added viewer field to auth example

README.md

@@ -209,9 +209,9 @@ import (
 viewerField := &gateway.QueryField{
 	Name: "viewer",
 	Type: ast.NamedType("User", &ast.Position{}),
-	Resolver: func(ctx context.Context, args ast.ArgumentList, variables map[string]interface{}) (string, error) {
+	Resolver: func(ctx context.Context, args variables map[string]interface{}) (string, error) {
 		// for now just return the value in context
-		return context.value("user-id").(string), nil
+		return ctx.Value("user-id").(string), nil
 	},
 }
 

examples/auth/README.md

@@ -19,8 +19,8 @@ The general flow goes something like:
 
 - The other services [uses the header value](https://github.com/nautilus/gateway/blob/master/examples/auth/todo.go#L89) to perform whatever user-specific logic is
   required.
-  
-- The current user can query for their User record with the [viewer gateway field]() (coming soon)
+
+- The current user can query for their User record with the [viewer gateway field](https://github.com/nautilus/gateway/blob/master/examples/auth/gateway.go#L50-L58) (coming soon)
 
 Keep in mind that this demo should not be taken as an example of a secure
 authorization system. Its purpose is just to illustrate how one can pass

examples/auth/gateway.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/nautilus/gateway"
 	"github.com/nautilus/graphql"
+	"github.com/vektah/gqlparser/ast"
 )
 
 // the first thing we need to define is a middleware for our handler
@@ -44,6 +45,17 @@ var forwardUserID = gateway.RequestMiddleware(func(r *http.Request) error {
 	return nil
 })
 
+// we can also define a field at the root of the API in order to resolve fields
+// for the current user
+var viewerField = &gateway.QueryField{
+	Name: "viewer",
+	Type: ast.NamedType("User", &ast.Position{}),
+	Resolver: func(ctx context.Context, args map[string]interface{}) (string, error) {
+		// for now just return the value in context
+		return ctx.Value("user-id").(string), nil
+	},
+}
+
 func main() {
 	// introspect the apis
 	schemas, err := graphql.IntrospectRemoteSchemas(
@@ -55,7 +67,7 @@ func main() {
 	}
 
 	// create the gateway instance
-	gw, err := gateway.New(schemas, gateway.WithMiddlewares(forwardUserID))
+	gw, err := gateway.New(schemas, gateway.WithMiddlewares(forwardUserID), gateway.WithQueryFields(viewerField))
 	if err != nil {
 		panic(err)
 	}