export default { dbName: 'shuto', // 数据库名称 dbPath: '_doc/shuto.db', // 数据库地址,推荐以下划线为开头 // 判断数据库是否打开 isOpen() { // 数据库打开了就返回 true,否则返回 false return plus.sqlite.isOpenDatabase({ name: this.dbName, // 数据库名称 path: this.dbPath // 数据库地址 }); }, // 创建数据库 或 有该数据库就打开 open() { return new Promise((resolve, reject) => { // 打开数据库 plus.sqlite.openDatabase({ name: this.dbName, path: this.dbPath, success: (e) => { console.log(`${this.dbPath} 已打开`); resolve(e); // 成功回调 }, fail(e) { console.error(`打开数据库错误:${e}`); reject(e); // 失败回调 } }) }) }, // 关闭数据库 close() { return new Promise((resolve, reject) => { plus.sqlite.closeDatabase({ name: this.dbName, success(e) { resolve(e); }, fail(e) { reject(e); } }) }) }, // 数据库建表 sql:'CREATE TABLE IF NOT EXISTS dbTable("id" varchar(50),"name" TEXT) // 创建 CREATE TABLE IF NOT EXISTS 、 表名不能用数字开头 createTable(dbTable : string) { return new Promise((resolve, reject) => { plus.sqlite.executeSql({ name: this.dbName, sql: [`CREATE TABLE IF NOT EXISTS ${dbTable}`], success(e) { resolve(e); }, fail(e) { reject(e); } }) }) }, // 数据库删表 sql:'DROP TABLE dbTable' dropTable(dbTable : string) { return new Promise((resolve, reject) => { plus.sqlite.executeSql({ name: this.dbName, sql: [`DROP TABLE ${dbTable}`], success(e) { resolve(e); }, fail(e) { reject(e); } }) }) }, // 向表格里添加数据 sql:'INSERT INTO dbTable VALUES('x','x','x')' 对应新增 // 或者 sql:'INSERT INTO dbTable ('x','x','x') VALUES('x','x','x')' 具体新增 // 插入 INSERT INTO 、 dbTable 是表名、根据表头列名插入列值 insertTableData(dbTable : string, data : any) { // 判断有没有传参 if (dbTable !== undefined && data !== undefined) { // 判断传的参是否有值 let bol = (JSON.stringify(data) == "{}"); if (!bol) { let properties:string = '', values: string = ''; Object.keys(data).forEach(key => { properties += `${key},`; let v = data[key]; if (typeof v == 'string') { values += `'${data[key]}',`; } else { values += `${data[key]},`; } }); const plen = properties.length; const vlen = values.length; if (plen <= 0 || vlen <= 0) { return Promise.reject(`数据有误:${properties} -- ${values}`); } properties = properties.substring(0, plen-1); values = values.substring(0, vlen-1); let sql = `INSERT INTO ${dbTable} (${properties}) VALUES(${values})`; console.log(sql); return new Promise((resolve, reject) => { plus.sqlite.executeSql({ name: this.dbName, sql: [sql], success(e) { resolve(e); }, fail(e) { reject(e); } }) }) } else { return new Promise((reject) => { reject("错误添加") }) } } else { return new Promise((reject) => { reject("错误添加") }) } }, // 根据条件向表格里添加数据 有数据更新、无数据插入 // (建表时需要设置主键) 例如 --- "roomid" varchar(50) PRIMARY KEY insertOrReplaceData(dbTable : string, data : any, condition : any) { // 判断有没有传参 if (dbTable !== undefined && data !== undefined) { let sql: string; if (condition == undefined) { sql = `INSERT OR REPLACE INTO ${dbTable} VALUES('${data}')`; } else { sql = `INSERT OR REPLACE INTO ${dbTable} (${condition}) VALUES(${data})`; } // console.log(sql); return new Promise((resolve, reject) => { // 表格添加数据 plus.sqlite.executeSql({ name: this.dbName, sql: [sql], success(e) { resolve(e); }, fail(e) { reject(e); } }) }) } else { return new Promise((reject) => { reject("错误添加") }) } }, // 查询获取数据库里的数据 sql:'SELECT * FROM dbTable WHERE lname = 'lvalue'' // 查询 SELECT * FROM 、 dbTable 是表名、 WHERE 查找条件 lname,lvalue 是查询条件的列名和列值 selectTableData(dbTable : string, uname : string, namevalue : any, upass : string, passvalue : any, urrn : string, rrnvalue : any) { if (dbTable !== undefined) { let sql: string; // 第一个是表单名称,后两个参数是列表名,用来检索 if (uname !== undefined && upass !== undefined && urrn !== undefined) { // 三个检索条件 sql = `SELECT * FROM ${dbTable} WHERE ${uname} = '${namevalue}' AND ${upass} = '${passvalue}' AND ${urrn}='${rrnvalue}'`; } if (uname !== undefined && upass !== undefined && urrn == undefined) { // 两个检索条件 sql = `SELECT * FROM ${dbTable} WHERE ${uname} = '${namevalue}' AND ${upass} = '${passvalue}'`; } if (uname !== undefined && upass == undefined && urrn == undefined) { // 一个检索条件 sql = `SELECT * FROM ${dbTable} WHERE ${uname} = '${namevalue}'`; // console.log(sql); } if (uname == undefined) { sql = `SELECT * FROM ${dbTable}`; } return new Promise((resolve, reject) => { // 表格查询数据 执行查询的SQL语句 plus.sqlite.selectSql({ name: this.dbName, sql: sql, success(e) { resolve(e); }, fail(e) { reject(e); } }) }) } else { return new Promise((reject) => { reject("错误查询") }); } }, // 删除表里的数据 sql:'DELETE FROM dbTable WHERE lname = 'lvalue'' // 删除 DELETE FROM 、 dbTable 是表名、 WHERE 查找条件 lname,lvalue 是查询条件的列名和列值 deleteTableData(dbTable : string, lname : string, lvalue : any, ww? : string, ee? : any) { if (dbTable !== undefined) { let sql: string; if (lname == undefined) { sql = `DELETE FROM ${dbTable}`; } else { if (ww !== undefined) { // 两个检索条件 sql = `DELETE FROM ${dbTable} WHERE ${lname} = '${lvalue}' AND ${ww} = '${ee}'`; } else { // 一个检索条件 sql = `DELETE FROM ${dbTable} WHERE ${lname} = '${lvalue}'`; } } return new Promise((resolve, reject) => { // 删除表数据 plus.sqlite.executeSql({ name: this.dbName, sql: [sql], success(e) { resolve(e); }, fail(e) { reject(e); } }) }) } else { return new Promise((reject) => { reject("错误删除") }); } }, // 修改数据表里的数据 sql:"UPDATE dbTable SET 列名 = '列值',列名 = '列值' WHERE lname = 'lvalue'" // 修改 UPDATE 、 dbTable 是表名, data: 要修改的列名=修改后列值, lname,lvalue 是查询条件的列名和列值 updateTableData(dbTable : string, data : any, lname : string, lvalue : any) { let sql: string; if (lname == undefined) { sql = `UPDATE ${dbTable} SET ${data}`; } else { sql = `UPDATE ${dbTable} SET ${data} WHERE ${lname} = '${lvalue}'`; } // WHERE 前面是要修改的列名、列值,后面是条件的列名、列值 return new Promise((resolve, reject) => { // 修改表数据 plus.sqlite.executeSql({ name: this.dbName, sql: [sql], success(e) { resolve(e); }, fail(e) { reject(e); } }) }) }, // 获取指定数据条数 sql:"SELECT * FROM dbTable ORDER BY 'id' DESC LIMIT 15 OFFSET 'num'" // dbTable 表名, ORDER BY 代表排序默认正序, id 是排序的条件 DESC 代表倒序,从最后一条数据开始拿 // LIMIT 15 OFFSET '${num}',这句的意思是跳过 num 条拿 15 条数据, num 为跳过多少条数据是动态值 // 例 初始num设为0,就从最后的数据开始拿15条,下次不拿刚获取的数据,所以可以让num为15,这样就能一步一步的拿完所有的数据 pullSQL(dbTable : string, id : any, num : number) { return new Promise((resolve, reject) => { plus.sqlite.selectSql({ name: this.dbName, sql: `SELECT * FROM ${dbTable} ORDER BY '${id}' DESC LIMIT 15 OFFSET '${num}'`, success(e) { resolve(e); }, fail(e) { reject(e); } }) }) }, select(sql: string): Promise { return new Promise((resolve, reject) => { plus.sqlite.selectSql({ name: this.dbName, sql: sql, success(data: any) { console.log(`${sql} 执行成功`); resolve(data); }, fail(e) { console.log(`${sql} 执行失败,${JSON.stringify(e)}`); reject(e); } }) }); }, selectPage(sql: string, page: number = 1, size: number = 10): Promise { const _page = page < 1 ? 0 : page - 1; return this.select(`${sql} limit ${size} offset ${_page*size}`); } }