Trait PrimaryKeyArity 

pub trait PrimaryKeyArity {
    const ARITY: usize;
}

Number of columns a primary key spans — 1 for a single-column key, n for a composite key represented as an n-tuple.

Required Associated Constants

const ARITY: usize

Number of columns in the primary key.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl<T1: TryGetableMany, T2: TryGetableMany, T3: TryGetableMany, T4: TryGetableMany, T5: TryGetableMany, T6: TryGetableMany, T7: TryGetableMany, T8: TryGetableMany, T9: TryGetableMany, T10: TryGetableMany, T11: TryGetableMany, T12: TryGetableMany> PrimaryKeyArity for (T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12)

const ARITY: usize = 12

impl<T1: TryGetableMany, T2: TryGetableMany, T3: TryGetableMany, T4: TryGetableMany, T5: TryGetableMany, T6: TryGetableMany, T7: TryGetableMany, T8: TryGetableMany, T9: TryGetableMany, T10: TryGetableMany, T11: TryGetableMany> PrimaryKeyArity for (T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11)

const ARITY: usize = 11

impl<T1: TryGetableMany, T2: TryGetableMany, T3: TryGetableMany, T4: TryGetableMany, T5: TryGetableMany, T6: TryGetableMany, T7: TryGetableMany, T8: TryGetableMany, T9: TryGetableMany, T10: TryGetableMany> PrimaryKeyArity for (T1, T2, T3, T4, T5, T6, T7, T8, T9, T10)

const ARITY: usize = 10

impl<T1: TryGetableMany, T2: TryGetableMany, T3: TryGetableMany, T4: TryGetableMany, T5: TryGetableMany, T6: TryGetableMany, T7: TryGetableMany, T8: TryGetableMany, T9: TryGetableMany> PrimaryKeyArity for (T1, T2, T3, T4, T5, T6, T7, T8, T9)

const ARITY: usize = 9

impl<T1: TryGetableMany, T2: TryGetableMany, T3: TryGetableMany, T4: TryGetableMany, T5: TryGetableMany, T6: TryGetableMany, T7: TryGetableMany, T8: TryGetableMany> PrimaryKeyArity for (T1, T2, T3, T4, T5, T6, T7, T8)

const ARITY: usize = 8

impl<T1: TryGetableMany, T2: TryGetableMany, T3: TryGetableMany, T4: TryGetableMany, T5: TryGetableMany, T6: TryGetableMany, T7: TryGetableMany> PrimaryKeyArity for (T1, T2, T3, T4, T5, T6, T7)

const ARITY: usize = 7

impl<T1: TryGetableMany, T2: TryGetableMany, T3: TryGetableMany, T4: TryGetableMany, T5: TryGetableMany, T6: TryGetableMany> PrimaryKeyArity for (T1, T2, T3, T4, T5, T6)

const ARITY: usize = 6

impl<T1: TryGetableMany, T2: TryGetableMany, T3: TryGetableMany, T4: TryGetableMany, T5: TryGetableMany> PrimaryKeyArity for (T1, T2, T3, T4, T5)

const ARITY: usize = 5

impl<T1: TryGetableMany, T2: TryGetableMany, T3: TryGetableMany, T4: TryGetableMany> PrimaryKeyArity for (T1, T2, T3, T4)

const ARITY: usize = 4

impl<T1: TryGetableMany, T2: TryGetableMany, T3: TryGetableMany> PrimaryKeyArity for (T1, T2, T3)

const ARITY: usize = 3

impl<T1: TryGetableMany, T2: TryGetableMany> PrimaryKeyArity for (T1, T2)

const ARITY: usize = 2

impl<T1: TryGetableMany> PrimaryKeyArity for (T1,)

const ARITY: usize = 1

Implementors

impl<V> PrimaryKeyArity for V

where V: TryGetable,

const ARITY: usize = 1