Struct FieldDef 

pub struct FieldDef {
    pub field_type: String,
    pub required: bool,
    pub default: Option<Value>,
    pub read: Option<Vec<String>>,
    pub write: Option<Vec<String>>,
    pub fields: Option<Value>,
    pub strategy: Option<String>,
}

Fields

field_type: String

required: bool

default: Option<Value>

read: Option<Vec<String>>

write: Option<Vec<String>>

fields: Option<Value>

嵌套 object 字段的原始定义（未规范化，与 JS 保持一致）

strategy: Option<String>

ID 供给策略（阶段2）：仅 _id 字段有意义 —— "autoincrement" = 数据库自增列 赋值（SQL 后端），宿主不生成、core 不注入 _id；Mongo 后端无自增语义， 执行器对此显式报错（AUTOINCREMENT_NOT_SUPPORTED）。其余值非法（注册期校验）。

Trait Implementations

impl Clone for FieldDef

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FieldDef

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

Formats the value using the given formatter.