Trait DbType 

pub trait DbType:
    Sized
    + Send
    + Sync
    + 'static {
    const SQL_TYPE: SqlType;
    const NULLABLE: bool = false;

    // Required methods
    fn to_value(&self) -> Value;
    fn from_value(value: Value) -> Result<Self, String>;
}

A Rust type that can be stored in a model column.

Required Associated Constants

const SQL_TYPE: SqlType

Column type family.

Provided Associated Constants

const NULLABLE: bool = false

Whether the column accepts NULL (true only for Option<T>).

Required Methods

fn to_value(&self) -> Value

Convert to a bind value.

fn from_value(value: Value) -> Result<Self, String>

Decode from a value read from any backend.

Errors

A human-readable reason when value has the wrong shape; callers wrap it into QueryError::Decode with the column name.

Dyn Compatibility

This trait is not dyn compatible.

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

Implementations on Foreign Types

impl DbType for DateTime<Utc>

const SQL_TYPE: SqlType = SqlType::Timestamp

fn to_value(&self) -> Value

fn from_value(value: Value) -> Result<Self, String>

impl DbType for Decimal

const SQL_TYPE: SqlType = SqlType::Decimal

fn to_value(&self) -> Value

fn from_value(value: Value) -> Result<Self, String>

impl DbType for IpAddr

const SQL_TYPE: SqlType = SqlType::IpAddr

fn to_value(&self) -> Value

fn from_value(value: Value) -> Result<Self, String>

impl DbType for NaiveDate

const SQL_TYPE: SqlType = SqlType::Date

fn to_value(&self) -> Value

fn from_value(value: Value) -> Result<Self, String>

impl DbType for NaiveTime

const SQL_TYPE: SqlType = SqlType::Time

fn to_value(&self) -> Value

fn from_value(value: Value) -> Result<Self, String>

impl DbType for String

const SQL_TYPE: SqlType = SqlType::Text

fn to_value(&self) -> Value

fn from_value(value: Value) -> Result<Self, String>

impl DbType for TimeDelta

const SQL_TYPE: SqlType = SqlType::Duration

fn to_value(&self) -> Value

fn from_value(value: Value) -> Result<Self, String>

impl DbType for Uuid

const SQL_TYPE: SqlType = SqlType::Uuid

fn to_value(&self) -> Value

fn from_value(value: Value) -> Result<Self, String>

impl DbType for Value

const SQL_TYPE: SqlType = SqlType::Json

fn to_value(&self) -> Value

fn from_value(value: Value) -> Result<Self, String>

impl DbType for Vec<u8>

const SQL_TYPE: SqlType = SqlType::Binary

fn to_value(&self) -> Value

fn from_value(value: Value) -> Result<Self, String>

impl DbType for bool

const SQL_TYPE: SqlType = SqlType::Bool

fn to_value(&self) -> Value

fn from_value(value: Value) -> Result<Self, String>

impl DbType for f32

const SQL_TYPE: SqlType = SqlType::Real

fn to_value(&self) -> Value

fn from_value(value: Value) -> Result<Self, String>

impl DbType for f64

const SQL_TYPE: SqlType = SqlType::Double

fn to_value(&self) -> Value

fn from_value(value: Value) -> Result<Self, String>

impl DbType for i16

const SQL_TYPE: SqlType = SqlType::SmallInt

fn to_value(&self) -> Value

fn from_value(value: Value) -> Result<Self, String>

impl DbType for i32

const SQL_TYPE: SqlType = SqlType::Integer

fn to_value(&self) -> Value

fn from_value(value: Value) -> Result<Self, String>

impl DbType for i64

const SQL_TYPE: SqlType = SqlType::BigInt

fn to_value(&self) -> Value

fn from_value(value: Value) -> Result<Self, String>

impl<T: DbType> DbType for Option<T>

const SQL_TYPE: SqlType = T::SQL_TYPE

const NULLABLE: bool = true

fn to_value(&self) -> Value

fn from_value(value: Value) -> Result<Self, String>

Implementors

impl<T: Model> DbType for ForeignKey<T>

const SQL_TYPE: SqlType = <T::Pk as DbType>::SQL_TYPE