PHP-菜鸟之家-第114页

CDbCommand和ActiveRecord区别?

2024-03-14BraveCherry阅读(130)

用CDbCommand操作CRUD和用Active Record有什么区别?
权威指南介绍:
Active Record是为了不让我们写冗长的SQL语句,在性能调节上又说:不要滥用 Active Record。虽然 Active Record 擅长以一个 OOP样式模型化数据，它实际上为了它需要创建一个或几个对象来代表每条查询结果降低了性能。对于数据密集的应用，在底层使用 DAO 或数据库接口将是一个更好的选择。

哪位大神能具体说一下什么情况下用Active Record合适，而什么情况下又是我们直接写SQL执行合适呢?

单表的时候，用AR很快，多表联合的时候，用sql更快。
其实AR也是调用了CDbCommand，在CActiveRecord的1297行(版本1.1.13)
用AR的话可以使用Scenario，Scope等，另外，zii跟AR绑定比较深，用zii的话就要用AR

ThisapplicationrequiresthatPHPwascompiledwithBlowfishsupportforcrypt()

2024-03-14Aibytom阅读(132)

环境是appserv,

php5.2.6

各种方法都试了,还是不行,

把libmcrypt.dll和php_mcrypt.dll复制到php\ext\和system32的方法都试了,还是不行,

为什么呀,

检测时是通过的

Mcrypt扩展模块

通过

CSecurityManager

This is required by encrypt and decrypt methods.

php版本太低。需要超过5.3

cform使用问题：只显示button

2024-03-14dmcrab阅读(98)

model:User.php

<?php

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 * Description of User
 *
 * @author Administrator
 */
class User extends CActiveRecord {

    //静态类
    public static function model($className = __CLASS__) {
        return parent::model($className);
    }

    //表名
    public function tableName() {
        return '{{user}}';
    }

    //cform配置文件
    public function getFMConfig() {
        return array(
            'elements' => array(
                'name' => array('type' => 'text', 'maxlength' => 80),
                'password' => array('type' => 'password', 'maxlength' => 80),
            ),
            'buttons' => array(
                'button' => array('type' => 'submit', 'label' => '提交'),
            ),
        );
    }

}

--------------------------------

controller UserController.php

<?php

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 * Description of UserController
 *
 * @author Administrator
 */
class UserController extends Controller{
    public function actionRegister(){
        $user = new User();
        $form = new CForm($user->getFMConfig(), $user);

        $this->render('register',array('form'=>$form));
    }

    
}

——————————–

view :register.php

<?php echo $form ?>

———————————————————————-

现象：只显示提交按钮。不显示，input框

如果在elemtns属性中设置label 属性，也能显示，就是不显示正常input框

原理参见源代码 CForm类的renderElement方法片段，如果没有设置则不会进行elements中每一个element的渲染；而button的显示条件不一样，所以会显示出来。
需要在model类中加入rules方法，如：
就可以显示出来了
或者这样：
都是为了让元素具有可见性。

YII日志的时间格式（时区）不对。

2024-03-14lovelypony阅读(120)

在配置中打开日志功能

runtime/application.log这个文件的时区格式不对。

比北京时间晚7个小时。

修改php.ini里面的date.timezone
或者在入口文件里面date_default_timezone_set
晚8个小时吧，目测是美国时间= =不知道怎么调

新手问几个yii的小问题

2024-03-14Fionasuper阅读(127)

新手求教：

1、在完成一个程序之后，yii框架还有用吗？（需要将它和程序一起打包上传到服务器使用吗？）

2、可以将yii.php 改为其他名称吗？例如core.php。这样会有什么影响？

第一个是需要上传的。
第二个应该是可以改的，我没试过。不过你做好访问控制和权限，别人是访问不到这个文件的，所以没必要改名。
嗯似的

CActiveDataProvider这个类是用来分页的吗？

2024-03-14Jimapple阅读(151)

RT

这个类是Yii里面用来分页的类吗？

刚刚接触Yii 在手册里看了看也没看到什么非也信息

请教大家一下

如果是的话大家是怎么用的？

如果不是的话，在Yii里面做分页的话应该怎么用？

不是。
这种问题自己看手册就行了。
http://www.yiichina.com/api/CPagination

请问能否将modules的视图文件分离出来放在themes目录下?

2024-03-14Aibydear阅读(99)

各位大侠,请问能否将modules的视图文件分离出来放在themes目录下?可以的话如何解决?小弟先谢谢了.

直接放到themes目录下与module同名的目录即可，例如
themes/classic/views/admin/article/create.php
可以指定好渲染视图的路径就好

关于两表联查问题

2024-03-14Harryfans阅读(87)

CActiveDataProvider中的各个参数都什么意思,怎么弄都报错…

参考criteria的with和join属性，CActiveDataProvider第一参数是Model类，第二个参数是模型类对应的查询条件，一般是一个criteria实例。

《应用Yii1.1...敏捷Web开发》actionAdduser的问题

2024-03-14Tinasuper阅读(121)

我在添加这个action到ProjectController类的时候显示

Missing argument 1 for ProjectController::loadModel(), called in /home/wwwroot/trackstar/protected/controllers/ProjectController.php on line 197 and defined

public function actionAdduser()

{

<span class="php-hl-var" style="color: blue;">$form</span><span class="php-hl-code" style="color: gray;">=</span><span class="php-hl-reserved" style="font-weight: bold;">new</span> <span class="php-hl-identifier" style="color: green;">ProjectUserForm</span><span class="php-hl-code" style="color: gray;">; 
</span><span class="php-hl-var" style="color: blue;">$project</span><span class="php-hl-code" style="color: gray;"> = </span><span class="php-hl-var" style="color: blue;">$this</span><span class="php-hl-code" style="color: gray;">-&gt;</span><span class="php-hl-identifier" style="color: green;">loadModel</span><span class="php-hl-brackets" style="color: olive;">(</span><span class="php-hl-brackets" style="color: olive;">)</span><span class="php-hl-code" style="color: gray;">;</span><span class="php-hl-code"><span style="color:#ff0000;">// 这一段的loadModel() 上面的函数只有 loadModel($id),</span></span><span class="php-hl-code" style="color: gray;">
</span><span class="php-hl-comment" style="color: rgb(128, 128, 128); font-style: italic;">//</span><span class="php-hl-comment" style="color: rgb(128, 128, 128); font-style: italic;"> collect user input data</span>
<span class="php-hl-reserved" style="font-weight: bold;">if</span><span class="php-hl-brackets" style="color: olive;">(</span><span class="php-hl-reserved" style="font-weight: bold;">isset</span><span class="php-hl-brackets" style="color: olive;">(</span><span class="php-hl-var" style="color: blue;">$_POST</span><span class="php-hl-brackets" style="color: olive;">[</span><span class="php-hl-quotes" style="color: red;">'</span><span class="php-hl-string" style="color: red;">ProjectUserForm</span><span class="php-hl-quotes" style="color: red;">'</span><span class="php-hl-brackets" style="color: olive;">]</span><span class="php-hl-brackets" style="color: olive;">)</span><span class="php-hl-brackets" style="color: olive;">)</span> <span class="php-hl-brackets" style="color: olive;">{</span>
    <span class="php-hl-var" style="color: blue;">$form</span><span class="php-hl-code" style="color: gray;">-&gt;</span><span class="php-hl-identifier" style="color: green;">attributes</span><span class="php-hl-code" style="color: gray;">=</span><span class="php-hl-var" style="color: blue;">$_POST</span><span class="php-hl-brackets" style="color: olive;">[</span><span class="php-hl-quotes" style="color: red;">'</span><span class="php-hl-string" style="color: red;">ProjectUserForm</span><span class="php-hl-quotes" style="color: red;">'</span><span class="php-hl-brackets" style="color: olive;">]</span><span class="php-hl-code" style="color: gray;">; 
    </span><span class="php-hl-var" style="color: blue;">$form</span><span class="php-hl-code" style="color: gray;">-&gt;</span><span class="php-hl-identifier" style="color: green;">project</span><span class="php-hl-code" style="color: gray;"> = </span><span class="php-hl-var" style="color: blue;">$project</span><span class="php-hl-code" style="color: gray;">; </span><span class="php-hl-comment" style="color: rgb(128, 128, 128); font-style: italic;">//</span><span class="php-hl-comment" style="color: rgb(128, 128, 128); font-style: italic;"> validate user input and set a sucessfull flassh message if valid</span>
    <span class="php-hl-reserved" style="font-weight: bold;">if</span><span class="php-hl-brackets" style="color: olive;">(</span><span class="php-hl-var" style="color: blue;">$form</span><span class="php-hl-code" style="color: gray;">-&gt;</span><span class="php-hl-identifier" style="color: green;">validate</span><span class="php-hl-brackets" style="color: olive;">(</span><span class="php-hl-brackets" style="color: olive;">)</span><span class="php-hl-brackets" style="color: olive;">)</span> 
    <span class="php-hl-brackets" style="color: olive;">{</span>
        <span class="php-hl-identifier" style="color: green;">Yii</span><span class="php-hl-code" style="color: gray;">::</span><span class="php-hl-identifier" style="color: green;">app</span><span class="php-hl-brackets" style="color: olive;">(</span><span class="php-hl-brackets" style="color: olive;">)</span><span class="php-hl-code" style="color: gray;">-&gt;</span><span class="php-hl-identifier" style="color: green;">user</span><span class="php-hl-code" style="color: gray;">-&gt;</span><span class="php-hl-identifier" style="color: green;">setFlash</span><span class="php-hl-brackets" style="color: olive;">(</span><span class="php-hl-quotes" style="color: red;">'</span><span class="php-hl-string" style="color: red;">success</span><span class="php-hl-quotes" style="color: red;">'</span><span class="php-hl-code" style="color: gray;">,</span><span class="php-hl-var" style="color: blue;">$form</span><span class="php-hl-code" style="color: gray;">-&gt;</span><span class="php-hl-identifier" style="color: green;">username</span><span class="php-hl-code" style="color: gray;"> . </span><span class="php-hl-quotes" style="color: red;">&quot;</span><span class="php-hl-string" style="color: red;"> has been added to the project.</span><span class="php-hl-quotes" style="color: red;">&quot;</span> <span class="php-hl-brackets" style="color: olive;">)</span><span class="php-hl-code" style="color: gray;">;
        </span><span class="php-hl-var" style="color: blue;">$form</span><span class="php-hl-code" style="color: gray;">=</span><span class="php-hl-reserved" style="font-weight: bold;">new</span> <span class="php-hl-identifier" style="color: green;">ProjectUserForm</span><span class="php-hl-code" style="color: gray;">;
    </span><span class="php-hl-brackets" style="color: olive;">}</span>
<span class="php-hl-brackets" style="color: olive;">}</span>
<span class="php-hl-comment" style="color: rgb(128, 128, 128); font-style: italic;">//</span><span class="php-hl-comment" style="color: rgb(128, 128, 128); font-style: italic;"> display the add user form </span>
<span class="php-hl-var" style="color: blue;">$users</span><span class="php-hl-code" style="color: gray;"> = </span><span class="php-hl-identifier" style="color: green;">User</span><span class="php-hl-code" style="color: gray;">::</span><span class="php-hl-identifier" style="color: green;">model</span><span class="php-hl-brackets" style="color: olive;">(</span><span class="php-hl-brackets" style="color: olive;">)</span><span class="php-hl-code" style="color: gray;">-&gt;</span><span class="php-hl-identifier" style="color: green;">findAll</span><span class="php-hl-brackets" style="color: olive;">(</span><span class="php-hl-brackets" style="color: olive;">)</span><span class="php-hl-code" style="color: gray;">; 
</span><span class="php-hl-var" style="color: blue;">$usernames</span><span class="php-hl-code" style="color: gray;">=</span><span class="php-hl-reserved" style="font-weight: bold;">array</span><span class="php-hl-brackets" style="color: olive;">(</span><span class="php-hl-brackets" style="color: olive;">)</span><span class="php-hl-code" style="color: gray;">; 
</span><span class="php-hl-reserved" style="font-weight: bold;">foreach</span><span class="php-hl-brackets" style="color: olive;">(</span><span class="php-hl-var" style="color: blue;">$users</span> <span class="php-hl-reserved" style="font-weight: bold;">as</span> <span class="php-hl-var" style="color: blue;">$user</span><span class="php-hl-brackets" style="color: olive;">)</span> 
<span class="php-hl-brackets" style="color: olive;">{</span>
    <span class="php-hl-var" style="color: blue;">$usernames</span><span class="php-hl-brackets" style="color: olive;">[</span><span class="php-hl-brackets" style="color: olive;">]</span><span class="php-hl-code" style="color: gray;">=</span><span class="php-hl-var" style="color: blue;">$user</span><span class="php-hl-code" style="color: gray;">-&gt;</span><span class="php-hl-identifier" style="color: green;">username</span><span class="php-hl-code" style="color: gray;">;
</span><span class="php-hl-brackets" style="color: olive;">}</span>
<span class="php-hl-var" style="color: blue;">$form</span><span class="php-hl-code" style="color: gray;">-&gt;</span><span class="php-hl-identifier" style="color: green;">project</span><span class="php-hl-code" style="color: gray;"> = </span><span class="php-hl-var" style="color: blue;">$project</span><span class="php-hl-code" style="color: gray;">; 
</span><span class="php-hl-var" style="color: blue;">$this</span><span class="php-hl-code" style="color: gray;">-&gt;</span><span class="php-hl-identifier" style="color: green;">render</span><span class="php-hl-brackets" style="color: olive;">(</span><span class="php-hl-quotes" style="color: red;">'</span><span class="php-hl-string" style="color: red;">adduser</span><span class="php-hl-quotes" style="color: red;">'</span><span class="php-hl-code" style="color: gray;">,</span><span class="php-hl-reserved" style="font-weight: bold;">array</span><span class="php-hl-brackets" style="color: olive;">(</span><span class="php-hl-quotes" style="color: red;">'</span><span class="php-hl-string" style="color: red;">model</span><span class="php-hl-quotes" style="color: red;">'</span><span class="php-hl-code" style="color: gray;">=&gt;</span><span class="php-hl-var" style="color: blue;">$form</span><span class="php-hl-code" style="color: gray;">, </span><span class="php-hl-quotes" style="color: red;">'</span><span class="php-hl-string" style="color: red;">usernames</span><span class="php-hl-quotes" style="color: red;">'</span><span class="php-hl-code" style="color: gray;">=&gt;</span><span class="php-hl-var" style="color: blue;">$usernames</span><span class="php-hl-brackets" style="color: olive;">)</span><span class="php-hl-brackets" style="color: olive;">)</span><span class="php-hl-code" style="color: gray;">;

}

函数就只有这个

public function loadModel($id)
{
$model=Project::model()->findByPk($id);
if($model===null)
throw new CHttpException(404,’The requested page does not exist.’);
return $model;
}

求问应该怎么改

亲，应该这么调用：$this->loadModel($id)

我想做一个站多少钱啊

2024-03-14kenfans阅读(129)

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PHP 第114页