一.model设计构造查询 QueryBuilder 提供了一个简便,流畅的 SQL 查询构造器.在不影响代码可读性的前提下用来快速的建立 SQL 语句. QueryBuilder 在功能上与 ORM 重合, 但是各有利弊.ORM 更适用于简单的 CRUD 操作,而 QueryBuilder 则更适用于复杂的查询,例如查询中包含子查询和多重联结. 1.model设计构造查询 示例: // User 包装了下面的查询结果 type User struct { Name string Age int
看到构造语意的其中一节“继承体系下的对象构造”(5.2节)的最后,看来原文,发现侯杰的翻译有问题,怪不得读起来不顺. What about when providing an argument for a base class constructor? Is it still physically safe to invoke a virtual function of the class within its constructor's member initialization list?
insert into table (field1,field2)values('1','2');delete from table where condition update table set field=valueselect XXX from table TP$model =new Model $model -> where(xxx)->seleect();$model->save($data);$model->add($data);YII2 CURD 2
Backbone 作者在源码中做了很好的注释,这里只是锦上添花,补充一些个人的理解而已. // Backbone.js 1.2.3 // (c) 2010-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors // Backbone may be freely distributed under the MIT license. // For all details and documentation: