Creates a new item, or replaces an old item with a new item. If an item that has the
same primary key as the new item already exists in the specified table, the new item
completely replaces the existing item. You can perform a conditional put operation (add
a new item if one with the specified primary key doesn't exist), or replace an existing
item if it has certain attribute values. You can return the item's attribute values in
the same operation, using the ReturnValues parameter.
When you add an item, the primary key attributes are the only required attributes.
Attribute values cannot be null.
Empty String and Binary attribute values are allowed. Attribute values of type String
and Binary must have a length greater than zero if the attribute is used as a key
attribute for a table or index. Set type attributes cannot be empty.
Invalid Requests with empty values will be rejected with a
ValidationException exception.
To prevent a new item from replacing an existing item, use a conditional
expression that contains the attribute_not_exists function with the
name of the attribute being used as the partition key for the table. Since every
record must contain that attribute, the attribute_not_exists function
will only succeed if no matching item exists.
For more information about PutItem, see Working with
Items in the Amazon DynamoDB Developer Guide.
example
Use a bare-bones client and the command you need to make an API call.
Creates a new item, or replaces an old item with a new item. If an item that has the same primary key as the new item already exists in the specified table, the new item completely replaces the existing item. You can perform a conditional put operation (add a new item if one with the specified primary key doesn't exist), or replace an existing item if it has certain attribute values. You can return the item's attribute values in the same operation, using the
ReturnValuesparameter.When you add an item, the primary key attributes are the only required attributes. Attribute values cannot be null.
Empty String and Binary attribute values are allowed. Attribute values of type String and Binary must have a length greater than zero if the attribute is used as a key attribute for a table or index. Set type attributes cannot be empty.
Invalid Requests with empty values will be rejected with a
ValidationExceptionexception.To prevent a new item from replacing an existing item, use a conditional expression that contains the
attribute_not_existsfunction with the name of the attribute being used as the partition key for the table. Since every record must contain that attribute, theattribute_not_existsfunction will only succeed if no matching item exists.For more information about
PutItem, see Working with Items in the Amazon DynamoDB Developer Guide.Use a bare-bones client and the command you need to make an API call.
import { DynamoDBClient, PutItemCommand } from "@aws-sdk/client-dynamodb"; // ES Modules import // const { DynamoDBClient, PutItemCommand } = require("@aws-sdk/client-dynamodb"); // CommonJS import const client = new DynamoDBClient(config); const command = new PutItemCommand(input); const response = await client.send(command);PutItemCommandInput for command's
inputshape.PutItemCommandOutput for command's
responseshape.config for DynamoDBClient's
configshape.