Trait FromSql

pub trait FromSql: Sized {
    // Required method
    fn from_sql(row: &ResultRow<'_, '_>, col: ColIx) -> SqliteResult<Self>;
}

A trait for result values from a query.

cf sqlite3 result values.

inspired by sfackler’s FromSql (and some haskell bindings?)

• TODO: many more implementors, including Option

Required Methods

fn from_sql(row: &ResultRow<'_, '_>, col: ColIx) -> SqliteResult<Self>

Try to extract a Self type value from the colth colum of a ResultRow.

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 FromSql for bool

fn from_sql(row: &ResultRow<'_, '_>, col: ColIx) -> SqliteResult<bool>

impl FromSql for f64

fn from_sql(row: &ResultRow<'_, '_>, col: ColIx) -> SqliteResult<f64>

impl FromSql for i32

fn from_sql(row: &ResultRow<'_, '_>, col: ColIx) -> SqliteResult<i32>

impl FromSql for i64

fn from_sql(row: &ResultRow<'_, '_>, col: ColIx) -> SqliteResult<i64>

impl FromSql for String

fn from_sql(row: &ResultRow<'_, '_>, col: ColIx) -> SqliteResult<String>

impl FromSql for Vec<u8>

fn from_sql(row: &ResultRow<'_, '_>, col: ColIx) -> SqliteResult<Vec<u8>>

impl FromSql for Timespec

fn from_sql(row: &ResultRow<'_, '_>, col: ColIx) -> SqliteResult<Timespec>

TODO: propagate error message

impl FromSql for Tm

fn from_sql(row: &ResultRow<'_, '_>, col: ColIx) -> SqliteResult<Tm>

impl<T: FromSql + Clone> FromSql for Option<T>

fn from_sql(row: &ResultRow<'_, '_>, col: ColIx) -> SqliteResult<Option<T>>

Implementors