Enum AttrValue 

#[non_exhaustive]
pub enum AttrValue {
    Null,
    Text(String),
    Int(i64),
    Float(f64),
    Bool(bool),
    DateTime(DateTime<Utc>),
    Json(Value),
}

One attribute’s value.

Non-exhaustive: variants are added as the storage layer learns to bind them, so match with a _ arm.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Null

No value. Stored as SQL NULL, distinct from an empty string.

Text(String)

Int(i64)

Float(f64)

Bool(bool)

DateTime(DateTime<Utc>)

An instant, always UTC. Rendered as RFC 3339 with microsecond precision, the one timestamp format the framework stores.

Json(Value)

Implementations

impl AttrValue

pub fn is_null(&self) -> bool

Whether this is AttrValue::Null.

pub fn to_text(&self) -> Option<String>

The storage text for this value, or None for AttrValue::Null.

This is the lossy bridge to the all-text write path; typed binding replaces it where the storage layer can bind a value natively.

pub fn as_str(&self) -> Option<&str>

The text, when this is AttrValue::Text.

pub fn as_int(&self) -> Option<i64>

The integer, when this is AttrValue::Int.

pub fn as_float(&self) -> Option<f64>

The float, when this is AttrValue::Float (or an AttrValue::Int, widened).

pub fn as_bool(&self) -> Option<bool>

The boolean, when this is AttrValue::Bool.

pub fn as_datetime(&self) -> Option<DateTime<Utc>>

The instant, when this is AttrValue::DateTime.

pub fn as_json(&self) -> Option<&Value>

The JSON, when this is AttrValue::Json.

Trait Implementations

impl Clone for AttrValue

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AttrValue

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

Formats the value using the given formatter.

impl From<&str> for AttrValue

fn from(v: &str) -> Self

Converts to this type from the input type.

impl From<DateTime<Utc>> for AttrValue

fn from(v: DateTime<Utc>) -> Self

Converts to this type from the input type.

impl<T: Into<AttrValue>> From<Option<T>> for AttrValue

None becomes AttrValue::Null, so an optional column reads naturally.

fn from(v: Option<T>) -> Self

Converts to this type from the input type.

impl From<String> for AttrValue

fn from(v: String) -> Self

Converts to this type from the input type.

impl From<Value> for AttrValue

fn from(v: Value) -> Self

Converts to this type from the input type.

impl From<bool> for AttrValue

fn from(v: bool) -> Self

Converts to this type from the input type.

impl From<f64> for AttrValue

fn from(v: f64) -> Self

Converts to this type from the input type.

impl From<i64> for AttrValue

fn from(v: i64) -> Self

Converts to this type from the input type.

impl PartialEq for AttrValue

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for AttrValue