class Aws::DynamoDB::Types::ConditionCheck

@see docs.aws.amazon.com/goto/WebAPI/dynamodb-2012-08-10/ConditionCheck AWS API Documentation
@return [String]
and ALL_OLD.
‘ReturnValuesOnConditionCheckFailure`, the valid values are: NONE
if the `ConditionCheck` condition fails. For
Use `ReturnValuesOnConditionCheckFailure` to get the item attributes
@!attribute [rw] return_values_on_condition_check_failure
@return [Hash<String,Types::AttributeValue>]
One or more values that can be substituted in an expression.
@!attribute [rw] expression_attribute_values
@return [Hash<String,String>]
expression.
One or more substitution tokens for attribute names in an
@!attribute [rw] expression_attribute_names
@return [String]
to succeed.
A condition that must be satisfied in order for a conditional update
@!attribute [rw] condition_expression
@return [String]
Name of the table for the check item request.
@!attribute [rw] table_name
@return [Hash<String,Types::AttributeValue>]
an attribute name and a value for that attribute.
The primary key of the item to be checked. Each element consists of
@!attribute [rw] key
}
return_values_on_condition_check_failure: “ALL_OLD”, # accepts ALL_OLD, NONE
},
“ExpressionAttributeValueVariable” => “value”, # value <Hash,Array,String,Numeric,Boolean,IO,Set,nil>
expression_attribute_values: {
},
“ExpressionAttributeNameVariable” => “AttributeName”,
expression_attribute_names: {
condition_expression: “ConditionExpression”, # required
table_name: “TableName”, # required
},
“AttributeName” => “value”, # value <Hash,Array,String,Numeric,Boolean,IO,Set,nil>
key: { # required
{
data as a hash:
@note When making an API call, you may pass ConditionCheck
check the condition of specific attributes of the item..
Represents a request to perform a check that an item exists or to