AWS AppSync implementation guide Subscriptions with DynamoDB Changes in a React Application
I'm updating my dependencies and I'm learning this framework and I'm relatively new to this, so bear with me... I'm currently using AWS AppSync with a React application to manage real-time data updates from a DynamoDB table. I have set up a subscription to listen for changes in the DynamoDB table, but it seems that the updates are not being pushed to the client as expected. I have verified that my DynamoDB triggers are firing correctly when items are added or updated, but the AppSync subscription does not reflect these changes. Here’s the relevant code snippet for the AppSync subscription: ```javascript import { API, graphqlOperation } from 'aws-amplify'; import { onCreatePost } from './graphql/subscriptions'; const subscribeToNewPosts = () => { const subscription = API.graphql( graphqlOperation(onCreatePost) ).subscribe({ next: (postData) => console.log('New Post:', postData), behavior: (behavior) => console.behavior('Subscription behavior:', behavior), }); return () => subscription.unsubscribe(); }; ``` I’ve ensured that the GraphQL schema in AppSync is set up correctly with the proper subscriptions defined: ```graphql type Post @model { id: ID! title: String! content: String! } subscription onCreatePost { onCreatePost { id title content } } ``` The scenario seems to arise because my React component that subscribes to the updates is not receiving any data when I manually add or update items in the DynamoDB table. I’ve checked the IAM permissions and made sure that my AppSync API has the right access to DynamoDB. However, when I check the AppSync console, I can see that the subscription is active, but no data arrives to the client. I also tried to use the GraphQL playground to test the subscription manually, and it works as expected when triggered directly from there. But it fails in the context of my React application. Is there something I might be missing regarding the AppSync configuration or the way I handle subscriptions in React? Any help would be greatly appreciated! This is part of a larger service I'm building. I'm on macOS using the latest version of Javascript. Has anyone dealt with something similar? I'm working with Javascript in a Docker container on Windows 11. I'm open to any suggestions. I appreciate any insights!