Trait Cast 

pub trait Cast: Sized {
    const COLUMNS: &'static [ColumnSpec];
    const NULLABLE: bool = false;
    const SENSITIVE: bool = false;
    const MOVES: Option<Moves<Self>> = None;
    const HOLDS_STATES: bool = _;

    // Required methods
    fn encode(&self, out: &mut Vec<SqlValue>);
    fn decode(row: &mut dyn ColumnReader) -> Result<Self>;

    // Provided method
    fn refuse_unlisted_move(
        field: &str,
        stored: &Self,
        current: &Self,
    ) -> Result<()> { ... }
}

Required Associated Constants

const COLUMNS: &'static [ColumnSpec]

Provided Associated Constants

const NULLABLE: bool = false

const SENSITIVE: bool = false

A field holding it is never filtered, sorted, listed or searched, as #[sensitive] ones.

const MOVES: Option<Moves<Self>> = None

Set for a value moving between listed states; a save of any other value skips the check.

const HOLDS_STATES: bool = _

Set when a state anywhere in the value is checked on save, as a field’s of several.

Required Methods

fn encode(&self, out: &mut Vec<SqlValue>)

fn decode(row: &mut dyn ColumnReader) -> Result<Self>

Provided Methods

fn refuse_unlisted_move( field: &str, stored: &Self, current: &Self, ) -> Result<()>

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl Cast for String

const COLUMNS: &'static [ColumnSpec]

fn encode(&self, out: &mut Vec<SqlValue>)

fn decode(row: &mut dyn ColumnReader) -> Result<Self>

impl Cast for bool

const COLUMNS: &'static [ColumnSpec]

fn encode(&self, out: &mut Vec<SqlValue>)

fn decode(row: &mut dyn ColumnReader) -> Result<Self>

impl Cast for f64

const COLUMNS: &'static [ColumnSpec]

fn encode(&self, out: &mut Vec<SqlValue>)

fn decode(row: &mut dyn ColumnReader) -> Result<Self>

impl Cast for i32

const COLUMNS: &'static [ColumnSpec]

fn encode(&self, out: &mut Vec<SqlValue>)

fn decode(row: &mut dyn ColumnReader) -> Result<Self>

impl Cast for i64

const COLUMNS: &'static [ColumnSpec]

fn encode(&self, out: &mut Vec<SqlValue>)

fn decode(row: &mut dyn ColumnReader) -> Result<Self>

impl<T: Cast> Cast for Option<T>

Only all-null columns read back as None, so an Option of a value that can be all nulls (an Option, or a value of several fields that are all optional) is refused when compiled:

use sofie_core::Cast;

let _ = <Option<Option<i64>>>::COLUMNS;

const COLUMNS: &'static [ColumnSpec]

const NULLABLE: bool = true

const SENSITIVE: bool = T::SENSITIVE

const MOVES: Option<Moves<Self>>

const HOLDS_STATES: bool = T::HOLDS_STATES

fn encode(&self, out: &mut Vec<SqlValue>)

fn decode(row: &mut dyn ColumnReader) -> Result<Self>

fn refuse_unlisted_move( field: &str, stored: &Self, current: &Self, ) -> Result<()>

Implementors

impl Cast for Date

const COLUMNS: &'static [ColumnSpec]

impl Cast for DateTime

const COLUMNS: &'static [ColumnSpec]

impl Cast for Timestamp

const COLUMNS: &'static [ColumnSpec]

impl Cast for Uuid

const COLUMNS: &'static [ColumnSpec]

impl<V: Value> Cast for V

const COLUMNS: &'static [ColumnSpec] = <V::Inner>::COLUMNS

const NULLABLE: bool = <V::Inner>::NULLABLE

const SENSITIVE: bool