Trait TryGetable 

pub trait TryGetable: Sized {
    // Required method
    fn try_get_by<I>(res: &QueryResult, index: I) -> Result<Self, TryGetError>
       where I: ColIdx;

    // Provided methods
    fn try_get(
        res: &QueryResult,
        pre: &str,
        col: &str,
    ) -> Result<Self, TryGetError> { ... }
    fn try_get_by_index(
        res: &QueryResult,
        index: usize,
    ) -> Result<Self, TryGetError> { ... }
}

An interface to get a value from the query result

Required Methods

fn try_get_by<I>(res: &QueryResult, index: I) -> Result<Self, TryGetError>

where I: ColIdx,

Get a value from the query result with an ColIdx

Provided Methods

fn try_get(res: &QueryResult, pre: &str, col: &str) -> Result<Self, TryGetError>

Get a value from the query result with prefixed column name

fn try_get_by_index( res: &QueryResult, index: usize, ) -> Result<Self, TryGetError>

Get a value from the query result based on the order in the select expressions

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 TryGetable for bool

fn try_get_by<I>(res: &QueryResult, idx: I) -> Result<bool, TryGetError>

where I: ColIdx,

impl TryGetable for f32

fn try_get_by<I>(res: &QueryResult, idx: I) -> Result<f32, TryGetError>

where I: ColIdx,

impl TryGetable for f64

fn try_get_by<I>(res: &QueryResult, idx: I) -> Result<f64, TryGetError>

where I: ColIdx,

impl TryGetable for i8

fn try_get_by<I>(res: &QueryResult, idx: I) -> Result<i8, TryGetError>

where I: ColIdx,

impl TryGetable for i16

fn try_get_by<I>(res: &QueryResult, idx: I) -> Result<i16, TryGetError>

where I: ColIdx,

impl TryGetable for i32

fn try_get_by<I>(res: &QueryResult, idx: I) -> Result<i32, TryGetError>

where I: ColIdx,

impl TryGetable for i64

fn try_get_by<I>(res: &QueryResult, idx: I) -> Result<i64, TryGetError>

where I: ColIdx,

impl TryGetable for u8

fn try_get_by<I>(res: &QueryResult, idx: I) -> Result<u8, TryGetError>

where I: ColIdx,

impl TryGetable for u16

fn try_get_by<I>(res: &QueryResult, idx: I) -> Result<u16, TryGetError>

where I: ColIdx,

impl TryGetable for u32

fn try_get_by<I>(res: &QueryResult, idx: I) -> Result<u32, TryGetError>

where I: ColIdx,

impl TryGetable for u64

fn try_get_by<I>(res: &QueryResult, idx: I) -> Result<u64, TryGetError>

where I: ColIdx,

impl TryGetable for String

fn try_get_by<I>(res: &QueryResult, idx: I) -> Result<String, TryGetError>

where I: ColIdx,

impl TryGetable for Vec<u8>

fn try_get_by<I>(res: &QueryResult, idx: I) -> Result<Vec<u8>, TryGetError>

where I: ColIdx,

impl<T> TryGetable for Option<T>

where T: TryGetable,

fn try_get_by<I>(res: &QueryResult, index: I) -> Result<Option<T>, TryGetError>

where I: ColIdx,

impl<T> TryGetable for Vec<T>

where T: TryGetableArray,

fn try_get_by<I>(res: &QueryResult, index: I) -> Result<Vec<T>, TryGetError>

where I: ColIdx,

Implementors

impl TryGetable for Value

impl TryGetable for NaiveDate

impl TryGetable for NaiveDateTime

impl TryGetable for NaiveTime

impl TryGetable for DateTime<FixedOffset>

impl TryGetable for DateTime<Local>

impl TryGetable for DateTime<Utc>

impl<T> TryGetable for T

where T: TryGetableFromJson,

Available on crate feature with-json only.