Interface Fields
- Interface fields define a common set of fields that multiple types can implement. This allows for polymorphic queries, where a single query can fetch fields that are in common with multiple types that implement the same interface.
- In GraphQL, interfaces are abstract types that define a set of fields. Interfaces are declared using the `interface` keyword followed by the interface name and the list of fields.
- Examples of Interface Fields in GraphQL are shown below:
interface Animal {
id: ID!
name: String!
}
type Cat implements Animal {
id: ID!
name: String!
breed: String!
}
type Dog implements Animal {
id: ID!
name: String!
color: String!
}
Explanation:
- In this example, we define an interface called `Animal` which has fields `id` and `name`.
- The two objects types `Dog` and `Cat`, both implement the `Animal` interface.
- Each type `Dog`and `Cat` include the fields required by the `Animal` interface (`id` and `name`) as well as additional fields that are specific to that object. For eg: `breed` for `Dog` and `color` for `Cat`.
Fields in GraphQL
Fields in GraphQL are the fundamental components that allow clients to specify the data they need from a server. They represent individual pieces of data that can be requested for an object. Understanding how fields work is essential for building efficient GraphQL queries and designing effective schemas.
In this article, We will learn about what are Fields, their different types with examples, and so on.
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