What are GraphQL interfaces and how do they work?

What are GraphQL interfaces and how do they work?

GraphQL interfaces allow you to define a set of fields that multiple types can implement. They enable polymorphism in your schema.

Can you give me an example of how to define an interface in GraphQL?

Sure! You can define an interface like this:

interface Character {
  id: ID!
  name: String!
}

Then, types like Hero and Villain can implement this interface.

How do I query data using an interface?

You can query an interface by specifying the fields defined in it. For example:

query {
  characters {
    id
    name
  }
}

This will return data for all characters that implement the Character interface.

What are the benefits of using interfaces in GraphQL?

Interfaces promote code reusability and help maintain a clean schema by allowing different types to share common fields.