/**
|
* 对 SQLite 的 ORM 的封装处理
|
* @time 2021-12-30 11:00:00
|
* @version 2.0.0
|
*
|
* @by onemue
|
*/
|
|
let config = {
|
deBug: true,
|
isConnect: false
|
}
|
class Response {
|
constructor(code, msg, data) {
|
this.code = code;
|
this.msg = msg;
|
this.data = data;
|
}
|
toString() {
|
return JSON.stringify(this);
|
}
|
}
|
|
class Utils {
|
static modelSql(name, options) {
|
let sql;
|
let sqlArr = [];
|
let primaryKeyArr = [];
|
//Utils.log('options:' + options);
|
for (const key in options) {
|
if (Object.hasOwnProperty.call(options, key)) {
|
const option = options[key];
|
sqlArr.push(Utils.restrain(key, option));
|
if (option.primaryKey == true) {
|
primaryKeyArr.push(key.toString());
|
//Utils.log(`${key} is primary key${primaryKeyArr.length}`);
|
}
|
}
|
}
|
|
//Utils.log(primaryKeyArr.length);
|
if (primaryKeyArr.length>1) {
|
|
sql = `CREATE TABLE '${name}' (${sqlArr.join(', ').replaceAll(' PRIMARY KEY','')}, PRIMARY KEY (${primaryKeyArr.join()}))`;
|
}
|
else{
|
sql = `CREATE TABLE '${name}' (${sqlArr.join(', ')})`;
|
}
|
//Utils.log(`modelSql :${sql}`);
|
return sql;
|
}
|
|
static restrain(key, options) {
|
|
let restrainArray = [];
|
restrainArray.push(`'${key}'`);
|
|
// 如果是 String 拦截处理
|
if (options.constructor != Object) {
|
restrainArray.push(Utils.toType(options));
|
return restrainArray.join(' ');
|
}
|
|
restrainArray.push(Utils.toType(options.type));
|
|
// 主键
|
if (options.primaryKey == true) {
|
if(options.autoIncrement != true){
|
restrainArray.push('PRIMARY KEY');
|
}
|
}
|
|
// 自增
|
if (Utils.isNumber(options.type)&&options.autoIncrement == true) {
|
restrainArray.pop();
|
restrainArray.push('INTEGER');
|
restrainArray.push('PRIMARY KEY');
|
restrainArray.push('AUTOINCREMENT');
|
}
|
|
// 非空
|
if (options.notNull == true) {
|
restrainArray.push('NOT NULL');
|
}
|
|
// 默认值
|
if (options.default) {
|
restrainArray.push(`DEFAULT ${options.default}`);
|
}
|
|
// 是否是不同的值
|
if (options.unique == true) {
|
restrainArray.push('UNIQUE');
|
}
|
|
|
// 检查
|
if (options.check) {
|
restrainArray.push(`CHECK(${THIS_VALUE.check})`);
|
}
|
|
return restrainArray.join(' ');
|
}
|
|
static toType(jsType) {
|
let sqliteType = '';
|
if (Utils.isNumber(jsType)) {
|
sqliteType = 'numeric';
|
} else if (Utils.isDate(jsType)) {
|
sqliteType = 'timestamp';
|
} else {
|
sqliteType = 'varchar';
|
}
|
return sqliteType;
|
}
|
|
static log() {
|
if (config.deBug) {
|
console.log.apply(null, arguments);
|
}
|
}
|
|
static warn() {
|
if (config.deBug) {
|
console.warn.apply(null, arguments);
|
}
|
}
|
|
static error() {
|
console.error.apply(null, arguments);
|
}
|
|
static isArray(value){ return Object.prototype.toString.call(value) === '[object Array]'}
|
static isObject(value){ return Object.prototype.toString.call(value) === '[object Object]'}
|
static isString(value){ return Object.prototype.toString.call(value) === '[object String]'}
|
static isFunction(value){ return (value === Function || Object.prototype.toString.call(value) === '[object Function]')}
|
static isNumber(value){ return (value === Number || Object.prototype.toString.call(value) === '[object Number]')}
|
static isNaN(value){ return (Object.prototype.toString.call(value) === '[object Number]' && isNaN(value))}
|
static isBoolean(value){ return Object.prototype.toString.call(value) === '[object Boolean]'}
|
static isUndefined(value){ return Object.prototype.toString.call(value) === '[object Undefined]'}
|
static isModel(value){ return Object.prototype.toString.call(value) === '[object Model]'}
|
static isDate(value){ return (value === Date||Object.prototype.toString.call(value) === '[object Date]')}
|
}
|
|
|
/**
|
* Model 对象内部public方法全部 return this;
|
*/
|
class Model {
|
/**
|
* @constructor
|
* @param {String} name 数据库表名
|
* @param {} options 数据表列对象
|
* @returns
|
*/
|
constructor(name, options) {
|
let self = this;
|
self.name = name;
|
self.options = options;
|
|
if (config.isConnect) {
|
self.repair();
|
} else {
|
if(!config.name||!config.path){
|
console.error('"config.name" or "config.path" is empty');
|
}
|
usqlite.connect(config);
|
}
|
}
|
|
/**
|
* @description 查询表数据
|
* @param {String|Array} options
|
* - String WHERE 内容
|
* - Array 需要查询的列
|
* @param {Function} callback
|
* @returns
|
*/
|
find(options, callback) {
|
let sql = '';
|
let self = this;
|
self.repair();
|
if(!(Utils.isString(options)||Utils.isArray(options)||Utils.isFunction(options))) {
|
Utils.error('The first parameter of Model.find should be "Array", "String" or "Function" (when there is only one parameter).')
|
}
|
if(!callback&&!(Utils.isFunction(options))) {
|
Utils.error('The second parameter of Model.find should be "Function".')
|
}
|
if (!callback&&Utils.isFunction(options)) {
|
sql = `SELECT * FROM '${this.name}'`; // 查找全部
|
callback = options;
|
} else if (Utils.isArray(options)) {
|
sql = `SELECT ${options.join()} FROM '${this.name}'`; // 查找制定列
|
} else if (Utils.isString(options)) {
|
sql = `SELECT * FROM '${this.name}' WHERE ${options}`; // 制定条件查询
|
}
|
|
//Utils.log(`find: ${sql}`);
|
|
plus.sqlite.selectSql({
|
name: config.name,
|
sql: sql,
|
success(e) {
|
callback(null, e);
|
},
|
fail(e) {
|
callback(e);
|
}
|
});
|
|
return self;
|
}
|
|
/**
|
* @description 分页查询
|
* @param {Object} options : { where:查询条件, number: 当前页数 , count : 每页数量 }
|
* @param {Function} callback :（err,results）=>{}
|
* @return
|
*/
|
limit(options, callback) {
|
let sql = '';
|
let self = this;
|
self.repair();
|
if(!Utils.isObject(options)){
|
Utils.error('The first parameter of Model.limit should be "Object".')
|
}
|
if(!Utils.isFunction(callback)){
|
Utils.error('The second parameter of Model.limit should be "Function".')
|
}
|
|
if (!options.where) {
|
// 不存在 where
|
sql =
|
`SELECT * FROM '${this.name}' LIMIT ${options.count} OFFSET ${(options.number - 1) * options.count}`
|
} else {
|
// 存在 where
|
sql =
|
`SELECT * FROM '${this.name}' WHERE ${options.where} LIMIT ${options.count} OFFSET ${(options.number - 1) * options.count}`;
|
};
|
|
//Utils.log(`limit: ${sql}`);
|
|
plus.sqlite.selectSql({
|
name: config.name,
|
sql: sql,
|
success(e) {
|
callback(null, e);
|
},
|
fail(e) {
|
callback(e);
|
}
|
});
|
return this;
|
}
|
|
/**
|
* @description 插入数据
|
* @param {Object|Array} options: 需要插入的单个或者多个数据
|
* @param {Function} callback :（err,results）=>{}
|
*/
|
insert(options, callback) {
|
let self = this;
|
self.repair();
|
|
if(!(Utils.isObject(options)||Util.isArray(options))){
|
Utils.error('The first parameter of Model.insert should be "Object" or "Array".')
|
}
|
if(!Utils.isFunction(callback)){
|
Utils.error('The second parameter of Model.insert should be "Function".')
|
}
|
|
if (config.isConnect) {
|
if (Utils.isArray(options)) {
|
for (var i = 0; i < options.length; i++) {
|
this.insert(options[i], callback, i);
|
}
|
} else if (Utils.isObject(options)) {
|
let keys = [];
|
let values = [];
|
let index = arguments[3]??null;
|
for (var key in options) {
|
keys.push(key);
|
values.push(`'${options[key]}'`);
|
}
|
|
let sql = `INSERT INTO '${this.name}' (${keys.join()}) VALUES (${values.join()})`;
|
|
//Utils.log(`insert: ${sql}`);
|
plus.sqlite.executeSql({
|
name: config.name,
|
sql: sql,
|
success(e) {
|
if(index){
|
callback(null, e, options, index);
|
}
|
callback(null, e, options);
|
},
|
fail(e) {
|
if(index){
|
callback(e, null, options, index);
|
}
|
callback(e, null, options);
|
}
|
})
|
}
|
}
|
return this;
|
}
|
|
/**
|
* @description 更新数据
|
* @param {String} options：可选参数 更新条件
|
* @param {Object} obj： 修改后的数据
|
* @param {Function} callback :（err,results）=>{}
|
*/
|
update(options, obj, callback) {
|
let sql = '';
|
let self = this;
|
let items = [];
|
self.repair();
|
|
if(!(Utils.isObject(options)||Utils.isString(options))){
|
Utils.error('The first parameter of Model.update should be "Object" or "String".')
|
}
|
if(!(Utils.isObject(obj)||Utils.isFunction(obj))){
|
Utils.error('The second parameter of Model.update should be "Objrct" or "Function".')
|
}
|
|
if (!callback) {
|
// 不存在options
|
callback = obj;
|
obj = options;
|
|
for (var key in obj) {
|
items.push(`${key}='${obj[key]}'`);
|
};
|
sql = `UPDATE '${this.name}' SET ${items.join()}`;
|
} else {
|
// 存在options
|
for (var key in obj) {
|
items.push(`${key}='${obj[key]}'`);
|
};
|
sql = `UPDATE ${this.name} SET ${items.join()} WHERE ${options}`;
|
};
|
//Utils.log(`update: ${sql}`);
|
plus.sqlite.executeSql({
|
name: config.name,
|
sql: sql,
|
success(e) {
|
callback(null, e);
|
},
|
fail(e) {
|
callback(e);
|
}
|
});
|
|
return this;
|
}
|
|
/**
|
* @description 删除数据
|
* @param {String} options ：可选参数 删除条件
|
* @param {Function} callback :（err,results）=>{}
|
*/
|
delete(options, callback) {
|
var sql = '';
|
let self = this;
|
self.repair();
|
|
if(!(Utils.isString(options)||Utils.isFunction(options))){
|
Utils.error('The first parameter of Model.delete should be "Object" or "Function".')
|
}
|
if(callback&&!Utils.isFunction(callback)){
|
Utils.error('The second parameter of Model.delete should be "Function".')
|
}
|
|
if (!callback) {
|
sql = `DELETE FROM '${this.name}'`;
|
callback = options;
|
} else {
|
sql = `DELETE FROM '${this.name}' WHERE ${options}`;
|
};
|
//Utils.log(`delete: ${sql}`);
|
plus.sqlite.executeSql({
|
name: config.name,
|
sql: sql,
|
success(e) {
|
callback(null, e);
|
},
|
fail(e) {
|
callback(e);
|
}
|
});
|
|
return this;
|
}
|
|
|
/**
|
* @description 重命名或者新增列
|
* @param {Object|Array|String} options 参数 数组为新增多列 对象为新增单列{aa} 字符串重命名
|
* @param {Function} callback :（err,results）=>{}
|
* @return:
|
*/
|
alter(options, callback) {
|
let self = this;
|
let sql = '';
|
self.repair();
|
if(!(Utils.isObject(options)||Utils.isArray(options)||Utils.isString(options))){
|
Utils.error('The first parameter of Model.alter should be "Object", "Array" or "String".')
|
}
|
if(!Utils.isFunction(callback)){
|
Utils.error('The second parameter of Model.alter should be "Function".')
|
}
|
|
if (Utils.isArray(options)) { // 新增多列
|
for (let i = 0; i < options.length; i++) {
|
self.alter(options[i], callback);
|
}
|
} else if (Utils.isObject(options)) { // 新增单列
|
let column = Utils.restrain(options.name, options.option);
|
sql = `ALTER TABLE '${this.name}' ADD COLUMN ${column}`
|
} else if (options.constructor == String) { // 重命名
|
sql = `ALTER TABLE '${self.name}' RENAME TO '${options}'`
|
}
|
//Utils.log(`alter: ${sql}`);
|
plus.sqlite.selectSql({
|
name: config.name,
|
sql: sql,
|
success(e) {
|
if (options.constructor == String) { // 重命名
|
self.name = options;
|
}
|
callback(null, e);
|
},
|
fail(e) {
|
callback(e);
|
}
|
});
|
return this;
|
}
|
/**
|
* @description
|
* @param {Model} model 右 Model
|
* @param {Object} options
|
* @param {Function} callback
|
* @returns
|
*/
|
join(model, options, callback) {
|
if (!model) {
|
Utils.error('"model" cannot be empty.');
|
}
|
if (!Utils.isObject(options)) {
|
Utils.error('The type of "options" is wrong, it should be "Object".');
|
}
|
if (!options.type || !options.predicate) {
|
Utils.error('Missing required parameters');
|
}
|
|
let leftName = this.name;
|
let rightName = model.name;
|
let leftValue = options.predicate.left;
|
let rightValue = options.predicate.right;
|
let cols = ['*'];
|
self.repair();
|
|
const SQL_MAP = {
|
cross: `SELECT ${cols.join()} FROM ${leftName} CROSS JOIN ${rightName};`,
|
inner: [`SELECT ${cols.join()} FROM ${leftName} NATURAL JOIN ${rightName}`,
|
`SELECT ${cols.join()} FROM ${leftName} INNER JOIN ${rightName} ON ${leftName}.${leftValue} = ${rightName}.${rightValue}`
|
],
|
outer: `SELECT ${cols.join()} FROM ${leftName} OUTER JOIN ${rightName} ON ${leftName}.${leftValue} = ${rightName}.${rightValue}`
|
}
|
|
let sql = '';
|
if (options.type == inner && !options.predicate) {
|
sql = SQL_MAP[options.type][0];
|
} else if (options.type == inner && !options.predicate) {
|
sql = SQL_MAP[options.type][1];
|
} else {
|
sql = SQL_MAP[options.type];
|
}
|
|
//Utils.log(`join: ${sql}`);
|
plus.sqlite.selectSql({
|
name: config.name,
|
sql: sql,
|
success(e) {
|
callback(null, e);
|
},
|
fail(e) {
|
callback(e);
|
}
|
});
|
return this;
|
}
|
|
/**
|
* @description 执行sql语句
|
* @param {String} sql : sql语句
|
* @param {Function} callback :（err,results）=>{}
|
*/
|
sql(sql, callback) {
|
if (!Utils.isString(sql)) {
|
Utils.error('"The type of "sql" is wrong, it should be "String".');
|
}
|
if (callback&&!Utils.isFunction(callback)) {
|
Utils.error('The type of "callback" is wrong, it should be "Function".');
|
}
|
|
let self = this;
|
self.repair();
|
|
//Utils.log(`sql: ${sql}`);
|
plus.sqlite.selectSql({
|
name: config.name,
|
sql: sql,
|
success(e) {
|
callback(null, e);
|
},
|
fail(e) {
|
callback(e);
|
}
|
});
|
return this;
|
}
|
|
/**
|
* @description 判断是否存在
|
* @param {Function} callback
|
*/
|
isExist(callback) {
|
if (callback&&!Utils.isFunction(callback)) {
|
Utils.error('The type of "callback" is wrong, it should be "Function".');
|
}
|
|
let sql = `SELECT count(*) AS isExist FROM sqlite_master WHERE type='table' AND name='${this.name}'`;
|
let self = this;
|
//Utils.log(`isExist: ${sql}`);
|
//Utils.log(`isExist: ${config.name}`);
|
plus.sqlite.selectSql({
|
name: config.name,
|
sql: sql,
|
success(e) {
|
callback(null, e);
|
},
|
fail(e) {
|
callback(e);
|
}
|
});
|
return this;
|
}
|
/**
|
* @description 删除数据表 **不推荐**
|
* @param {Function} callback
|
*/
|
drop(callback) {
|
if (callback&&!Utils.isFunction(callback)) {
|
Utils.error('The type of "callback" is wrong, it should be "Function".');
|
}
|
|
var sql = `DROP TABLE '${this.name}'`;
|
let self = this;
|
self.repair();
|
|
//Utils.log(`drop: ${sql}`);
|
plus.sqlite.selectSql({
|
name: config.name,
|
sql: sql,
|
success(e) {
|
callback(null, e);
|
},
|
fail(e) {
|
callback(e);
|
}
|
});
|
return this;
|
}
|
|
/**
|
* @description 创建数据表 **不推荐**
|
* @param {Function} callback
|
*/
|
create(callback) {
|
if (callback&&!Utils.isFunction(callback)) {
|
Utils.error('The type of "callback" is wrong, it should be "Function".');
|
}
|
|
let self = this;
|
let sql = Utils.modelSql(self.name, self.options);
|
//Utils.log(`create: ${sql}`);
|
plus.sqlite.executeSql({
|
name: config.name,
|
sql: sql,
|
success(e) {
|
callback(null, e);
|
},
|
fail(e) {
|
callback(e)
|
}
|
});
|
return this;
|
}
|
|
toString() {
|
return `[${this.name} Model]`;
|
}
|
|
repair() {
|
let self = this;
|
self.isExist(function (e, r) {
|
if (e) {
|
console.error(e);
|
}
|
|
if (!r[0].isExist) {
|
self.create(function (e, r) {
|
//Utils.log(e, r);
|
});
|
}
|
});
|
}
|
// TODO 更新表结构
|
// TODO 数据表备份??
|
// TODO 多表联查
|
// TODO 下班了其他的想不起来 回头再说
|
}
|
|
|
// 单例模式
|
export class usqlite {
|
/**
|
* 构造函数
|
* @param {Object} options 数据库配置信息 *
|
* {name: 'demo', path: '_doc/demo.db'}
|
* - name 数据库名称*
|
* - path 数据库路径
|
* @param {Function} callback
|
*/
|
constructor(options, callback) {
|
console.warn('No instantiation');
|
}
|
/**
|
* @description 链接数据库
|
* @param {Object} options 数据库配置信息 *
|
* {name: 'demo', path: '_doc/demo.db'}
|
* - name 数据库名称*
|
* - path 数据库路径
|
* @param {Function} callback
|
*/
|
static connect(options, callback) {
|
config.name = options.name; // 数据库名称*
|
config.path = options.path; // 数据库名称*
|
|
plus.sqlite.openDatabase({
|
name: config.name, //数据库名称
|
path: config.path, //数据库地址
|
success(e) {
|
config.isConnect = true;
|
callback(null, e);
|
},
|
fail(e) {
|
if (e.code == -1402) {
|
config.isConnect = true;
|
}
|
callback(e);
|
}
|
});
|
}
|
|
/**
|
* @description 断开数据库
|
* @param {*} callback
|
*/
|
static close(callback) {
|
plus.sqlite.closeDatabase({
|
name: config.name, //数据库名称
|
path: config.path, //数据库地址
|
success(e) {
|
config.isConnect = false;
|
callback(null, e);
|
},
|
fail(e) {
|
callback(e);
|
}
|
});
|
}
|
static closeAsync(options){
|
plus.sqlite.closeDatabase({
|
name: config.name, //数据库名称
|
path: config.path, //数据库地址
|
success(e) {
|
config.isConnect = false;
|
callback(null, e);
|
},
|
fail(e) {
|
callback(e);
|
}
|
});
|
}
|
/**
|
* @description 创建 Model 对象
|
* @example
|
* usqlite.model('demo',
|
* {
|
* id: {
|
* type:Number
|
* },
|
* content: String
|
* })
|
* @param {String} name 数据表名称 *
|
* @param {String} options 参数配置 *
|
* @returns 返回 Model 对象
|
*/
|
static model(name, options) {
|
//Utils.log(config);
|
return new Model(name, options);
|
}
|
}
|
