Question 1

How to set up Hasura with a PostgreSQL database?

Accepted Answer

Hasura provides quickstart guides in its documentation for V2 or V3. Typically, you deploy it via Docker or cloud services, connect to your PostgreSQL instance, and it auto-generates the GraphQL API based on your schema. Check the docs for detailed steps on permissions and real-time setup.

Question 2

Can Hasura handle real-time data updates for a live dashboard?

Accepted Answer

Yes, Hasura supports GraphQL subscriptions out of the box, allowing live queries for real-time data. This is ideal for dashboards, chat apps, or any feature needing instant updates without polling.

Question 3

Hasura vs Prisma: which is better for GraphQL APIs?

Accepted Answer

Hasura auto-generates a full GraphQL API from databases with built-in real-time and security, while Prisma is an ORM for database access that requires you to build the API layer. Choose Hasura for rapid, production-ready APIs, and Prisma for more control over custom resolvers and business logic.

Question 4

How to add custom business logic in Hasura without writing backend code?

Accepted Answer

You can extend Hasura using webhooks for database events or the Connector SDKs for TypeScript, Python, or Go. This allows integrating serverless functions or microservices to handle complex logic beyond basic CRUD operations.

Question 5

Does Hasura support NoSQL databases like MongoDB?

Accepted Answer

Yes, Hasura V3 supports MongoDB along with other databases like PostgreSQL and ClickHouse. It uses data connectors to integrate these sources, enabling a unified GraphQL API across different database types.

Question 6

What are the limitations of using Hasura for large-scale applications?

Accepted Answer

Hasura's auto-generated API can become complex with highly normalized schemas, and performance might depend on database optimizations. For very high traffic, you may need to fine-tune subscriptions and caching, as it adds an abstraction layer.

Question 7

How to secure Hasura APIs with role-based access control?

Accepted Answer

Hasura includes a built-in permission system where you define roles and rules for tables or columns. You can set row-level security and integrate with authentication providers like Auth0 or custom JWT tokens for secure data access.

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