Struct AttributeBehavior 

pub struct AttributeBehavior {
    pub name_str: &'static str,
    pub event: HookEvent,
    pub target_field: &'static str,
    pub generator: Box<dyn Fn(&HookContext) -> Value + Sync + Send>,
}

通用属性 Behavior — 在指定事件触发时通过闭包设置属性

示例

use sz_orm_model::behaviors::{AttributeBehavior, BehaviorRegistry, Behavior};
use sz_orm_model::hooks::{HookContext, HookEvent};
use sz_orm_model::Value;
use std::collections::HashMap;

let mut registry = BehaviorRegistry::new();
// 在 before_insert 时设置 uuid 字段
registry.register(Box::new(AttributeBehavior::new(
    "uuid_gen",
    HookEvent::BeforeInsert,
    "uuid",
    |_ctx| Value::String("auto-uuid".to_string()),
)));

let ctx = HookContext::default();
let mut attrs = HashMap::new();
registry.before_insert(&ctx, &mut attrs).unwrap();
assert_eq!(attrs.get("uuid"), Some(&Value::String("auto-uuid".to_string())));

Fields

name_str: &'static str

Behavior 名称

event: HookEvent

订阅的事件（仅在该事件触发时执行）

target_field: &'static str

目标字段名

generator: Box<dyn Fn(&HookContext) -> Value + Sync + Send>

值生成闭包

Implementations

impl AttributeBehavior

pub fn new( name: &'static str, event: HookEvent, target_field: &'static str, generator: impl Fn(&HookContext) -> Value + Send + Sync + 'static, ) -> AttributeBehavior

创建 AttributeBehavior

Trait Implementations

impl Behavior for AttributeBehavior

fn name(&self) -> &'static str

Behavior 名称（用于识别、去重、调试）

fn before_insert( &self, ctx: &HookContext, attrs: &mut HashMap<String, Value>, ) -> Result<(), DbError>

在 insert 前触发（默认空实现）

fn before_update( &self, ctx: &HookContext, attrs: &mut HashMap<String, Value>, ) -> Result<(), DbError>

在 update 前触发（默认空实现）

fn after_find( &self, ctx: &HookContext, attrs: &mut HashMap<String, Value>, ) -> Result<(), DbError>

在 find 后触发（默认空实现，可用于字段后处理）

fn before_delete( &self, _ctx: &HookContext, _attrs: &mut HashMap<String, Value>, ) -> Result<(), DbError>

在 delete 前触发（默认空实现）