Struct aws_sdk_dynamodb::types::ConditionCheck
source · #[non_exhaustive]pub struct ConditionCheck {
pub key: HashMap<String, AttributeValue>,
pub table_name: String,
pub condition_expression: String,
pub expression_attribute_names: Option<HashMap<String, String>>,
pub expression_attribute_values: Option<HashMap<String, AttributeValue>>,
pub return_values_on_condition_check_failure: Option<ReturnValuesOnConditionCheckFailure>,
}
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 (Non-exhaustive)§
This struct is marked as non-exhaustive
Struct { .. }
syntax; cannot be matched against without a wildcard ..
; and struct update syntax will not work.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.
table_name: String
Name of the table for the check item request.
condition_expression: String
A condition that must be satisfied in order for a conditional update to succeed. For more information, see Condition expressions in the Amazon DynamoDB Developer Guide.
expression_attribute_names: Option<HashMap<String, String>>
One or more substitution tokens for attribute names in an expression. For more information, see Expression attribute names in the Amazon DynamoDB Developer Guide.
expression_attribute_values: Option<HashMap<String, AttributeValue>>
One or more values that can be substituted in an expression. For more information, see Condition expressions in the Amazon DynamoDB Developer Guide.
return_values_on_condition_check_failure: Option<ReturnValuesOnConditionCheckFailure>
Use ReturnValuesOnConditionCheckFailure
to get the item attributes if the ConditionCheck
condition fails. For ReturnValuesOnConditionCheckFailure
, the valid values are: NONE and ALL_OLD.
Implementations§
source§impl ConditionCheck
impl ConditionCheck
sourcepub fn key(&self) -> &HashMap<String, AttributeValue>
pub fn key(&self) -> &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.
sourcepub fn table_name(&self) -> &str
pub fn table_name(&self) -> &str
Name of the table for the check item request.
sourcepub fn condition_expression(&self) -> &str
pub fn condition_expression(&self) -> &str
A condition that must be satisfied in order for a conditional update to succeed. For more information, see Condition expressions in the Amazon DynamoDB Developer Guide.
sourcepub fn expression_attribute_names(&self) -> Option<&HashMap<String, String>>
pub fn expression_attribute_names(&self) -> Option<&HashMap<String, String>>
One or more substitution tokens for attribute names in an expression. For more information, see Expression attribute names in the Amazon DynamoDB Developer Guide.
sourcepub fn expression_attribute_values(
&self
) -> Option<&HashMap<String, AttributeValue>>
pub fn expression_attribute_values( &self ) -> Option<&HashMap<String, AttributeValue>>
One or more values that can be substituted in an expression. For more information, see Condition expressions in the Amazon DynamoDB Developer Guide.
sourcepub fn return_values_on_condition_check_failure(
&self
) -> Option<&ReturnValuesOnConditionCheckFailure>
pub fn return_values_on_condition_check_failure( &self ) -> Option<&ReturnValuesOnConditionCheckFailure>
Use ReturnValuesOnConditionCheckFailure
to get the item attributes if the ConditionCheck
condition fails. For ReturnValuesOnConditionCheckFailure
, the valid values are: NONE and ALL_OLD.
source§impl ConditionCheck
impl ConditionCheck
sourcepub fn builder() -> ConditionCheckBuilder
pub fn builder() -> ConditionCheckBuilder
Creates a new builder-style object to manufacture ConditionCheck
.
Trait Implementations§
source§impl Clone for ConditionCheck
impl Clone for ConditionCheck
source§fn clone(&self) -> ConditionCheck
fn clone(&self) -> ConditionCheck
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for ConditionCheck
impl Debug for ConditionCheck
source§impl PartialEq for ConditionCheck
impl PartialEq for ConditionCheck
source§fn eq(&self, other: &ConditionCheck) -> bool
fn eq(&self, other: &ConditionCheck) -> bool
self
and other
values to be equal, and is used
by ==
.