Enum Value

Source

pub enum Value {
    Int(i64),
    Bool(bool),
    String(String),
    Binary(Vec<u8>),
    Table(Vec<Row<'static>>),
    Timestamp(DateTime<Utc>),
    Float(f32),
    Double(f64),
    Link(Link),
    LinkList(Vec<Link>),
    BackLink(Backlink),
    None,
    // some variants omitted
}

Expand description

A single value from a Realm database. Represents one row in one column.

Variants§

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Int(i64)

A signed integer value. Integers may be nullable in Realm, in which case they are represented as None.

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Bool(bool)

A boolean value. Booleans may be nullable in Realm, in which case they are represented as None.

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String(String)

A string value. Strings may be nullable in Realm, in which case they are represented as None.

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Binary(Vec<u8>)

A binary blob value. Binary blobs may be nullable in Realm, in which case they are represented as None.

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Table(Vec<Row<'static>>)

A subtable value. Tables in Realm may have a column that contains an entire table. In that case, upon loading the row, the subtable and all its rows are loaded.

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Timestamp(DateTime<Utc>)

A timestamp value, represented using the chrono crate. Timestamps may be nullable in Realm, in which case they are represented as None.

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Float(f32)

A floating-point value.

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Double(f64)

A double-precision floating-point value.

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Link(Link)

A link to a row in a given table. If the link is null, it is represented as None.

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LinkList(Vec<Link>)

A list of links to rows in a given table. If a row has no links, this will be an empty list.

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BackLink(Backlink)

A backlink. In cases where table A maintains a link (see Link or LinkList), table B maintains a backlink to table A. You can use this to navigate back to the parent row in a has-one relationship.

Backlinks may be nullable in Realm, in which case they are represented as None.

Backlinks are special, as their containing columns are unnamed, and thus cannot be retrieved using Row::get. Instead, you can use Row::backlinks to retrieve the backlinks. See the documentation for realm_model! for how to incorporate backlinks into your model classes.

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None

A null value.

Enum ValueCopy item path

Variants§

Int(i64)

Bool(bool)

String(String)

Binary(Vec<u8>)

Table(Vec<Row<'static>>)

Timestamp(DateTime<Utc>)

Float(f32)

Double(f64)

Link(Link)

LinkList(Vec<Link>)

BackLink(Backlink)

None

Implementations§

impl Value

pub fn is_none(&self) -> bool

Trait Implementations§

impl Clone for Value

fn clone(&self) -> Value

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

impl Debug for Value

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

impl From<&str> for Value

fn from(value: &str) -> Self

impl From<Backlink> for Value

fn from(value: Backlink) -> Self

impl From<DateTime<Utc>> for Value

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

impl From<Link> for Value

fn from(value: Link) -> Self

impl<T> From<Option<T>> for Valuewhere T: Into<Value>,

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

impl From<String> for Value

fn from(value: String) -> Self

impl From<Vec<Link>> for Value

fn from(value: Vec<Link>) -> Self

impl From<Vec<Row<'static>>> for Value

fn from(value: Vec<Row<'static>>) -> Self

impl From<bool> for Value

fn from(value: bool) -> Self

impl From<f32> for Value

fn from(value: f32) -> Self

impl From<f64> for Value

fn from(value: f64) -> Self

impl From<i64> for Value

fn from(value: i64) -> Self

impl TryFrom<Value> for Backlink

type Error = ValueError

fn try_from(value: Value) -> Result<Self, Self::Error>

impl TryFrom<Value> for DateTime<Utc>

type Error = ValueError

fn try_from(value: Value) -> Result<Self, Self::Error>

impl TryFrom<Value> for Link

type Error = ValueError

fn try_from(value: Value) -> Result<Self, Self::Error>

impl TryFrom<Value> for Option<DateTime<Utc>>

type Error = ValueError

fn try_from(value: Value) -> Result<Self, Self::Error>

impl TryFrom<Value> for Option<Link>

type Error = ValueError

fn try_from(value: Value) -> Result<Self, Self::Error>

impl TryFrom<Value> for Option<String>

type Error = ValueError

fn try_from(value: Value) -> Result<Self, Self::Error>

impl TryFrom<Value> for Option<i64>

type Error = ValueError

fn try_from(value: Value) -> Result<Self, Self::Error>

impl TryFrom<Value> for String

type Error = ValueError

fn try_from(value: Value) -> Result<Self, Self::Error>

impl<'a, T> TryFrom<Value> for Vec<T>where T: TryFrom<Row<'a>>, T::Error: Error + 'static,

type Error = ValueError

fn try_from(value: Value) -> Result<Self, Self::Error>

impl TryFrom<Value> for bool

type Error = ValueError

fn try_from(value: Value) -> Result<Self, Self::Error>

impl TryFrom<Value> for f32

type Error = ValueError

fn try_from(value: Value) -> Result<Self, Self::Error>

Enum Value

impl<T> From<Option<T>> for Value
where T: Into<Value>,

impl<'a, T> TryFrom<Value> for Vec<T>
where T: TryFrom<Row<'a>>, T::Error: Error + 'static,

impl<T> Any for T
where T: 'static + ?Sized,

impl<T> Borrow<T> for T
where T: ?Sized,

impl<T> BorrowMut<T> for T
where T: ?Sized,

impl<T> CloneToUninit for T
where T: Clone,

impl<T, U> Into<U> for T
where U: From<T>,

impl<T> ToOwned for T
where T: Clone,

impl<T, U> TryFrom<U> for T
where U: Into<T>,

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,