira.html?hsLang=en-us) - [ Learn RxJS ](https://www.bitovi.com/academy/learn-rxjs.html?hsLang=en-us) - [ Giving a Training ](https://www.bitovi.com/academy/training.html?hsLang=en-us) - [ Learn Technology Consulting ](https://www.bitovi.com/academy/learn-technology-consulting.html?hsLang=en-us) - [ Learn React ](https://www.bitovi.com/academy/learn-react.html?hsLang=en-us) - [ Learn NgRx ](https://www.bitovi.com/academy/learn-ngrx.html?hsLang=en-us) - [ Learn Graphql ](https://www.bitovi.com/academy/learn-graphql.html?hsLang=en-us) - [ Learn Docker ](https://www.bitovi.com/academy/learn-docker.html?hsLang=en-us) - [ Learn CanJS ](https://www.bitovi.com/academy/learn-canjs.html?hsLang=en-us) - [ Setup with StealJS ](https://www.bitovi.com/academy/learn-canjs/setup-canjs.html?hsLang=en-us) - [ Define Todo Model ](https://www.bitovi.com/academy/learn-canjs/define-todo.html?hsLang=en-us) - [ Define Todo List ](https://www.bitovi.com/academy/learn-canjs/define-todo-list.html?hsLang=en-us) - [ Render Todos ](https://www.bitovi.com/academy/learn-canjs/render-todos.html?hsLang=en-us) - [ Toggle checkbox ](https://www.bitovi.com/academy/learn-canjs/toggle-event.html?hsLang=en-us) - [ Toggle checkbox ](https://www.bitovi.com/academy/learn-canjs/toggle-data.html?hsLang=en-us) - [ Algebra ](https://www.bitovi.com/academy/learn-canjs/algebra.html?hsLang=en-us) - [ Simulate the service layer ](https://www.bitovi.com/academy/learn-canjs/simulate-service-layer.html?hsLang=en-us) - [ Connection ](https://www.bitovi.com/academy/learn-canjs/connection.html?hsLang=en-us) - [ Connection List ](https://www.bitovi.com/academy/learn-canjs/connection-list.html?hsLang=en-us) - [ Toggle Save ](https://www.bitovi.com/academy/learn-canjs/toggle-save.html?hsLang=en-us) - [ Connection Destroy ](https://www.bitovi.com/academy/learn-canjs/connection-destroy.html?hsLang=en-us) - [ Component Create ](https://www.bitovi.com/academy/learn-canjs/component-create.html?hsLang=en-us) - [ Component Edit ](https://www.bitovi.com/academy/learn-canjs/component-edit.html?hsLang=en-us) - [ Setter Toggle ](https://www.bitovi.com/academy/learn-canjs/setter-toggle.html?hsLang=en-us) - [ Clear All Completed ](https://www.bitovi.com/academy/learn-canjs/clear-all-completed.html?hsLang=en-us) - [ Routing ](https://www.bitovi.com/academy/learn-canjs/routing.html?hsLang=en-us) - [ Learn Angular ](https://www.bitovi.com/academy/learn-angular.html?hsLang=en-us) - [ Advanced TypeScript ](https://www.bitovi.com/academy/advanced-typescript.html?hsLang=en-us) [View More Courses](https://www.bitovi.com/academy/#courses) [ ] # Connection `page` Connect the Todo model to the service layer (can-connect) ## The problem - Decorate `Todo` with methods so it can get, create, updated, and delete todos at the `/api/todos` service. Specifically: - `Todo.getList()` which calls `GET /api/todos` - `Todo.get({id: 5})` which calls `GET /api/todos/5` - `todo.save()` which calls `POST /api/todos` if `todo` doesn’t have an `id` or `PUT /api/todos/{id}` if the `todo` has an id. - `todo.destroy()` which calls `DELETE /api/todos/5` ## What you need to know - [The can-connect Presentation](https://docs.google.com/presentation/d/1ZuxUR9HXKyGqqG9HUQBqwqSJRFG5PJsRMdzZ1-TGAos/edit?usp=sharing#slide=34) up to and including *Migrate 2 can-connect*. - [baseMap](https://canjs.com/doc/can-connect/can/base-map/base-map.html) can decorate a `DefineMap` with methods that connect it to a restful URL like: ``` baseMap({ Map: Type, url: "URL", algebra: algebra }) ``` ## The solution Click to see the solution Update *models/todo.js* to the following: ``` // models/todo.js import {DefineMap, DefineList, realtimeRestModel} from "can"; const Todo = DefineMap.extend("Todo", { id: {type: "string", identity: true}, name: "string", complete: { type: "boolean", default: false }, toggleComplete() { this.complete = !this.complete; } }); Todo.List = DefineList.extend("TodoList", { "#": Todo, get active() { return this.filter({ complete: false }); }, get complete() { return this.filter({ complete: true }); }, get allComplete() { return this.length === this.complete.length; } }); Todo.connection = realtimeRestModel({ url: "/api/todos/{id}", Map: Todo, List: Todo.List }); export default Todo; ``` ###### On this page... ###### Get help If you need [help](https://discord.gg/J7ejFsZnJ4) with an exercise, please reach out to us on [Discord](https://discord.gg/J7ejFsZnJ4) If you find a bug, please [create an issue](https://github.com/bitovi/academy/issues/new) or email [contact@bitovi.com](mailto:contact@bitovi.com?Subject=Training%20Suggestion) ## Join the Bitovi Newsletter Do you want to receive updates about new Bitovi Academy courses, Bitovi open source projects, and dev community news? If so, please provide your email. We won’t spam you or give it away for any reason! *By providing your email you agree to receive communications from Bitovi* ![](https://bitovi.github.io/academy/static/img/close.svg) ```json { "@context": "http://schema.org", "@type": "Organization", "mainEntityOfPage":{ "@type":"WebPage", "@id":"https://www.bitovi.com/academy/learn-canjs/connection.html", "description": "Connect the Todo model to the service layer (can-connect) " }, "url": "http://bitovi.com", "logo": "https://www.bitovi.com/hubfs/bitovi-logo-23-1.svg", "image": "https://www.bitovi.com/hubfs/bitovi-logo-x2.png", "name": "Bitovi Web App Consulting", "alternateName": "Bitovi", "naics": "541511", "description": "Bitovi is a UX, UI design and front-end JavaScript development consulting company", "address": { "@type": "PostalAddress", "streetAddress": "1134 Pine Tree Lane ", "addressLocality": "Libertyville", "addressRegion": "IL", "addressCountry": "United States", "postalCode": "60048" }, "areaServed": { "@type": "GeoCircle", "geoMidpoint": { "@type": "GeoCoordinates", "latitude": "41.8781", "longitude": "87.6298" }, "geoRadius": "5000 km" }, "telephone": "312-620-0386", "email": "contact@bitovi.com", "sameAs": [ "https://www.facebook.com/BitoviLLC/", "https://twitter.com/bitovi", "https://www.linkedin.com/company/bitovi" ] } ```