Struct Row 

pub struct Row {
    pub table: Option<String>,
    pub primary_keys: Vec<String>,
    pub data: HashMap<String, Value>,
    pub changes: HashSet<String>,
}

Row：携带表名、主键名、数据和变更追踪

Fields

table: Option<String>

表名

primary_keys: Vec<String>

主键字段名列表（默认 ["id"]）

data: HashMap<String, Value>

数据字段

changes: HashSet<String>

变更追踪：记录哪些字段被修改过

Implementations

impl Row

pub fn table(name: impl Into<String>) -> Self

创建指定表的 Row

let user = Row::table("user");

pub fn primary_key(self, key: impl Into<String>) -> Self

设置主键字段

Row::table("user").primary_key("uid")

pub fn primary_keys(self, keys: &[&str]) -> Self

设置复合主键

示例

Row::table("order_item").primary_keys(&["order_id", "item_id"])

pub fn id<V: Into<Value>>(self, id: V) -> Self

快捷设置主键值（取 primary_keys[0]）

Row::table("user").id(123)

pub fn set<V: Into<Value>>(&mut self, key: &str, value: V) -> &mut Self

设置字段值

row.set("name", "Alice")
    .set("age", 25);

pub fn get(&self, key: &str) -> Option<&Value>

获取字段值（serde_json::Value），不存在返回 None

pub fn get_as<'a, T: Deserialize<'a>>(&'a self, key: &str) -> Option<T>

获取字段值并反序列化

let name: String = row.get_as("name").unwrap();

pub fn get_id(&self) -> Option<&Value>

获取主键值（取 primary_keys[0] 对应的字段值）

pub fn mark_all_changed(&mut self)

标记所有字段为已修改

pub fn has(&self, key: &str) -> bool

判断某个字段是否存在（含值为 null）

pub fn to_json(&self) -> Result<String>

转为 JSON 字符串（含 table 和 data）

pub fn from_json(json: &str) -> Result<Self>

从 JSON 字符串反序列化

pub fn detect_id_kind(&self) -> Option<IdKind>

自动检测主键值的 IdKind（UUID / i64 / 字符串等）

Trait Implementations

impl Clone for Row

fn clone(&self) -> Row

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Row

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

Formats the value using the given formatter.

impl Default for Row

fn default() -> Row

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Row

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for Row

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.