jacoz/gqlgen-oneof-directive

Package

This package allows you to define a constraint to your graphql input.

Requirements

• go >= 1.18
• 99designs/gqlgen >= 0.17

Setup

1. Add this library to your go project with:

go get -u github.com/jacoz/gqlgen-oneof-directive
go mod tidy

2. Add to your schema.graphqls file the directive and then use it like the example below:

directive @oneOf on INPUT_OBJECT

# ...

input PaymentRequestInput @oneOf {
    card: CardPaymentRequestInput
    sepa: SepaPaymentRequestInput
    invoice: InvoicePaymentRequestInput
}

3. Regenerate the graphql schema with the command

go run github.com/99designs/gqlgen generate

4. Load the directive into your graphql server configuration:

c := generated.Config{}
c.Directives.OneOf = oneof.Directive