1.0.26 • Published 2 years ago

laf-db-query-wrapper v1.0.26

Weekly downloads
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License
Apache License 2....
Repository
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Last release
2 years ago

简介

laf-client-sdk / database-ql 数据库操作语法包装, 借鉴 MyBatis-Plus 的链式查询语法, 优化单表 CRUD 操作, 避免频繁的判断响应状态, 构建 where 参数; 同时提供完整 model 类型提示;

开始

安装

npm install laf-db-query-wrapper -S

配置

在项目目录下任意位置:

import {LafWrapperConfig} from 'laf-db-query-wrapper'
// 你的 laf-client-sdk cloud 对象
import {cloud} from '@/config/LafClientSdkConfig'

// 最小配置
LafWrapperConfig.cloud = () => cloud
// 自定义日志实现
LafWrapperConfig.LoggerFactory = myLoggerFactory
// 设置日志等级, LoggerLevel.ALL 是默认值
LafWrapperConfig.LoggerFactory.enableLevel = LoggerLevel.ALL

使用

单表, 单记录(文档) 增删改查操作: LafClient

import {LafClient} from 'laf-db-query-wrapper'

export class AccountService {
    private readonly client = new LafClient<Account>(Account.TABLE_NAME)

    private async test() {
        // 新增
        const id: string | number = await this.client.insert({})
        // 查
        const account: Account | null = await this.client.selectById('<ID>')
        // 更新
        const updateOk: boolean = await this.client.updateById('<ID>', {}, '_id')
        // 删除
        const deleteOk: boolean = await this.client.deleteById('<ID>')

    }
}

分页查询, 列表查询, 计数, 等复杂查询: QueryChainWrapperUpdateChainWrapper

详细的操作见类型提示和方法文档注释

import {QueryChainWrapper} from 'laf-db-query-wrapper'
import {UpdateChainWrapper} from 'laf-db-query-wrapper'

// 直接 new 然后使用链式操作
new QueryChainWrapper('<TableName>')
new UpdateChainWrapper('<TableName>')

// 或者使用上例中的 `LafClient` 本质上就是在方法内 new 对象, 只是复用了 LafClient 的 tableName
this.client.queryWrapper()
this.client.updateWrapper()
/* 数据库表模型定义  */
class Account {
    public static readonly TABLE_NAME: string = 'sys_account'
    id: number
    name: string
    password: string
    level: number
    avatarId: number
}
class Resource {
    public static readonly TABLE_NAME = 'sys_resource'
    id: number
    path: string
    type: 1 | 2 | 3
    createTime: number
}

// 分页查询
new QueryChainWrapper<Account>(Account.TABLE_NAME)
    .eq('name', '')
    .neq('level', 123)
    .page(new Page<Account>(1, 20))
    .then((page: Page<Account>) => {
        page.list.forEach(i => {

        })
    })

// 关联查询
const withResource = new QueryChainWrapper<Resource>(Resource.TABLE_NAME)
    .eq('type', 1)
    .show('path')
    .orderByDesc('createTime')
    .getWithArg<Account>('id', 'avatarId', 'avatar')

new QueryChainWrapper<Account>(Account.TABLE_NAME)
    .withOne(withResource)
    .list(1000)
    .then(list => {
        console.debug(list)
    })

仓库地址

https://gitee.com/song-yan-ru-mo_admin/laf-db-query-wrapper

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