module.exports = { // 数据库名称 dbName: 'salary', // 数据库地址 dbPath: '_downloads/salary.db', // 注册表 regTable: 'regUser', // 判断数据库是否打开 isOpen() { var open = plus.sqlite.isOpenDatabase({ name: this.dbName, path: this.dbPath }) return open; }, // 打开数据库,没有则创建 openSqlite() { return new Promise((resolve, reject) => { plus.sqlite.openDatabase({ name: this.dbName, path: this.dbPath, success(e) { resolve(e); }, fail(e) { reject(e); } }) }) }, // 关闭数据库 closeSqlite() { return new Promise((resolve, reject) => { plus.sqlite.closeDatabase({ name: this.dbName, success(e) { resolve(e); }, fail(e) { reject(e); } }) }) }, /** * F sql:'CREATE TABLE IF NOT EXISTS dbTable("id" varchar(50),"name" TEXT) * 创建 CREATE TABLE IF NOT EXISTS 、 dbTable 是表名,不能用数字开头、括号里是表格的表头 * @param {Object} dbTable 表名 * @param {Object} data 表列 * @example 创建表 DB.createTable(表名, 表的列) * let sql = '"date" DATE PRIMARY KEY,"money" INTEGER,"notes" text,"info" text'; * await DB.createTable('records', sql); */ createTable(dbTable, data) { return new Promise((resolve, reject) => { // executeSql: 执行增删改等操作的SQL语句 plus.sqlite.executeSql({ name: this.dbName, sql: `CREATE TABLE IF NOT EXISTS ${dbTable}(${data})`, success(e) { resolve(e); }, fail(e) { reject(e); } }) }) }, /** * 数据库删表 * @param {Object} dbTable 表名 * @description 数据库删表 sql:'DROP TABLE dbTable' */ dropTable(dbTable) { return new Promise((resolve, reject) => { plus.sqlite.executeSql({ name: this.dbName, sql: `DROP TABLE ${dbTable}`, success(e) { resolve(e); }, fail(e) { reject(e); } }) }) }, // 向表格里添加数据 sql:'INSERT INTO dbTable VALUES('x','x','x')' 对应新增 // 或者 sql:'INSERT INTO dbTable ('x','x','x') VALUES('x','x','x')' 具体新增 /** * 向表格里添加数据 * @param {String} dbTable 表名 * @param {String} data 列值 * @param {String} condition 表头列名 * @example * let sql = `'${item.money}','${item.notes}','${item.time}'`; * let condition = "'money','notes','time'"; * await DB.insertTableData("records", sql, condition); */ insertTableData(dbTable, data, condition) { // 判断有没有传参 if (dbTable !== undefined && data !== undefined) { // 判断传的参是否有值 var bol = (JSON.stringify(data) == "{}"); if (!bol) { if (condition == undefined) { var sql = `INSERT INTO ${dbTable} VALUES('${data}')`; } else { var sql = `INSERT INTO ${dbTable} (${condition}) VALUES(${data})`; } // console.log(sql); return new Promise((resolve, reject) => { // 表格添加数据 plus.sqlite.executeSql({ name: this.dbName, sql: sql, success(e) { resolve(e); }, fail(e) { reject(e); } }) }) } else { return new Promise((resolve, reject) => { reject("错误添加") }) } } else { return new Promise((resolve, reject) => { reject("错误添加") }) } }, /** * 根据条件向表格里添加数据 有数据更新、无数据插入 * (建表时需要设置主键) 例如 --- "roomid" varchar(50) PRIMARY KEY * @param {String} dbTable 表名 * @param {String} data 列值 * @param {String} condition 表头列名 * @example * let sql = `'${item.money}','${item.notes}','${item.time}'`; * let condition = "'money','notes','time'"; * await DB.insertTableData("records", sql, condition); */ insertOrReplaceData(dbTable, data, condition) { // 判断有没有传参 if (dbTable !== undefined && data !== undefined) { if (condition == undefined) { var sql = `INSERT OR REPLACE INTO ${dbTable} VALUES('${data}')`; } else { var sql = `INSERT OR REPLACE INTO ${dbTable} (${condition}) VALUES(${data})`; } // console.log(sql); return new Promise((resolve, reject) => { // 表格添加数据 plus.sqlite.executeSql({ name: this.dbName, sql: sql, success(e) { resolve(e); }, fail(e) { reject(e); } }) }) } else { return new Promise((resolve, reject) => { reject("错误添加") }) } }, /** * 查询获取数据库里的数据 sql:'SELECT * FROM dbTable WHERE lname = 'lvalue'' * @param {String} dbTable 表名 * @param {String} [condition = ''] 查找条件 * @example * const searchCondition = `WHERE date = '${day}'` * await DB.selectTableData('表名', searchCondition); */ selectTableData(dbTable, condition = '') { if (dbTable !== undefined) { var sql = `SELECT * FROM ${dbTable} ${condition}`; return new Promise((resolve, reject) => { // 表格查询数据 执行查询的SQL语句 plus.sqlite.selectSql({ name: this.dbName, sql: sql, success(e) { resolve(e); }, fail(e) { reject(e); } }) }) } else { return new Promise((resolve, reject) => { reject("错误查询") }); } }, /** * 删除表里的数据 sql:'DELETE FROM dbTable WHERE lname = 'lvalue'' * @param {String} dbTable 表名 * @param {String} [condition = ''] 查找条件 * @example * const searchCondition = `WHERE date = '${day}'` * await DB.deleteTableData('表名', searchCondition); */ deleteTableData(dbTable, condition = '') { if (dbTable !== undefined) { var sql = `DELETE FROM ${dbTable} ${condition}`; 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((resolve, 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, data, lname, lvalue) { if (lname == undefined) { var sql = `UPDATE ${dbTable} SET ${data}`; } else { var 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, id, num) { 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); } }) }) } }