graphql-relational-schema-transformer

import { AmplifyGraphqlApi, AmplifyGraphqlDefinition } from '@aws-amplify/graphql-api-construct'; import { App, Stack } from 'aws-cdk-lib'; import { CfnParameter } from 'aws-cdk-lib'; const app = new App(); const stack = new Stack(app, 'MyAmplifyRelationalApiStack'); // Define your database connection details using CDK parameters or environment variables. // In a real application, retrieve these securely (e.g., from AWS Secrets Manager). const dbHost = new CfnParameter(stack, 'DbHost', { type: 'String', description: 'Database Hostname' }).valueAsString; const dbName = new CfnParameter(stack, 'DbName', { type: 'String', description: 'Database Name' }).valueAsString; const dbUser = new CfnParameter(stack, 'DbUser', { type: 'String', description: 'Database User' }).valueAsString; const dbPassword = new CfnParameter(stack, 'DbPassword', { type: 'String', description: 'Database Password', noEcho: true }).valueAsString; // A simplified GraphQL schema for a relational model. // In a typical Amplify CLI workflow, this would be in `amplify/backend/api/<api-name>/schema.sql.graphql` const relationalSchema = ` type Post @model @hasMany(references: "Author") { id: ID! title: String! content: String authorId: ID author: Author @belongsTo(references: "Post") } type Author @model { id: ID! name: String! email: String! posts: [Post] } # Example of how to connect to an existing database table (e.g., in schema.sql.graphql) # Note: The actual connection parameters are provided at deployment time, # not directly in the GraphQL schema directives for relational sources. `; new AmplifyGraphqlApi(stack, 'MyRelationalApi', { apiName: 'myRelationalApi', definition: AmplifyGraphqlDefinition.fromString(relationalSchema, { // These are example settings; actual implementation varies by database and security setup. // The transformer would infer schema from the live database during 'amplify push' // or when using `amplify import api` via Amplify CLI. // For CDK, you might define the RDS data source and connect it. // This part is highly dependent on how your RDS instance is managed and exposed. database: { engine: 'MYSQL', vpcConfig: { vpcId: 'vpc-xxxxxxxxxxxxx', // Replace with your VPC ID securityGroupIds: ['sg-xxxxxxxxxxxxx'], // Replace with your Security Group ID subnetIds: ['subnet-xxxxxxxxxxxxx', 'subnet-yyyyyyyyyyyyy'], // Replace with your Subnet IDs }, clusterIdentifier: 'my-rds-cluster', secretArn: 'arn:aws:secretsmanager:REGION:ACCOUNT:secret:rds-credentials-xxxxxx' // Example } }) }); app.synth();