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MigrateFrom

ix_schema

Trait MigrateFrom 

Source 
pub trait MigrateFrom<Prev: Ix>: Ix + Sized {
    // Required method
    fn migrate_from(prev: Prev) -> Self;
}
Expand description

A type-safe, compile-time migration edge from an older schema version Prev.

Modelled after From: V2: MigrateFrom<V1> declares that a V1 value can be lifted to V2. The derive macro generates the body field-by-field, so an impossible transformation becomes a type error, not a runtime panic.

Required Methods§

Source

fn migrate_from(prev: Prev) -> Self

Lift a value of the previous schema version into this one.

Dyn Compatibility§

This trait is not dyn compatible.

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

Implementors§