Struct ConditionCheck

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,
}

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

impl Clone for ConditionCheck

fn clone(&self) -> ConditionCheck

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ConditionCheck

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ConditionCheck

fn default() -> ConditionCheck

Returns the “default value” for a type.

impl PartialEq for ConditionCheck

fn eq(&self, other: &ConditionCheck) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for ConditionCheck

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ConditionCheck