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