Enum CursorValue 

pub enum CursorValue {
    String(String),
    Int(i64),
    Float(f64),
    Uuid(String),
}

The value a cursor points at.

Serialized as a bare JSON number or string, except CursorValue::Uuid, which is serialized as {"uuid": "..."} so that the variant survives an encode/decode round trip and PostgreSQL still receives the ::uuid cast. Cursors issued by older versions (a bare string for UUIDs) decode as CursorValue::String.

Variants

String(String)

Int(i64)

Float(f64)

Uuid(String)

UUID value stored as string, will be cast to UUID in SQL

Implementations

impl CursorValue

pub fn from_json(value: &Value, template: Option<&CursorValue>) -> Option<Self>

Convert a JSON value, typically one field of a serialized row, into a cursor value.

template is an existing cursor value on the same field; when given, string values keep its String/Uuid variant and integers keep a Float variant. Without a template, strings shaped like a UUID become CursorValue::Uuid. Booleans, nulls, arrays, and objects cannot be cursor values.

Trait Implementations

impl Clone for CursorValue

fn clone(&self) -> CursorValue

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CursorValue

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for CursorValue

fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error>

Deserialize this value from the given Serde deserializer.

impl PartialEq for CursorValue

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for CursorValue

fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for CursorValue