Struct RelationDef 

pub struct RelationDef {
    pub name: &'static str,
    pub from_entity: &'static str,
    pub to_entity: &'static str,
    pub from_key: &'static str,
    pub to_key: &'static str,
    pub kind: RelationKind,
}

关联关系定义（零分配，编译期常量）

描述两个实体间的关联关系，包含外键映射信息。 所有字段为 &'static str，运行时零分配。

Fields

name: &'static str

关联名称（如 “orders”、“profile”）

from_entity: &'static str

源实体表名（如 “users”）

to_entity: &'static str

目标实体表名（如 “orders”）

from_key: &'static str

源实体键列名（通常为主键，如 “id”）

to_key: &'static str

目标实体外键列名（如 “user_id”）

kind: RelationKind

关联类型

Implementations

impl RelationDef

pub const fn new( name: &'static str, from_entity: &'static str, to_entity: &'static str, from_key: &'static str, to_key: &'static str, kind: RelationKind, ) -> Self

创建关联关系定义

Trait Implementations

impl Clone for RelationDef

fn clone(&self) -> RelationDef

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for RelationDef

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.