Trait ModelExt 

pub trait ModelExt: Model {
    // Required methods
    fn columns() -> Vec<&'static str>;
    fn fillable() -> Vec<&'static str>;

    // Provided methods
    fn guarded() -> Vec<&'static str> { ... }
    fn hidden() -> Vec<&'static str> { ... }
    fn visible() -> Vec<&'static str> { ... }
    fn casts() -> HashMap<&'static str, &'static str> { ... }
    fn dates() -> Vec<&'static str> { ... }
    fn date_format(_field: &str) -> Option<&'static str> { ... }
    fn relations() -> HashMap<&'static str, Relation> { ... }
    fn to_value(&self) -> HashMap<String, Value> { ... }
    fn get_column_value(&self, _column: &str) -> Option<Value> { ... }
    fn from_value(&mut self, _map: HashMap<String, Value>) { ... }
    fn fill(&mut self, map: HashMap<String, Value>) { ... }
    fn to_json(&self) -> Value { ... }
}

模型扩展 trait，提供额外功能

Required Methods

fn columns() -> Vec<&'static str>

获取 SELECT 时使用的所有列

fn fillable() -> Vec<&'static str>

获取可批量赋值的列（INSERT/UPDATE）

Provided Methods

fn guarded() -> Vec<&'static str>

获取受保护列（不可批量赋值）

fn hidden() -> Vec<&'static str>

获取隐藏列（不参与序列化）

fn visible() -> Vec<&'static str>

获取可见列（参与序列化）

fn casts() -> HashMap<&'static str, &'static str>

获取类型转换映射（列名 -> 类型字符串）

fn dates() -> Vec<&'static str>

获取日期列

fn date_format(_field: &str) -> Option<&'static str>

获取指定字段的日期格式

fn relations() -> HashMap<&'static str, Relation>

获取关系映射

fn to_value(&self) -> HashMap<String, Value>

将模型转换为值映射

fn get_column_value(&self, _column: &str) -> Option<Value>

获取指定列的值（须由实现重写）

fn from_value(&mut self, _map: HashMap<String, Value>)

从值映射还原模型（须由实现重写）

fn fill(&mut self, map: HashMap<String, Value>)

批量赋值：只填充 fillable 字段（过滤掉 guarded 字段）

fn to_json(&self) -> Value

序列化为 JSON

Dyn Compatibility

This trait is not dyn compatible.

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

Implementors