mirror of
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602 lines
20 KiB
JavaScript
602 lines
20 KiB
JavaScript
/**
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* Model类
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* @type {[type]}
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*/
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var MODEL_INSERT = 1; // 插入模型数据
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var MODEL_UPDATE = 2; // 更新模型数据
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var MODEL_BOTH = 3; // 包含上面两种方式
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var MUST_VALIDATE = 1; // 必须验证
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var EXISTS_VALIDATE = 0; // 表单存在字段则验证
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var VALUE_VALIDATE = 2; // 表单值不为空则验证
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var vm = require("vm");
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var model = module.exports = Class(function(){
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var _linkNum = [];
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var _db = {};
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return {
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initProps: function(){
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// 当前使用的扩展模型
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//this._extModel = null;
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// 当前数据库操作对象
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this.db = null;
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// 主键名称
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this.pk = "id";
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// 数据表前缀
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this.tablePrefix = "";
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// 模型名称
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this.name = "";
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// 数据库名称
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this.dbName = "";
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// 数据库配置
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this.connection = "";
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// 数据表名（不包含表前缀）
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this.tableName = "";
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// 实际数据表名（包含表前缀）
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this.trueTableName = "";
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// 最近错误信息
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this.error = "";
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// 字段信息
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this.fields = {};
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// 数据信息
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this.data = {};
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// 查询表达式参数
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this.options = {};
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// 自动验证定义
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//this._validate = [];
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// 自动完成定义
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//this._auto = [];
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// 字段映射定义
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//this._map = [];
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// 命名范围定义
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//this._scope = [];
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// 是否自动检测数据表字段信息
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this.autoCheckFields = true;
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// 是否批处理验证
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//this.patchValidate = false;
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//初始化的promise
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this.promise = null;
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},
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/**
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* 架构函数
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* 取得DB类的实例对象 字段检查
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* @access public
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* @param string $name 模型名称
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* @param string $tablePrefix 表前缀
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* @param mixed $connection 数据库连接信息
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*/
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init: function(name, tablePrefix, connection){
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this.initProps();
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// 获取模型名称
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if (name) {
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if (name.indexOf('.') > -1) {
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name = name.split(".");
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this.dbName = name[0];
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this.name = name[1];
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}else{
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this.name = name;
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}
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}else if(!this.name){
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this.getModelName();
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}
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// 设置表前缀
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this.tablePrefix = tablePrefix === undefined ? (this.tablePrefix || C('db_prefix')) : tablePrefix;
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// 数据库初始化操作
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// 获取数据库操作对象
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// 当前模型有独立的数据库连接信息
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this.promise = this.initDb(0, connection || this.connection);
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this.initMethod && this.initMethod();
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},
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/**
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* 初始化数据库连接
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* @access public
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* @param integer $linkNum 连接序号
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* @param mixed $config 数据库连接信息
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* @param array $params 模型参数
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* @return Model
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*/
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initDb: function(linkNum, config, params){
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linkNum = linkNum || 0;
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if (!linkNum && this.db) {
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return get_promise(this.db);
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};
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if (!_db[linkNum] || config && _linkNum[linkNum] != config) {
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if (config && is_string(config) && config.indexOf("/") == -1) {
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config = C(config);
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};
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_db[linkNum] = think_require("Db").getInstance(config);
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}else if(config === null){
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_db[linkNum].close();
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delete _db[linkNum];
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return get_promise(this);
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}
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if (params) {
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extend(this, params);
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};
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// 记录连接信息
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_linkNum[linkNum] = config;
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this.db = _db[linkNum];
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if (this.name && this.autoCheckFields) {
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return this.checkTableInfo();
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};
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return get_promise(this);
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},
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/**
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* 获取模型名
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* @access public
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* @return string
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*/
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getModelName: function(){
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var filename = this.__filename || __filename;
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if (!this.name) {
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var name = filename.split("/").pop().replace(C('class_file_suffix'), "");
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this.name = name.substr(0, name.length - 5);
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};
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return this.name;
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},
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/**
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* 获取表名
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* @return {[type]} [description]
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*/
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getTableName: function(){
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if (!this.trueTableName) {
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var tableName = this.tablePrefix || "";
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tableName += this.tableName || parse_name(this.name);
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this.trueTableName = tableName.toLowerCase();
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};
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var tableName = (this.dbName ? this.dbName + "." : "") + this.trueTableName;
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return tableName;
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},
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/**
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* 获取缓存数据表字段信息的缓存文件
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* @return {[type]} [description]
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*/
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getFieldsCacheFile: function(){
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var db = this.dbName || C('db_name');
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return '_fields/' + db + "." + this.name;
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},
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/**
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* 自动检测数据表信息
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* @access protected
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* @return void
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*/
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checkTableInfo: function(){
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// 如果不是Model类 自动记录数据表信息
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// 只在第一次执行记录
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if (is_empty(this.fields)) {
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// 如果数据表字段没有定义则自动获取
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if (C('db_fields_cache')) {
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var fields = F(this.getFieldsCacheFile());
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if (fields) {
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return get_promise(fields);
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};
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};
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// 每次都会读取数据表信息
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return this.flushFields();
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};
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return get_promise(this.fields);
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},
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/**
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* 刷新数据表字段信息
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* @return promise [description]
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*/
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flushFields: function(){
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this.db.setModel(this.name);
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var self = this;
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return this.getTableFields(this.getTableName(), true).then(function(fields){
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self.fields = fields;
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if (C('db_fields_cache')) {
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F(self.getFieldsCacheFile(), self.fields);
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};
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return self.fields;
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})
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},
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/**
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* 获取数据表的字段
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* @param {[type]} table
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* @param {[type]} all
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* @return {[type]}
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*/
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getTableFields: function(table, all){
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if (table === true) {
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table = undefined;
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all = true;
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};
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if (table) {
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return this.db.getFields(table).then(function(data){
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var fields = {
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"_field": Object.keys(data),
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"_autoinc": false
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};
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var types = {};
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for(var key in data){
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var val = data[key];
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types[key] = val.type;
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if (val.primary) {
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fields['_pk'] = key;
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if (val.autoinc) {
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fields['_autoinc'] = true;
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};
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};
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}
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fields['_type'] = types;
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return all ? fields : fields["_field"];
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})
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};
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if (!is_empty(this.fields)) {
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return get_promise(all ? this.fields : this.fields["_field"]);
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};
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return this.getTableFields(this.getTableName(), all);
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},
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/**
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* 获取上一次操作的sql
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* @return {[type]} [description]
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*/
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getLastSql: function(){
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return this.db.getLastSql();
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},
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/**
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* 获取主键名称
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* @access public
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* @return string
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*/
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getPk: function(){
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return this.fields['_pk'] || this.pk;
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},
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/**
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* 缓存
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* @param {[type]} key [description]
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* @param {[type]} expire [description]
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* @param {[type]} type [description]
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* @return {[type]} [description]
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*/
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cache: function(key, expire, type){
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this.options.cache = {
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key: key,
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expire: expire,
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type: type
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};
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return this;
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},
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/**
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* 指定查询数量
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* @param {[type]} offset [description]
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* @param {[type]} length [description]
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* @return {[type]} [description]
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*/
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limit: function(offset, length){
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this.options.limit = length === undefined ? offset : offset + "," + length;
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return this;
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},
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/**
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* 指定分页
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* @return {[type]} [description]
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*/
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page: function(page, listRows){
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this.options.page = listRows === undefined ? page : page + "," + listRows;
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return this;
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},
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/**
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* where条件
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* @return {[type]} [description]
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*/
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where: function(where){
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if (is_string(where) && where) {
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where = {
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"_string": where
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}
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};
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this.options.where = extend(this.options.where || {}, where);
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return this;
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},
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/**
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* 要查询的字段
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* @return {[type]} [description]
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*/
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field: function(field){
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if (!field) {
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field = "*";
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};
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this.options.field = field;
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return this;
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},
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/**
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* 联合查询
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* @return {[type]} [description]
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*/
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union: function(union){
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if (!this.options.union) {
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this.options.union = [];
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};
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this.options.union.push(union);
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return this;
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},
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join: function(join){
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if (is_array(join)) {
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this.options.join = join;
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}else{
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if (!this.options.join) {
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this.options.join = [];
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};
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this.options.join.push(join);
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}
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return this;
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},
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getError: function(){
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return this.error;
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},
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// rollback: function(){
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// return this.db.rollback();
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// },
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// commit: function(){
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// return this.db.commit();
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// },
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// startTrans: function(){
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// this.commit();
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// this.db.startTrans();
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// return this;
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// },
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/**
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* 解析参数
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* @param {[type]} options [description]
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* @return promise [description]
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*/
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parseOptions: function(options){
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options = extend(this.options, options);
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// 查询过后清空sql表达式组装 避免影响下次查询
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this.options = {};
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var promise = null;
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//获取数据表下的字段信息
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if (options.table) {
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promise = this.getTableFields(options.table);
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}else{
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options.table = this.getTableName();
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promise = get_promise(this.fields["_field"]);
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}
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//数据表别名
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if (options.alias) {
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options.table += " " + options.alias;
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};
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options.modal = this.name;
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var self = this;
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return promise.then(function(fields){
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// 字段类型验证
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if (options.where && is_object(options.where) && !is_empty(fields)) {
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// 对数组查询条件进行字段类型检查
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for(var key in options.where){
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var val = options.where[key];
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key = key.trim();
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if (fields.indexOf(key)) {
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if (is_scalar(val)) {
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options.where = self.parseType(options.where, key);
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};
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}else if(key.substr(0, 1) !== "_" && !(/[\.\|\&]/.test(key))){
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delete options.where[key];
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}
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}
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};
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options = self.optionsFilter(options);
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return options;
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});
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},
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/**
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* 选项过滤函数
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* @param {[type]} options [description]
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* @return {[type]} [description]
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*/
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optionsFilter: function(options){
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return options;
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},
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/**
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* 数据类型检测
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* @param {[type]} data [description]
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* @param {[type]} key [description]
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* @return {[type]} [description]
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*/
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parseType: function(data, key){
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var fieldType = this.fields["_type"][key] || "";
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if (fieldType.indexOf("bigint") === -1 && fieldType.indexOf("int") > -1) {
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data[key] = parseInt(data[key], 10) || 0;
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}else if(fieldType.indexOf("double") > -1 || fieldType.indexOf("float") > -1){
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data[key] = parseFloat(data[key]) || 0.0;
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}else if(fieldType.indexOf('bool') > -1){
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data[key] = !! data[key];
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}
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return data;
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},
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/**
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* 添加一条或者多条数据
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* @param {[type]} data [description]
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* @param {[type]} options [description]
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* @param {[type]} replace [description]
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*/
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add: function(data, options, replace){
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data = data || "";
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if (!data) {
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if (this.data) {
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data = this.data;
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this.data = {};
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}else{
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throw_error(L("_DATA_TYPE_INVALID_"));
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return false;
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}
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};
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options = this.parseOptions(options);
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data = this.facade(data);
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},
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/**
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* 删除数据
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* @return {[type]} [description]
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*/
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delete: function(){
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},
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/**
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* 更新数据
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* @return {[type]} [description]
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*/
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update: function(){
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},
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save: function(options){
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return this.update(options);
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},
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/**
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* 查询语句的options
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* @return {[type]} [description]
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*/
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queryOptions: function(options){
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if (is_number(options) || is_string(options)) {
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var pk = this.getPk();
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options = options + "";
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var where = {};
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if (options.indexOf(",") > -1) {
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where[pk] = ["IN", options];
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}else{
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where[pk] = options;
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}
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options = {
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"where": where
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};
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}else if (!is_empty(options)) {
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options = {
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"where": options
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};
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};
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return options || {};
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},
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/**
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* 查询一条数据
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* @return 返回一个promise
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*/
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find: function(options){
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var self = this;
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options = this.queryOptions(options);
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options.limit = 1;
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return this.parseOptions(options).then(function(options){
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return self.db.select(options).then(function(data){
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return data ? data[0] : [];
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})
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});
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},
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/**
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* 查询数据
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* @return 返回一个promise
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*/
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select: function(options){
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var self = this;
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if (options === false) {
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return this.parseOptions({}).then(function(options){
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return '( ' + self.db.buildSelectSql(options) + " )";
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});
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};
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options = this.queryOptions(options);
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return this.parseOptions(options).then(function(options){
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return self.db.select(options);
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});
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},
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/**
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* 获取一条记录的某个字段值
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* @return {[type]} [description]
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*/
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getField: function(field, sepa){
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field = field.trim();
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var options = this.parseOptions({
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"field": field
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});
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var multi = false;
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if (field.indexOf(",") > -1) {
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if (options.limit === undefined && is_number(sepa)) {
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options.limit = sepa;
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};
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multi = true;
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}else{
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options.limit = is_number(sepa) ? sepa : 1;
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}
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return this.db.select(options).then(function(data){
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if (!data) {
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return {};
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};
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if (multi) {
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var length = field.split(",").length;
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var field = Object.keys(data[0]);
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var key = field.shift();
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var key2 = field.shift();
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var cols = {};
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data.forEach(function(item){
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var name = item[key];
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if (length === 2) {
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cols[name] = item[key2];
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}else{
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cols[name] = is_string(sepa) ? item.join(sepa) : item;
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}
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});
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return cols;
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}else{
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if (sepa !== true && options.limit == 1) {
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return data[0];
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};
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return data.forEach(function(val){
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return val[field];
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})
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}
|
|
});
|
|
},
|
|
/**
|
|
* 对保存的数据进行处理
|
|
* @param {[type]} data [description]
|
|
* @return {[type]} [description]
|
|
*/
|
|
facade: function(data){
|
|
|
|
return data;
|
|
},
|
|
_before_write: function(){}
|
|
}
|
|
}).extend(function(){
|
|
//追加的方法
|
|
var methods = {
|
|
initMethod: function(){
|
|
var self = this;
|
|
this.promise.then(function(){
|
|
var field = self.fields["_field"];
|
|
field.forEach(function(item){
|
|
var name = "getBy" + parse_name(item, 1);
|
|
self[name] = function(arg){
|
|
var where = {}
|
|
where[item] = arg;
|
|
return this.where(where).find();
|
|
}
|
|
var fieldName = "getFieldBy" + parse_name(item, 1);
|
|
self[fieldName] = function(arg, arg1){
|
|
var where = {};
|
|
where[item] = arg;
|
|
return this.where(where).getField(arg1);
|
|
}
|
|
})
|
|
})
|
|
}
|
|
};
|
|
// 链操作方法列表
|
|
var methodNameList = [
|
|
'table','order','alias','having','group',
|
|
'lock','distinct','auto','filter','validate'
|
|
];
|
|
methodNameList.forEach(function(item){
|
|
methods[item] = function(data){
|
|
this.options[item] = data;
|
|
return this;
|
|
}
|
|
});
|
|
['count','sum','min','max','avg'].forEach(function(item){
|
|
methods[item] = function(data){
|
|
var field = data || "*";
|
|
return this.getField(item.toUpperCase() + "(" + field + ") AS tp_" + item);
|
|
}
|
|
});
|
|
return methods;
|
|
}) |