feat(appsync): mapping template for lambda proxy

Adds default payload argument for `lambdaRequest` static methods' payload argument in MappingTemplate
aws · Feb 18, 2020 · f865d5e · f865d5e
2 parents c505348 + 0526935
commit f865d5e
Showing 1 changed file with 5 additions and 3 deletions.
diff --git a/packages/@aws-cdk/aws-appsync/lib/graphqlapi.ts b/packages/@aws-cdk/aws-appsync/lib/graphqlapi.ts
@@ -312,7 +312,7 @@ export abstract class BaseDataSource extends Construct implements IGrantable {
      */
     public readonly name: string;
     /**
-     * the underlying CFNN data source resource
+     * the underlying CFN data source resource
      */
     public readonly ds: CfnDataSource;
 
@@ -868,9 +868,11 @@ export abstract class MappingTemplate {
 
     /**
      * Mapping template to invoke a Lambda function
-     * @param payload the VTL template snippet of the payload to send to the lambda
+     *
+     * @param payload the VTL template snippet of the payload to send to the lambda.
+     * If no payload is provided all available context fields are sent to the Lambda function
      */
-    public static lambdaRequest(payload: string): MappingTemplate {
+    public static lambdaRequest(payload: string = '$util.toJson($ctx)'): MappingTemplate {
         return this.fromString(`{"version": "2017-02-28", "operation": "Invoke", "payload": ${payload}}`);
     }