AWSDynamoDBPutItemInput

Objective-C

@interface AWSDynamoDBPutItemInput

Swift

class AWSDynamoDBPutItemInput

Represents the input of a PutItem operation.

Required parameters: [TableName, Item]

  • A condition that must be satisfied in order for a conditional PutItem operation to succeed.

    An expression can contain any of the following:

    • Functions: attribute_exists | attribute_not_exists | attribute_type | contains | begins_with | size

      These function names are case-sensitive.

    • Comparison operators: = | <> | < | > | <= | >= | BETWEEN | IN

    • Logical operators: AND | OR | NOT

    For more information on condition expressions, see Condition Expressions in the Amazon DynamoDB Developer Guide.

    Declaration

    Objective-C

    @property (nonatomic, strong) NSString *_Nullable conditionExpression;

    Swift

    var conditionExpression: String? { get set }

  • This is a legacy parameter. Use ConditionExpression instead. For more information, see ConditionalOperator in the Amazon DynamoDB Developer Guide.

    Declaration

    Objective-C

    @property (nonatomic) AWSDynamoDBConditionalOperator conditionalOperator;

    Swift

    var conditionalOperator: AWSDynamoDBConditionalOperator { get set }

  • This is a legacy parameter. Use ConditionExpression instead. For more information, see Expected in the Amazon DynamoDB Developer Guide.

    Declaration

    Objective-C

    @property (nonatomic, strong) NSDictionary<NSString *, AWSDynamoDBExpectedAttributeValue *> *_Nullable expected;

    Swift

    var expected: [String : AWSDynamoDBExpectedAttributeValue]? { get set }

  • One or more substitution tokens for attribute names in an expression. The following are some use cases for using ExpressionAttributeNames:

    • To access an attribute whose name conflicts with a DynamoDB reserved word.

    • To create a placeholder for repeating occurrences of an attribute name in an expression.

    • To prevent special characters in an attribute name from being misinterpreted in an expression.

    Use the # character in an expression to dereference an attribute name. For example, consider the following attribute name:

    • Percentile

    The name of this attribute conflicts with a reserved word, so it cannot be used directly in an expression. (For the complete list of reserved words, see Reserved Words in the Amazon DynamoDB Developer Guide). To work around this, you could specify the following for ExpressionAttributeNames:

    • {"#P":"Percentile"}

    You could then use this substitution in an expression, as in this example:

    • #P = :val

    Tokens that begin with the : character are expression attribute values, which are placeholders for the actual value at runtime.

    For more information on expression attribute names, see Specifying Item Attributes in the Amazon DynamoDB Developer Guide.

    Declaration

    Objective-C

    @property (nonatomic, strong) NSDictionary<NSString *, NSString *> *_Nullable expressionAttributeNames;

    Swift

    var expressionAttributeNames: [String : String]? { get set }

  • One or more values that can be substituted in an expression.

    Use the : (colon) character in an expression to dereference an attribute value. For example, suppose that you wanted to check whether the value of the ProductStatus attribute was one of the following:

    Available | Backordered | Discontinued

    You would first need to specify ExpressionAttributeValues as follows:

    { ":avail":{"S":"Available"}, ":back":{"S":"Backordered"}, ":disc":{"S":"Discontinued"} }

    You could then use these values in an expression, such as this:

    ProductStatus IN (:avail, :back, :disc)

    For more information on expression attribute values, see Condition Expressions in the Amazon DynamoDB Developer Guide.

    Declaration

    Objective-C

    @property (nonatomic, strong) NSDictionary<NSString *, AWSDynamoDBAttributeValue *> *_Nullable expressionAttributeValues;

    Swift

    var expressionAttributeValues: [String : AWSDynamoDBAttributeValue]? { get set }

  • A map of attribute name/value pairs, one for each attribute. Only the primary key attributes are required; you can optionally provide other attribute name-value pairs for the item.

    You must provide all of the attributes for the primary key. For example, with a simple primary key, you only need to provide a value for the partition key. For a composite primary key, you must provide both values for both the partition key and the sort key.

    If you specify any attributes that are part of an index key, then the data types for those attributes must match those of the schema in the table’s attribute definition.

    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.

    For more information about primary keys, see Primary Key in the Amazon DynamoDB Developer Guide.

    Each element in the Item map is an AttributeValue object.

    Declaration

    Objective-C

    @property (nonatomic, strong) NSDictionary<NSString *, AWSDynamoDBAttributeValue *> *_Nullable item;

    Swift

    var item: [String : AWSDynamoDBAttributeValue]? { get set }

  • Determines the level of detail about either provisioned or on-demand throughput consumption that is returned in the response:

    • INDEXES - The response includes the aggregate ConsumedCapacity for the operation, together with ConsumedCapacity for each table and secondary index that was accessed.

      Note that some operations, such as GetItem and BatchGetItem, do not access any indexes at all. In these cases, specifying INDEXES will only return ConsumedCapacity information for table(s).

    • TOTAL - The response includes only the aggregate ConsumedCapacity for the operation.

    • NONE - No ConsumedCapacity details are included in the response.

    Declaration

    Objective-C

    @property (nonatomic) AWSDynamoDBReturnConsumedCapacity returnConsumedCapacity;

    Swift

    var returnConsumedCapacity: AWSDynamoDBReturnConsumedCapacity { get set }

  • Determines whether item collection metrics are returned. If set to SIZE, the response includes statistics about item collections, if any, that were modified during the operation are returned in the response. If set to NONE (the default), no statistics are returned.

    Declaration

    Objective-C

    @property (nonatomic) AWSDynamoDBReturnItemCollectionMetrics returnItemCollectionMetrics;

    Swift

    var returnItemCollectionMetrics: AWSDynamoDBReturnItemCollectionMetrics { get set }

  • Use ReturnValues if you want to get the item attributes as they appeared before they were updated with the PutItem request. For PutItem, the valid values are:

    • NONE - If ReturnValues is not specified, or if its value is NONE, then nothing is returned. (This setting is the default for ReturnValues.)

    • ALL_OLD - If PutItem overwrote an attribute name-value pair, then the content of the old item is returned.

    The values returned are strongly consistent.

    There is no additional cost associated with requesting a return value aside from the small network and processing overhead of receiving a larger response. No read capacity units are consumed.

    The ReturnValues parameter is used by several DynamoDB operations; however, PutItem does not recognize any values other than NONE or ALL_OLD.

    Declaration

    Objective-C

    @property (nonatomic) AWSDynamoDBReturnValue returnValues;

    Swift

    var returnValues: AWSDynamoDBReturnValue { get set }

  • An optional parameter that returns the item attributes for a PutItem operation that failed a condition check.

    There is no additional cost associated with requesting a return value aside from the small network and processing overhead of receiving a larger response. No read capacity units are consumed.

    Declaration

    Objective-C

    @property (nonatomic) AWSDynamoDBReturnValuesOnConditionCheckFailure returnValuesOnConditionCheckFailure;

    Swift

    var returnValuesOnConditionCheckFailure: AWSDynamoDBReturnValuesOnConditionCheckFailure { get set }

  • The name of the table to contain the item. You can also provide the Amazon Resource Name (ARN) of the table in this parameter.

    Declaration

    Objective-C

    @property (nonatomic, strong) NSString *_Nullable tableName;

    Swift

    var tableName: String? { get set }