Enum ReducerType 

pub enum ReducerType {
    Overwrite,
    Append,
    Extend,
    Merge {
        deep: bool,
    },
    LastN {
        n: usize,
    },
    First,
    Last,
    Custom(String),
}

Built-in reducer types

Variants

Overwrite

Overwrite the current value with the update (default)

Append

Append the update to a list (creates list if doesn’t exist)

Extend

Extend the current list with items from update list

Merge

Merge the update into the current object

Fields

deep: bool

Whether to deep merge nested objects

LastN

Keep only the last N items in a list

Fields

n: usize

Maximum number of items to keep

First

Take the first non-null value

Last

Take the last non-null value

Custom(String)

Custom reducer with a name identifier

Trait Implementations

impl Clone for ReducerType

fn clone(&self) -> ReducerType

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ReducerType

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

Formats the value using the given formatter.

impl Default for ReducerType

fn default() -> ReducerType

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ReducerType

fn deserialize<__D>( __deserializer: __D, ) -> Result<ReducerType, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for ReducerType

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

Formats the value using the given formatter.

impl PartialEq for ReducerType

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

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ReducerType