Type: AWS::AppSync::Resolver
Properties:
  ApiId: !GetAtt AppSyncAPI.ApiId
  DataSourceName: !GetAtt AppSyncDynamoDBMaterialSource.Name
  TypeName: "Query"
  FieldName: "listUserMaterials"
  RequestMappingTemplate: |
    #set( $ListRequest = {
      "version": "2018-05-29",
      "operation": "Query",
      "query": {
        "expression": "#owner = :owner",
        "expressionNames": {
          "#owner": "owner"
        },
        "expressionValues": {
          ":owner": { "S": $util.defaultIfNull($ctx.args.owner, $ctx.identity.sub) }
        }
      }
    } )
    #if( $context.args.limit )
      #set( $ListRequest.limit = $context.args.limit )
    #end
    #if( $context.args.nextToken )
      #set( $ListRequest.nextToken = $context.args.nextToken )
    #end
    #if( $context.args.filter )
      #set( $ListRequest.filter = $util.parseJson("$util.transform.toDynamoDBFilterExpression($ctx.args.filter)") )
    #end
    $util.toJson($ListRequest)
  ResponseMappingTemplate: |
    #if( $ctx.error )
      $util.error($ctx.error.message, $ctx.error.type)
    #else
      $util.toJson($ctx.result)
    #end