Trait RowIndex 

pub trait RowIndex<I> {
    // Required method
    fn idx(&self, idx: I) -> Option<usize>;
}

Representing a way to index into database rows

• Crates using existing backends should use existing implementations of this traits. Diesel provides RowIndex<usize> and RowIndex<&str> for all built-in backends

• Crates implementing custom backends need to provide RowIndex<usize> and RowIndex<&str> impls for their Row type.

Required Methods

fn idx(&self, idx: I) -> Option<usize>

Get the numeric index inside the current row for the provided index value

Dyn Compatibility

This trait is dyn compatible.

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

Implementors

impl<'a, R> RowIndex<&'a str> for PartialRow<'_, R>

where R: RowIndex<&'a str>,

impl<R> RowIndex<usize> for PartialRow<'_, R>

where R: RowIndex<usize>,