Struct Update

pub struct Update {
    pub condition_expression: Option<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,
    pub update_expression: String,
}

Represents a request to perform an UpdateItem operation.

Fields

condition_expression: Option<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 updated. 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 Update condition fails. For ReturnValuesOnConditionCheckFailure, the valid values are: NONE, ALL_OLD, UPDATED_OLD, ALL_NEW, UPDATED_NEW.

table_name: String

Name of the table for the UpdateItem request.

update_expression: String

An expression that defines one or more attributes to be updated, the action to be performed on them, and new value(s) for them.

Trait Implementations

impl Clone for Update

fn clone(&self) -> Update

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Update

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

Formats the value using the given formatter.

impl Default for Update

fn default() -> Update

Returns the “default value” for a type.

impl PartialEq for Update

fn eq(&self, other: &Update) -> 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 Update

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 Update