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@szgc/h5sql

v1.0.4

Published

根据 plus.sqlite Api 进行包装的数据库操作库

Downloads

11

Readme

H5 数据库操作库

根据 plus.sqlite Api 进行包装的数据库操作库

导出项

sql

将 plus.sqlite 包含的方法全部改写为 Promise 返回

  • 引入方式

    import { sql } from "@szgc/h5sql";
  • 成员方法

    /**
     * 打开数据库连接
     * @description
     *  1、判断数据库是否已经打开,已经打开直接返回结果
     *  2、如果没有打开,尝试调用打开数据库api,如果没有数据库文件会自动创建
     * @returns {Promise<boolean>}
     */
    open(): Promise<SqlOpResult>;
    
    /**
     * 关闭数据库连接
     * @description
     *  1、判断数据库是否关闭,如果已经关闭直接返回结果
     *  2、尝试调用关闭api
     * @returns
     */
    close(): Promise<SqlOpResult>;
    
    /**
     * 执行数据库事务操作
     * @param operation 只能是:"begin" | "commit" | "rollback"
     * @returns
     */
    transaction(operation: "begin" | "commit" | "rollback"): Promise<SqlOpResult>;
    
    /**
     * 执行sql语句
     * @param sql 字符串或字符串数组
     * @returns
     */
    executeSql(sql: string | Array<string>): Promise<SqlOpResult>;
    
    /**
     * 执行sql查询语句
     * @param sql
     * @returns
     */
    selectSql(sql: string): Promise<SqlOpResult>;

Dao

数据库操作基类,其实例自动具有增删改查能力

  • 成员方法

    /**
     * 构造函数
     * @param options
     */
    constructor(
      tableName: string,
      tableColumns: {
        [key in keyof K]: { columnName?: string; type: "TEXT" | "INTEGER" };
      }
    );
    
    /**
     * 创建表
     * @param drop 是否先执行删除表操作
     * @returns
     */
    create(drop?: boolean): Promise<SqlOpResult>;
    
    /**
     * 插入数据
     * @param data
     * @returns
     */
    insert(data: Partial<K>): Promise<SqlOpResult>;
    
    /**
     * 修改数据
     * @param data 要修改的数据项
     * @param where 符合修改数据项的条件
     */
    update(options: {
      data: Partial<K>;
      where?: WhereOf<K>;
    }): Promise<SqlOpResult>;
    
    /**
     * 删除数据
     * @param where
     * @returns
     */
    remove(where?: WhereOf<K>): Promise<SqlOpResult>;
    
    /**
     * 分页查询
     */
    page(options: {
      where?: WhereOf<K>;
      order?: OrderOf<K>;
      pageSize?: number;
      current?: number;
    }): Promise<PageQueryResult<K>>;
    
    /**
     * 列表查询
     */
    list(options: {
      where?: WhereOf<K>;
      order?: OrderOf<K>;
    }): Promise<ListQueryResult<K>>;
    
    /**
     * 单条查询
     */
    single(where?: WhereOf<K>): Promise<SingleQueryResult<K>>;
  • 示例

    import { Dao } from "@szgc/h5sql";
    
    /**
     * 用户对象模型
     */
    interface UserModel {
      userName: string;
      id: string;
      account: string;
      age: number;
    }
    
    /**
     * 创建userDao
     */
    export const userDao = new Dao<UserModel>("USER1", {
      userName: {
        type: "TEXT"
      },
      id: {
        columnName: "USER_ID",
        type: "TEXT"
      },
      account: {
        type: "TEXT"
      },
      age: {
        type: "INTEGER"
      }
    });
    
    // 建表,如果存在则不创建
    await userDao.create();
    
    // 建表,如果存在则先删除原有表,再创建
    await userDao.create(true);
    
    // 插入数据
    await userDao.insert({
      id: "222",
      account: "5",
      age: 13
    });
    
    //  修改数据
    await userDao.update({
      data: {
        account: "李四"
      },
      where: {
        id: "5"
      }
    });
    
    // 删除表中所有数据
    await userDao.remove();
    
    // 删除表中符合条件的数据
    await userDao.remove({
      age: 15,
      userName: "zs"
    });
    
    // 查询表中符合条件的数据并排序
    await userDao.list({
      where: {
        age: {
          value: 10,
          op: ">"
        }
      },
      order: {
        columns: ["account", "id"],
        op: "desc"
      }
    });
    
    // 查询表中符合条件的单条数据
    await userDao.single({
      age: {
        value: 10,
        op: ">"
      }
    });
    
    // 分页查询表中符合条件的数据并排序
    await userDao.page({
      where: {},
      order: {
        columns: [],
        op: "asc"
      },
      pageSize: 3,
      current: 1
    });