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koishi-plugin-database-leveldb

v0.1.2

Published

leveldb database service for Koishi

Readme

koishi-plugin-database-leveldb

基于 LevelDB 的 Koishi 数据库服务。

特性

  • 高性能: 基于 LevelDB 键值存储,有较高的读写性能。
  • 轻量级: 无外部数据库依赖,非常适合中小型机器人。
  • 易于使用: 配置简单,即插即用。

说明

数据库文件默认存放于 data/database/leveldb 目录。

使用方法

完整用法请参考 koishi 文档 -> koishi.chat/zh-CN/guide/database

在你的插件中使用

import { Context } from 'koishi'

// 声明你需要用到的数据表结构
declare module 'koishi' {
  interface Tables {
    demo: DemoTable
  }
}

export interface DemoTable {
  userid: string
  // ... 其他字段
}

export const inject = ['database']

export async function apply(ctx: Context) {
  // 为 "demo" 表扩展模型
  ctx.model.extend('demo', {
    userid: 'string', // 用户 ID
    // ... 其他字段
  }, {
    primary: ['userid'], // 设置主键
  })

  ctx.middleware(async (session, next) => {
    let userId = session.userId
    if (!userId) return next()

    // 尝试从数据库中获取用户记录
    let [userRecord] = await ctx.database.get('demo', { userid: userId })

    // 如果记录不存在,则创建一条新记录
    if (!userRecord) {
      userRecord = {
        userid: userId,
        // ... 初始化其他字段
      }
      await ctx.database.create('demo', userRecord)
    }

    // 现在你可以使用 userRecord 对象了
    // ...
    
    return next()
  })
}