Trait RelationMeta 

pub trait RelationMeta {
    type Owner: Model;
    type Target: Model;

    const NAME: &'static str;
    const KIND: RelationKind;
    const LOCAL_KEY: &'static str;
    const FOREIGN_KEY: &'static str;
}

Each relation emitted by codegen materializes as a zero-sized type implementing this trait. Owner is the model declaring the relation; Target is the related model. LOCAL_KEY is the column on Owner that references Target (for BelongsTo); FOREIGN_KEY is the column on Target that references Owner’s PK (for HasMany / HasOne).

Required Associated Constants

const NAME: &'static str

Field name on Owner (also the string key of the matching super::IncludeSpec).

const KIND: RelationKind

Classification of this relation (see RelationKind).

const LOCAL_KEY: &'static str

Column on Owner that references Target (used for BelongsTo). For HasMany / HasOne this is conventionally "id".

const FOREIGN_KEY: &'static str

Column on Target that references Owner’s PK (used for HasMany / HasOne). For BelongsTo this is conventionally "id".

Required Associated Types

type Owner: Model

The model declaring the relation.

type Target: Model

The related model.

Dyn Compatibility

This trait is not dyn compatible.

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

Implementors