request-mapping-template.vtl

{
    "version" : "2017-02-28",
    "operation" : "Query",
    "query" : {
        "expression": "#typeName = :typeName",
        "expressionNames": {
        	"#typeName": "typeName"
        },
        "expressionValues" : {
            ":typeName" : $util.dynamodb.toDynamoDBJson("REVIEW")
        }
    },
    "filter": {
    	"expression": "#location = :location",
        "expressionNames": {
      		"#location": "locationId"
        },
        "expressionValues": {
        	":location": $util.dynamodb.toDynamoDBJson($context.source.id)
		}
    },
    "limit": $util.defaultIfNull(${ctx.args.limit}, 20),
    "nextToken": $util.toJson($util.defaultIfNullOrBlank($ctx.args.nextToken, null))
}