Trait PartialModelTrait

pub trait PartialModelTrait: FromQueryResult {
    // Required method
    fn select_cols<S>(select: S) -> S
       where S: SelectColumns;

    // Provided method
    fn select_cols_nested<S>(select: S, _prefix: Option<&str>) -> S
       where S: SelectColumns { ... }
}

A trait for a part of Model

Required Methods

fn select_cols<S>(select: S) -> S

where S: SelectColumns,

Select specific columns this [PartialModel] needs

If you are implementing this by hand, please make sure to read the hints in the documentation for select_cols_nested and ensure to implement both methods.

Provided Methods

fn select_cols_nested<S>(select: S, _prefix: Option<&str>) -> S

where S: SelectColumns,

Used when nesting these structs into each other.

This will stop being a provided method in a future major release. Please implement this method manually when implementing this trait by hand, and ensure that your select_cols implementation is calling it with _prefix as None.

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<T> PartialModelTrait for Option<T>

where T: PartialModelTrait,

fn select_cols<S>(select: S) -> S

where S: SelectColumns,

fn select_cols_nested<S>(select: S, prefix: Option<&str>) -> S

where S: SelectColumns,

Implementors