Trait FromSqlRef 

pub trait FromSqlRef<'a, A, DB: Backend>: Sized {
    // Required method
    fn from_sql(bytes: DB::RawValue<'a>) -> Result<Self>;
}

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.

A helper trait for deserializing data in a borrowed variant

This is mostly useful for getting a &str or &[u8] in your code

Required Methods

fn from_sql(bytes: DB::RawValue<'a>) -> Result<Self>

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl<'a> FromSqlRef<'a, Binary, Mysql> for &'a [u8]

Available on crate feature mysql_backend only.

fn from_sql(bytes: MysqlValue<'a>) -> Result<Self>

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.

impl<'a> FromSqlRef<'a, Binary, Pg> for &'a [u8]

Available on crate feature postgres_backend only.

fn from_sql(bytes: PgValue<'a>) -> Result<Self>

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.

impl<'a> FromSqlRef<'a, Binary, Sqlite> for &'a [u8]

Available on crate feature __sqlite-shared only.

fn from_sql(value: SqliteValue<'a, 'a, 'a>) -> Result<Self>

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.

impl<'a> FromSqlRef<'a, Text, Mysql> for &'a str

Available on crate feature mysql_backend only.

fn from_sql(bytes: MysqlValue<'a>) -> Result<Self>

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.

impl<'a> FromSqlRef<'a, Text, Pg> for &'a str

Available on crate feature postgres_backend only.

fn from_sql(value: PgValue<'a>) -> Result<Self>

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.

impl<'a> FromSqlRef<'a, Text, Sqlite> for &'a str

Available on crate feature __sqlite-shared only.

fn from_sql(value: SqliteValue<'a, 'a, 'a>) -> Result<Self>

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.

Implementors