What is GraphQL enum?

What is GraphQL enum?

In GraphQL, an enum is a type that represents one of a predefined set of possible values.

It is similar to an enum in other programming languages, and is used to define a list of possible values that a field or argument can take. Enums are often used to represent a set of predefined options, such as a list of possible colors or a list of possible states.

Yes, you can use enums in GraphQL. To define an enum in a GraphQL schema, you use the enum keyword followed by the name of the enum and a list of possible values.

Here is an example of how to define an enum in GraphQL:

enum Color {
  RED
  GREEN
  BLUE
}

This example defines an enum called Color with three possible values: RED, GREEN, and BLUE.

Once an enum has been defined, you can use it to specify the type of a field or argument in your schema. For example, you could use the Color enum from the previous example to define a field that represents the color of a product:

type Product {
  name: String
  color: Color
}

In this example, the color field is of type Color, which means that it can only take values that are defined in the Color enum (i.e. RED, GREEN, or BLUE).

Conclusion

Enums are a useful way to define a predefined set of possible values in a GraphQL schema. They can help you enforce consistency and reduce the number of possible values that a field or argument can take.