Cannot work Nearby as concurrently using graphql-go

[vishnutm]

@tidwall
Currently, try to perform Nearby function in driver detail in a concurrent manner. I currently use the graphql-go method to fetch the APIs.

current Nearby function

My go-routine method (Resolve function)

`func GetNearbyUser() *graphql.Field {
return &graphql.Field{
Type: graphql.NewList(types.NearbyType),
Args: graphql.FieldConfigArgument{

		"latitude": &graphql.ArgumentConfig{
			Type: graphql.NewNonNull(graphql.Float),
		},

		"longitude": &graphql.ArgumentConfig{
			Type: graphql.NewNonNull(graphql.Float),
		},

		"collection": &graphql.ArgumentConfig{
			Type: graphql.NewNonNull(graphql.String),
		},

		"radius": &graphql.ArgumentConfig{
			Type:         graphql.Float,
			DefaultValue: 2000.00,
		},
	},

	Resolve: func(params graphql.ResolveParams) (interface{}, error) {

		ch := make(chan []types.NearbyLocation)

		go func() {
			var Lat = params.Args["latitude"].(float64)
			var Long = params.Args["longitude"].(float64)
			var radius = params.Args["radius"].(float64)
			var collection = params.Args["collection"].(string)
			response, _ := tile38.Nearby(collection, Lat, Long, radius)
			ch <- response
		}()

		return func() interface{} {

			return <-ch
		}, nil

	},
}

}`

Error Result

query : query {nearbyUser(collection:"driver",latitude:8.55652,longitude:76.872894,radius:2000){latitude,longitude,id}}

[tidwall]

The error you are getting does not appear to be related to Tile38 and I'm unfamiliar with graphql.

But at first glance, you appear to be running into some type of Go syntax error.

Perhaps your Resolve function should be something like:

Resolve: func(params graphql.ResolveParams) (interface{}, error) {
	return func() (interface{}, error) {
		var Lat = params.Args["latitude"].(float64)
		var Long = params.Args["longitude"].(float64)
		var radius = params.Args["radius"].(float64)
		var collection = params.Args["collection"].(string)
		resp, err := tile38.Nearby(collection, Lat, Long, radius)
		return resp, err
	}, nil
}

You may want to ask this question on a graphql-go forum.

[vishnutm]

@tidwall, Thank you for your valuable suggestion