To define schemas and resolvers with gqlgen in Go, you need to start by creating a GraphQL schema file and then generate the necessary Go code using gqlgen. Below is a simple example that demonstrates how to do this.
// schema.graphql
type Query {
hello: String!
}
// main.go
package main
import (
"github.com/graphql-go/graphql"
"github.com/graphql-go/handler"
"net/http"
)
func main() {
// Define the schema
helloField := graphql.Field{
Type: graphql.String,
Resolve: func(p graphql.ResolveParams) (interface{}, error) {
return "Hello, World!", nil
},
}
queryType := graphql.ObjectConfig{Name: "Query", Fields: graphql.Fields{"hello": &helloField}}
schema, _ := graphql.NewSchema(graphql.SchemaConfig{Query: graphql.NewObject(queryType)})
h := handler.New(&handler.Config{
Schema: &schema,
Pretty: true,
})
http.Handle("/graphql", h)
http.ListenAndServe(":8080", nil)
}
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