Trait butane::FromSql

pub trait FromSql {
    // Required method
    fn from_sql_ref(val: SqlValRef<'_>) -> Result<Self, Error>
       where Self: Sized;

    // Provided method
    fn from_sql(val: SqlVal) -> Result<Self, Error>
       where Self: Sized { ... }
}

Used to convert a SqlVal or SqlValRef into another type.

The SqlVal is consumed.

Required Methods

fn from_sql_ref(val: SqlValRef<'_>) -> Result<Self, Error>where Self: Sized,

Used to convert a SqlValRef into another type.

Provided Methods

fn from_sql(val: SqlVal) -> Result<Self, Error>where Self: Sized,

Used to convert a SqlVal into another type. The default implementation calls Self::from_sql_ref(val.as_ref()), which may be inefficient. This method is chiefly used only for primary keys: a more efficient implementation is unlikely to provide benefits for types not used as primary keys.

Implementations on Foreign Types

impl FromSql for String

fn from_sql_ref(valref: SqlValRef<'_>) -> Result<String, Error>

fn from_sql(val: SqlVal) -> Result<String, Error>

impl<T> FromSql for HashMap<String, T, RandomState>where T: Clone + PartialEq<T> + for<'a> Deserialize<'a>,

fn from_sql_ref( val: SqlValRef<'_> ) -> Result<HashMap<String, T, RandomState>, Error>

impl FromSql for f64

fn from_sql_ref(valref: SqlValRef<'_>) -> Result<f64, Error>

fn from_sql(val: SqlVal) -> Result<f64, Error>

impl FromSql for NaiveDateTime

fn from_sql_ref(valref: SqlValRef<'_>) -> Result<NaiveDateTime, Error>

fn from_sql(val: SqlVal) -> Result<NaiveDateTime, Error>

impl FromSql for u32

fn from_sql_ref(valref: SqlValRef<'_>) -> Result<u32, Error>

fn from_sql(val: SqlVal) -> Result<u32, Error>

impl FromSql for Uuid

fn from_sql_ref(valref: SqlValRef<'_>) -> Result<Uuid, Error>

impl FromSql for bool

fn from_sql_ref(valref: SqlValRef<'_>) -> Result<bool, Error>

fn from_sql(val: SqlVal) -> Result<bool, Error>

impl FromSql for u16

fn from_sql_ref(valref: SqlValRef<'_>) -> Result<u16, Error>

fn from_sql(val: SqlVal) -> Result<u16, Error>

impl<T> FromSql for Option<T>where T: FromSql,

fn from_sql_ref(valref: SqlValRef<'_>) -> Result<Option<T>, Error>

impl FromSql for DateTime<Utc>

fn from_sql_ref(valref: SqlValRef<'_>) -> Result<DateTime<Utc>, Error>

fn from_sql(val: SqlVal) -> Result<DateTime<Utc>, Error>

impl FromSql for i64

fn from_sql_ref(valref: SqlValRef<'_>) -> Result<i64, Error>

fn from_sql(val: SqlVal) -> Result<i64, Error>

impl FromSql for Vec<u8, Global>

fn from_sql_ref(valref: SqlValRef<'_>) -> Result<Vec<u8, Global>, Error>

fn from_sql(val: SqlVal) -> Result<Vec<u8, Global>, Error>

impl FromSql for i16

fn from_sql_ref(valref: SqlValRef<'_>) -> Result<i16, Error>

fn from_sql(val: SqlVal) -> Result<i16, Error>

impl FromSql for u8

fn from_sql_ref(valref: SqlValRef<'_>) -> Result<u8, Error>

fn from_sql(val: SqlVal) -> Result<u8, Error>

impl FromSql for f32

fn from_sql_ref(valref: SqlValRef<'_>) -> Result<f32, Error>

fn from_sql(val: SqlVal) -> Result<f32, Error>

impl FromSql for Value

fn from_sql_ref(valref: SqlValRef<'_>) -> Result<Value, Error>

fn from_sql(val: SqlVal) -> Result<Value, Error>

impl FromSql for i32

fn from_sql_ref(valref: SqlValRef<'_>) -> Result<i32, Error>

fn from_sql(val: SqlVal) -> Result<i32, Error>

impl FromSql for i8

fn from_sql_ref(valref: SqlValRef<'_>) -> Result<i8, Error>

fn from_sql(val: SqlVal) -> Result<i8, Error>

Implementors

impl<T> FromSql for ForeignKey<T>where T: DataObject,