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Database

Struct Database 

Source
pub struct Database { /* private fields */ }
Expand description

数据库连接管理器

管理 MySQL 数据库连接池,提供查询构建和执行的入口点

§示例

use yang_db::Database;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    // 连接数据库
    let db = Database::connect("mysql://user:password@localhost:3306/test").await?;
     
    // 使用查询构建器
    let builder = db.table("users")
        .field("id")
        .field("name");
     
    // 执行查询(需要实现 select 方法)
    // let users = builder.select::<User>().await?;
     
    Ok(())
}

Implementations§

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impl Database

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pub async fn connect(url: &str) -> Result<Self, DbError>

创建数据库连接

§参数
  • url: 数据库连接字符串,格式:mysql://user:password@host:port/database
§返回
  • Ok(Database): 成功创建的数据库实例
  • Err(DbError): 连接失败错误
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pub async fn connect_with_config( url: &str, config: DatabaseConfig, ) -> Result<Self, DbError>

使用自定义配置创建数据库连接

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pub fn table(&self, table_name: &str) -> QueryBuilder<'_>

选择表,返回查询构建器

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pub async fn query<T>(&self, sql: &str) -> Result<Vec<T>, DbError>
where T: for<'r> FromRow<'r, MySqlRow> + Send + Unpin,

执行原生 SELECT 查询

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pub async fn execute(&self, sql: &str) -> Result<u64, DbError>

执行原生 INSERT/UPDATE/DELETE 查询

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pub async fn transaction(&self) -> Result<Transaction, DbError>

开始事务

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pub async fn init(&self, sql_script: &str) -> Result<(), DbError>

初始化数据库(执行 SQL 脚本)

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pub async fn create_table(&self, create_sql: &str) -> Result<(), DbError>

创建表

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pub async fn drop_table(&self, table_name: &str) -> Result<(), DbError>

删除表

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pub async fn table_exists(&self, table_name: &str) -> Result<bool, DbError>

检查表是否存在

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