Struct rusoto_dynamodb::ConditionCheck [−][src]
pub struct ConditionCheck { pub condition_expression: String, pub expression_attribute_names: Option<HashMap<String, String>>, pub expression_attribute_values: Option<HashMap<String, AttributeValue>>, pub key: HashMap<String, AttributeValue>, pub return_values_on_condition_check_failure: Option<String>, pub table_name: String, }
Expand description
Represents a request to perform a check that an item exists or to check the condition of specific attributes of the item.
Fields
condition_expression: String
A condition that must be satisfied in order for a conditional update to succeed.
expression_attribute_names: Option<HashMap<String, String>>
One or more substitution tokens for attribute names in an expression.
expression_attribute_values: Option<HashMap<String, AttributeValue>>
One or more values that can be substituted in an expression.
key: HashMap<String, 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: Option<String>
Use ReturnValuesOnConditionCheckFailure
to get the item attributes if the ConditionCheck
condition fails. For ReturnValuesOnConditionCheckFailure
, the valid values are: NONE and ALL_OLD.
table_name: String
Name of the table for the check item request.
Trait Implementations
Returns the “default value” for a type. Read more
This method tests for self
and other
values to be equal, and is used
by ==
. Read more
This method tests for !=
.
Auto Trait Implementations
impl RefUnwindSafe for ConditionCheck
impl Send for ConditionCheck
impl Sync for ConditionCheck
impl Unpin for ConditionCheck
impl UnwindSafe for ConditionCheck
Blanket Implementations
Mutably borrows from an owned value. Read more
Instruments this type with the provided Span
, returning an
Instrumented
wrapper. Read more
type Output = T
type Output = T
Should always be Self