When the installation completes, restart Terminal and type npm -v and press Enter. pkg file, and you should see the following:Ĭlick Continue and follow the steps. At the time of writing, the current LTS version is 14.15.1 LTS. #DSYNC SWIFT INSTALL#To install both Node.js and npm navigate to the node.js website and click the download link labeled LTS. If it’s installed, you should see the version number printed in the Terminal window. If you’re unsure if you have npm installed, open Terminal and type npm -v, then press Enter. In this project, you’ll be using npm to install the Amplify CLI. Node Package Manager (npm) is a package manager and CLI (command line interface) for managing Node.js packages. If that’s the case, you can skip to the relevant section. You may already have some (or all) of these installed. You’re going to start by installing the project dependencies. After some configuration, you’ll only talk your back end in a type-safe way. Your app will communicate with AppSync via GraphQL behind the scenes however, you’ll be using the AppSync iOS framework to abstract away a lot of this complexity. It acts as a bridge between GraphQL and other AWS services such as data storage, caching and real-time updates.ĪppSync provides a dashboard for your project where you can view and query your data, as well as add custom functionality through custom functions. GraphQL with AWS AppSyncĪWS AppSync does all the heavy lifting of your back-end web service. Adding and removing fields in this way would require changes to the API when using REST, whereas here, you can just change the query inside the app, without having to modify the server at all. You send this query to the server and the server responds with a data structure that matches your query. This GraphQL query only accesses the data required by specifying the fields it cares about. This is how you would fetch the data for that screen, using a GraphQL query: Assume you have a screen in your app that lists all to dos, but only requires the name and completed fields. The server defines this type so that you can fetch it. The best way to see how GraphQL operates is with an example.Ībove is an example of a GraphQL schema describing the Todo type, the basic to do structure you’ll use when building RazeList. With this approach, clients only access the data they need and minimize the amount of data sent over the network. Most APIs these days would be considered RESTful however, the REST standard is loosely interpreted so you’ll likely have a different experience across multiple REST APIs.Ĭontrary to REST, GraphQL only exposes a single endpoint which you interact with via queries. REST APIs work by exposing multiple endpoints for applications, each one designed for a specific data type. If you’ve worked with server-side APIs before, you’re likely already familiar with REST. GraphQL was developed by Facebook in 2012 it’s a query language and server-side runtime for executing queries designed to work with server-side APIs. About GraphQL and AppSyncīefore writing any code, you’ll first need to learn what GraphQL is and how it works with AppSync. You’re going to change that, but there are a few prerequisites you need to take care of first. Right now, the project is nothing more than a greeting. It’s your one source of truth for all of your to dos, and more importantly, all of your “dones”! When you’re finished with this tutorial, you’ll always know where you are with your tasks, no matter which device you’re using. RazeList helps your to dos stay in sync across all your iOS devices. Open RazeList.xcodeproj inside the starter folder. The app will work both with and without an internet connection as well! Getting Startedĭownload the project materials using the Download Materials button at the top or bottom of this tutorial. The app will allow you to create, delete and complete to dos while keeping your app’s data synchronized with the AppSync cloud service. You’ll learn all this by implementing a to do list app with SwiftUI. Save your application’s data to AWS AppSync.Implement models using GraphQL and generate local files with Amplify.Install AWS Amplify and its dependencies.In this tutorial, you’ll use Amazon’s BaaS offering called AppSync along with the Amplify framework to add a back end component to your iOS app. Once configured, these BaaS services function the same way any other API would with little to no upfront back end knowledge required. BaaS tools offer integration with cloud storage services via the use of simple APIs. You may have heard the acronym BaaS (Back end as a service) before. Targeted push notifications? Back end… you get the idea. Want to sync data across devices? Guess what, you’ll need a back end. Need user accounts? You’ll need a back end for that. Most apps nowadays require a back end to work.
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