BaseResolverProps Struct
Basic properties for an AppSync resolver.
Example
ts
// Create username and password secret for DB Cluster
const secret = new rds.DatabaseSecret(this, 'AuroraSecret', {
username: 'clusteradmin',
});
// The VPC to place the cluster in
const vpc = new ec2.Vpc(this, 'AuroraVpc');
// Create the serverless cluster, provide all values needed to customise the database.
const cluster = new rds.ServerlessCluster(this, 'AuroraCluster', {
engine: rds.DatabaseClusterEngine.AURORA_MYSQL,
vpc,
credentials: { username: 'clusteradmin' },
clusterIdentifier: 'db-endpoint-test',
defaultDatabaseName: 'demos',
});
// Build a data source for AppSync to access the database.
declare const api: appsync.GraphqlApi;
const rdsDS = api.addRdsDataSource('rds', cluster, secret, 'demos');
// Set up a resolver for an RDS query.
rdsDS.createResolver('QueryGetDemosRdsResolver', {
typeName: 'Query',
fieldName: 'getDemosRds',
requestMappingTemplate: appsync.MappingTemplate.fromString(`
{
"version": "2018-05-29",
"statements": [
"SELECT * FROM demos"
]
}
`),
responseMappingTemplate: appsync.MappingTemplate.fromString(`
$utils.toJson($utils.rds.toJsonObject($ctx.result)[0])
`),
});
// Set up a resolver for an RDS mutation.
rdsDS.createResolver('MutationAddDemoRdsResolver', {
typeName: 'Mutation',
fieldName: 'addDemoRds',
requestMappingTemplate: appsync.MappingTemplate.fromString(`
{
"version": "2018-05-29",
"statements": [
"INSERT INTO demos VALUES (:id, :version)",
"SELECT * WHERE id = :id"
],
"variableMap": {
":id": $util.toJson($util.autoId()),
":version": $util.toJson($ctx.args.version)
}
}
`),
responseMappingTemplate: appsync.MappingTemplate.fromString(`
$utils.toJson($utils.rds.toJsonObject($ctx.result)[1][0])
`),
});
Properties
cachingConfigCachingConfigcaching_configCachingConfigcachingConfigCachingConfigCachingConfigCachingConfigCachingConfigCachingConfig= No caching configuration#The caching configuration for this resolver.
name of the GraphQL field in the given type this resolver is attached to.
maxBatchSizenumbermax_batch_sizeint | floatmaxBatchSizeNumberMaxBatchSizedoubleMaxBatchSize*float64= No max batch size#The maximum number of elements per batch, when using batch invoke.
metricsConfigResolverMetricsConfigmetrics_configResolverMetricsConfigmetricsConfigResolverMetricsConfigMetricsConfigResolverMetricsConfigMetricsConfigResolverMetricsConfig= no metrics configuration#Whether to enable enhanced metrics Value will be ignored, if `enhancedMetricsConfig.resolverLevelMetricsBehavior` on AppSync GraphqlApi construct is set to `FULL_REQUEST_RESOLVER_METRICS`.
pipelineConfigIFunctionConfigurationRef[]pipeline_configtyping.List[IFunctionConfigurationRef]pipelineConfigList<IFunctionConfigurationRef>PipelineConfigIFunctionConfigurationRef[]PipelineConfig*[]IFunctionConfigurationRef= no pipeline resolver configurati…#configuration of the pipeline resolver.
default
Default: no pipeline resolver configuration An empty array | undefined sets resolver to be of kind, unit
requestMappingTemplateMappingTemplaterequest_mapping_templateMappingTemplaterequestMappingTemplateMappingTemplateRequestMappingTemplateMappingTemplateRequestMappingTemplateMappingTemplate= No mapping template#The request mapping template for this resolver.
responseMappingTemplateMappingTemplateresponse_mapping_templateMappingTemplateresponseMappingTemplateMappingTemplateResponseMappingTemplateMappingTemplateResponseMappingTemplateMappingTemplate= No mapping template#The response mapping template for this resolver.
runtimeFunctionRuntimeruntimeFunctionRuntimeruntimeFunctionRuntimeRuntimeFunctionRuntimeRuntimeFunctionRuntime= no function runtime, VTL mapping…#The functions runtime.
default
Default: no function runtime, VTL mapping templates used
name of the GraphQL type this resolver is attached to.