Struct TypedRow 

pub struct TypedRow<'a> { /* private fields */ }

A borrowed view of one row of a QueryResult that converts cells to typed Rust values. Obtain it with QueryResultExt::typed_row.

Implementations

impl TypedRow<'_>

pub fn get<T: FromSql>(&self, col: usize) -> Result<T>

Convert the cell in this row at column index col into T.

pub fn get_by_name<T: FromSql>(&self, name: &str) -> Result<T>

Convert the cell in this row at column name (case-insensitive) into T.

pub fn try_get<T: FromSql>(&self, col: usize) -> Result<T, ConversionError>

Convert the cell in this row at column index col into T, yielding the bare ConversionError on failure (unlike TypedRow::get, which wraps it in crate::Error). A SQL NULL cell is rejected with ConversionError::UnexpectedNull; use TypedRow::try_get_opt for a nullable column.

This is the accessor the #[derive(FromRow)]-generated code uses for non-Option tuple-struct fields. It is pub so generated code can call it; hand-written code usually wants TypedRow::get.

pub fn try_get_opt<T: FromSql>( &self, col: usize, ) -> Result<Option<T>, ConversionError>

Like TypedRow::try_get but for an Option<T> field: a SQL NULL cell becomes None. The accessor #[derive(FromRow)] uses for Option<T> tuple-struct fields.

pub fn try_get_by_name<T: FromSql>( &self, name: &str, ) -> Result<T, ConversionError>

Convert the cell in this row at column name (case-insensitive) into T, yielding the bare ConversionError on failure (unlike TypedRow::get_by_name, which wraps it in crate::Error). A SQL NULL cell is rejected with ConversionError::UnexpectedNull; use TypedRow::try_get_by_name_opt for a nullable column.

This is the accessor the #[derive(FromRow)]-generated code uses for non-Option named-field structs. It is pub so generated code can call it; hand-written code usually wants TypedRow::get_by_name.

pub fn try_get_by_name_opt<T: FromSql>( &self, name: &str, ) -> Result<Option<T>, ConversionError>

Like TypedRow::try_get_by_name but for an Option<T> field: a SQL NULL cell becomes None. The accessor #[derive(FromRow)] uses for Option<T> named-field structs.

Trait Implementations

impl<'a> Clone for TypedRow<'a>

fn clone(&self) -> TypedRow<'a>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a> Copy for TypedRow<'a>