class Values 🔹

Language	Type name
.NET	Amazon.CDK.AWS.AppSync.Values
Java	software.amazon.awscdk.services.appsync.Values
Python	aws_cdk.aws_appsync.Values
TypeScript (source)	@aws-cdk/aws-appsync » Values

Factory class for attribute value assignments.

Example

const api = new appsync.GraphqlApi(this, 'Api', {
  name: 'demo',
  schema: appsync.Schema.fromAsset(path.join(__dirname, 'schema.graphql')),
  authorizationConfig: {
    defaultAuthorization: {
      authorizationType: appsync.AuthorizationType.IAM,
    },
  },
  xrayEnabled: true,
});

const demoTable = new dynamodb.Table(this, 'DemoTable', {
  partitionKey: {
    name: 'id',
    type: dynamodb.AttributeType.STRING,
  },
});

const demoDS = api.addDynamoDbDataSource('demoDataSource', demoTable);

// Resolver for the Query "getDemos" that scans the DynamoDb table and returns the entire list.
demoDS.createResolver({
  typeName: 'Query',
  fieldName: 'getDemos',
  requestMappingTemplate: appsync.MappingTemplate.dynamoDbScanTable(),
  responseMappingTemplate: appsync.MappingTemplate.dynamoDbResultList(),
});

// Resolver for the Mutation "addDemo" that puts the item into the DynamoDb table.
demoDS.createResolver({
  typeName: 'Mutation',
  fieldName: 'addDemo',
  requestMappingTemplate: appsync.MappingTemplate.dynamoDbPutItem(
    appsync.PrimaryKey.partition('id').auto(),
    appsync.Values.projecting('input'),
  ),
  responseMappingTemplate: appsync.MappingTemplate.dynamoDbResultItem(),
});

Initializer

new Values()

Methods

Name	Description
static attribute(attr)🔹	Allows assigning a value to the specified attribute.
static projecting(arg?)🔹	Treats the specified object as a map of assignments, where the property names represent attribute names.

---

static attribute(attr)🔹

public static attribute(attr: string): AttributeValuesStep

Parameters

• attr string

Returns

• AttributeValuesStep

Allows assigning a value to the specified attribute.

---

static projecting(arg?)🔹

public static projecting(arg?: string): AttributeValues

Parameters

• arg string

Returns

• AttributeValues

Treats the specified object as a map of assignments, where the property names represent attribute names.

It’s opinionated about how it represents some of the nested objects: e.g., it will use lists (“L”) rather than sets (“SS”, “NS”, “BS”). By default it projects the argument container ("$ctx.args").