simple_example.go

func init() {
    mutationConfig.AddFieldConfig("sentimentAnalysis", &graphql.Field{
        Type: graphql.NewObject(graphql.ObjectConfig{
            Name:        "SentimentAnalysisResult",
            Description: "Sentiment Analysis Response",
            Fields: graphql.Fields{
                "score": &graphql.Field{
                    Type: graphql.Int,
                },
            },
        }),
        Args: graphql.FieldConfigArgument{
            "text": &graphql.ArgumentConfig{
                Type: &graphql.NonNull{
                    OfType: graphql.String,
                },
            },
            "lang": &graphql.ArgumentConfig{
                Type: graphql.String,
            },
        },
        Resolve: wrapIsAuth(wrapGraphQL(func(ctx context.Context, input struct {
            Text string
            Lang *string
        }, _ []*ValidationError) (interface{}, error) {
            logger := service.LoggerFromContext(ctx)
            analyizer := service.GetSentimentAnalysis(ctx)

            logger.Info("Calling SentimentAnalysis")

            //  https://godoc.org/github.com/cdipaolo/sentiment#Models.SentimentAnalysis
            result := analyizer.SentimentAnalysis(input.Text, input.Lang)

            return &result, nil
        })),
    })
}