Struct EntityGraph 

pub struct EntityGraph { /* private fields */ }

实体图

描述一组关联关系的抓取计划。

示例

use sz_orm_core::entity_graph::EntityGraph;

let mut graph = EntityGraph::new();
graph.add_edge("user", "profile");
graph.add_edge("user", "posts");

Implementations

impl EntityGraph

pub fn new() -> Self

创建空实体图

pub fn add_edge( &mut self, parent_field: impl Into<String>, relation: impl Into<String>, ) -> &mut Self

添加一条边

pub fn add_edge_with_graph( &mut self, parent_field: impl Into<String>, relation: impl Into<String>, sub_graph: EntityGraph, ) -> &mut Self

添加一条带子图的边（嵌套抓取）

pub fn edges(&self) -> &[GraphEdge]

返回所有边

pub fn edge_count(&self) -> usize

返回边的数量

pub fn relations_of(&self, parent_field: &str) -> Vec<&GraphEdge>

查询某个父字段的所有关联

pub fn all_relations(&self) -> Vec<String>

收集图中所有关联名（去重）

pub fn all_parent_fields(&self) -> Vec<String>

收集图中所有父字段（去重）

pub fn is_empty(&self) -> bool

是否为空图

pub fn all_relations_recursive(&self) -> Vec<String>

递归收集图中所有关联（含子图）

Trait Implementations

impl Clone for EntityGraph

fn clone(&self) -> EntityGraph

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EntityGraph

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

Formats the value using the given formatter.

impl Default for EntityGraph

fn default() -> EntityGraph

Returns the “default value” for a type.