Struct IntMapping 

pub struct IntMapping<T, ST>(/* private fields */);

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

Map enum variants to INTEGER (in different sizes) by converting each variant to the relevant discriminant value

The generic type T specifies the Rust side integer type, while the generic type ST specifies the SQL side integer type. Both need to match

This mapping variant requires to specify explicit discriminant values for all enum variants

Trait Implementations

impl<T: Debug, ST: Debug> Debug for IntMapping<T, ST>

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

Formats the value using the given formatter.

impl<T, ST, DB> EnumMapping<DB> for IntMapping<T, ST>

where for<'a> DB: Backend<BindCollector<'a> = RawBytesBindCollector<DB>>, T: ToSql<ST, DB> + FromSql<ST, DB>, i128: TryInto<T, Error: Display> + TryFrom<T, Error: Display>,

fn map_to_database_value<'b>( output: &mut Output<'b, '_, DB>, variant: &'static EnumVariant, ) -> Result

Map an enum variant to the database representation

fn map_from_database_value( raw: <DB as Backend>::RawValue<'_>, type_name: &'static str, variants: &'static [EnumVariant], ) -> Result<usize>

Construct an enum variant from the database representation

impl<T, ST> EnumMapping<Sqlite> for IntMapping<T, ST>

where T: ToSql<ST, Sqlite> + FromSql<ST, Sqlite>, for<'a> SqliteBindValue<'a>: From<T>, i128: TryInto<T, Error: Display> + TryFrom<T, Error: Display>,

Available on crate feature __sqlite-shared only.

fn map_to_database_value<'b>( output: &mut Output<'b, '_, Sqlite>, variant: &'static EnumVariant, ) -> Result

Map an enum variant to the database representation

fn map_from_database_value( raw: SqliteValue<'_, '_, '_>, type_name: &'static str, variants: &'static [EnumVariant], ) -> Result<usize>

Construct an enum variant from the database representation