PostGraphile

Step 1: Connect PostGraphile to the existing database.

Step 2: Define a GraphQL schema that matches the REST API's functionality.

Step 3: Implement any custom resolvers required for complex data transformations.

Step 4: Deploy the GraphQL API and migrate clients to use it.

Step 1: Connect PostGraphile to the database.

Step 2: Use GraphiQL to explore the generated GraphQL schema.

Step 3: Write GraphQL queries to retrieve the desired data.

Step 4: Customize the schema to add any necessary computed columns or relationships.

Step 1: Set up PostgreSQL LISTEN/NOTIFY triggers for relevant database tables.

Step 2: Enable GraphQL subscriptions in PostGraphile.

Step 3: Subscribe to data changes in the client application.

Step 4: Handle incoming updates and refresh the UI.

Step 1: Connect PostGraphile to the legacy database.

Step 2: Explore the generated schema and identify any areas that require customization.

Step 3: Use Graphile Build plugins to rename types, add computed columns, and handle relationships.

Step 4: Deploy the GraphQL API and document its usage.

Step 1: Connect PostGraphile to the database.

Step 2: Define a GraphQL schema that matches the mobile app's data requirements.

Step 3: Implement authentication and authorization to secure the API.

Step 4: Optimize queries for mobile devices by using connection filtering and pagination.