Enum DataSource 

pub enum DataSource {
    Mongo,
    Sql(Backend),
}

一个 schema 的底层数据源

Variants

Mongo

MongoDB —— 走 Mongo 原生驱动路径

Sql(Backend)

关系型 SQL 后端 —— 命令经 dialect 翻译后执行

Implementations

impl DataSource

pub fn from_kind(kind: &str) -> Result<DataSource, String>

从数据源 kind 字符串解析（未知 → Err）

pub fn as_str(&self) -> &'static str

数据源 kind（与配置里的字符串一致，供绑定层序列化）

pub fn is_mongo(&self) -> bool

pub fn backend(&self) -> Option<Backend>

SQL 后端（Mongo 时为 None）

Trait Implementations

impl Clone for DataSource

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for DataSource

impl Debug for DataSource

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

Formats the value using the given formatter.

impl Eq for DataSource

impl PartialEq for DataSource

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for DataSource