Enum ViewTransform 

pub enum ViewTransform {
    Filter {
        predicate: Predicate,
    },
    Sort {
        key: FieldPath,
        order: SortOrder,
    },
    Take {
        count: usize,
    },
    Skip {
        count: usize,
    },
    First,
    Last,
    MaxBy {
        key: FieldPath,
    },
    MinBy {
        key: FieldPath,
    },
}

Transform operation in a view pipeline

Variants

Filter

Filter entities matching a predicate

Fields

predicate: Predicate

Sort

Sort entities by a field

Fields

key: FieldPath

order: SortOrder

Take

Take first N entities (after sort)

Fields

count: usize

Skip

Skip first N entities

Fields

count: usize

First

Take only the first entity (after sort) - produces Single output

Last

Take only the last entity (after sort) - produces Single output

MaxBy

Get entity with maximum value for field - produces Single output

Fields

key: FieldPath

MinBy

Get entity with minimum value for field - produces Single output

Fields

key: FieldPath

Trait Implementations

impl Clone for ViewTransform

fn clone(&self) -> ViewTransform

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ViewTransform

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ViewTransform

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for ViewTransform

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

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 ViewTransform