Struct Transaction

pub struct Transaction {
    pub meta: HashMap<String, Arc<dyn Any>>,
    pub id: u64,
    pub steps: Vector<Arc<dyn Step>>,
    pub patches: Vector<Vec<Patch>>,
    pub doc: Arc<NodePool>,
    pub draft: Draft,
    pub schema: Arc<Schema>,
}

事务结构体，用于管理文档的修改操作

Fields

meta: HashMap<String, Arc<dyn Any>>

存储元数据的哈希表，支持任意类型数据

id: u64

事务的时间戳

steps: Vector<Arc<dyn Step>>

存储所有操作步骤

patches: Vector<Vec<Patch>>

存储每个步骤对应的补丁列表

doc: Arc<NodePool>

当前文档状态

draft: Draft

文档的草稿状态，用于临时修改

schema: Arc<Schema>

文档的模式定义

Implementations

impl Transaction

pub async fn transaction(&mut self, call_back: Arc<dyn Command>)

执行一个事务操作 call_back: 要执行的命令

pub fn new(state: &State) -> Self

创建新的事务实例 state: 当前状态对象 返回: Transaction 实例

pub fn doc(&self) -> Arc<NodePool>

获取当前文档状态

pub fn as_concrete(step: &Arc<dyn Step>) -> ConcreteStep

将步骤转换为具体步骤

pub fn set_node_attribute( &mut self, id: String, values: HashMap<String, String>, )

设置节点属性 id: 节点ID values: 属性键值对

pub fn add_node(&mut self, parent_id: String, node: Node)

添加新节点 parent_id: 父节点ID node: 要添加的节点

pub fn set_time(&mut self, id: u64) -> &mut Self

设置事务时间戳

pub fn set_meta<K, T: Any>(&mut self, key: K, value: T) -> &mut Self

where K: Into<String>,

设置元数据 key: 键 value: 值（支持任意类型）

pub fn get_meta<T: 'static, K>(&self, key: K) -> Option<&T>

where K: Into<String>,

获取元数据 key: 键 返回: Option<&T>，如果存在且类型匹配则返回Some，否则返回None

Trait Implementations

impl Clone for Transaction

fn clone(&self) -> Transaction

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Transaction

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

Formats the value using the given formatter.

impl Transform for Transaction

fn step(&mut self, step: Arc<dyn Step>) -> Result<(), TransformError>

执行一个修改步骤 step: 要执行的步骤 返回: Result，表示执行成功或失败

fn doc_changed(&self) -> bool

检查文档是否被修改

fn add_step(&mut self, step: Arc<dyn Step>, result: StepResult)

添加一个步骤及其结果到事务中

impl Send for Transaction

impl Sync for Transaction