You are viewing documentation for version 2 of the AWS SDK for Ruby. Version 3 documentation can be found here.
Class: Aws::DynamoDB::Types::ConditionCheck
- Inherits:
-
Struct
- Object
- Struct
- Aws::DynamoDB::Types::ConditionCheck
- Defined in:
- (unknown)
Overview
When passing ConditionCheck as input to an Aws::Client method, you can use a vanilla Hash:
{
key: { # required
"AttributeName" => "value", # value <Hash,Array,String,Numeric,Boolean,IO,Set,nil>
},
table_name: "TableName", # required
condition_expression: "ConditionExpression", # required
expression_attribute_names: {
"ExpressionAttributeNameVariable" => "AttributeName",
},
expression_attribute_values: {
"ExpressionAttributeValueVariable" => "value", # value <Hash,Array,String,Numeric,Boolean,IO,Set,nil>
},
return_values_on_condition_check_failure: "ALL_OLD", # accepts ALL_OLD, NONE
}
Represents a request to perform a check that an item exists or to check the condition of specific attributes of the item.
Returned by:
Instance Attribute Summary collapse
-
#condition_expression ⇒ String
A condition that must be satisfied in order for a conditional update to succeed.
-
#expression_attribute_names ⇒ Hash<String,String>
One or more substitution tokens for attribute names in an expression.
-
#expression_attribute_values ⇒ Hash<String,Types::AttributeValue>
One or more values that can be substituted in an expression.
-
#key ⇒ Hash<String,Types::AttributeValue>
The primary key of the item to be checked.
-
#return_values_on_condition_check_failure ⇒ String
Use
ReturnValuesOnConditionCheckFailure
to get the item attributes if theConditionCheck
condition fails. -
#table_name ⇒ String
Name of the table for the check item request.
Instance Attribute Details
#condition_expression ⇒ String
A condition that must be satisfied in order for a conditional update to succeed.
#expression_attribute_names ⇒ Hash<String,String>
One or more substitution tokens for attribute names in an expression.
#expression_attribute_values ⇒ Hash<String,Types::AttributeValue>
One or more values that can be substituted in an expression.
#key ⇒ Hash<String,Types::AttributeValue>
The primary key of the item to be checked. Each element consists of an attribute name and a value for that attribute.
#return_values_on_condition_check_failure ⇒ String
Use ReturnValuesOnConditionCheckFailure
to get the item attributes if
the ConditionCheck
condition fails. For
ReturnValuesOnConditionCheckFailure
, the valid values are: NONE and
ALL_OLD.
Possible values:
- ALL_OLD
- NONE
#table_name ⇒ String
Name of the table for the check item request.