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Yii: Creating Demo Blog 2
Post Management
======================================================================================A) Customizing Post Model
1) Customizing rules() Method
2) Customizing Relations() Method
3) Adding URL Property
4) Representing Status In Text
B) Creating and Updating Post
1) Customizing Access Control
2) Customizing create and update Operations
C) Displaying Posts
1) Customizing View Operations
2) Customizing index Operation
D) Managing Posts
DOWNLOAD
======================================================================================
A) Customizing Post Model
1) Customizing rules() Method
1.1) Modify {webroot}/protected/model/Post.php
Edit rules()
public function rules()
{
return array(
array('title, content, status', 'required'),
array('title', 'length', 'max'=>128),
array('status', 'in', 'range'=>array(1,2,3)),
array('tags', 'match', 'pattern'=>'/^[\w\s,]+$/',
'message'=>'Tags can only contain word characters.'),
array('tags', 'normalizeTags'),
array('title, status', 'safe', 'on'=>'search'),
);
}
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1.2) Add New Method normalizeTags() to {webroot}/protected/model/Post.php
public function normalizeTags($attribute,$params)
{
$this->tags=Tag::array2string(array_unique(Tag::string2array($this->tags)));
}
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1.3) Add New Methods to {webroot}/protected/model/Tags.php
public static function string2array($tags)
{
return preg_split('/\s*,\s*/',trim($tags),-1,PREG_SPLIT_NO_EMPTY);
}
public static function array2string($tags)
{
return implode(', ',$tags);
}
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2) Customizing Relations() Method
2.1) Modify {webroot}/protected/model/Post.php
Edit relations()
public function relations()
{
return array(
'author' => array(self::BELONGS_TO, 'User', 'author_id'),
'comments' => array(self::HAS_MANY, 'Comment', 'post_id',
'condition'=>'comments.status='.Comment::STATUS_APPROVED,
'order'=>'comments.create_time DESC'),
'commentCount' => array(self::STAT, 'Comment', 'post_id',
'condition'=>'status='.Comment::STATUS_APPROVED),
);
}
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2.2) Modify {webroot}/protected/model/Comment.php
Add.
const STATUS_PENDING=1;
const STATUS_APPROVED=2;
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3) Adding URL Property
3.1) Modify {webroot}/protected/model/Post.php
Add.
public function getUrl()
{
return Yii::app()->createUrl('post/view', array(
'id'=>$this->id,
'title'=>$this->title,
));
}
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4) Representing Status In Text
4.1) Modify {webroot}/protected/model/Lookup.php
Add.
private static $_items=array();
public static function items($type)
{
if(!isset(self::$_items[$type]))
self::loadItems($type);
return self::$_items[$type];
}
public static function item($type,$code)
{
if(!isset(self::$_items[$type]))
self::loadItems($type);
return isset(self::$_items[$type][$code]) ? self::$_items[$type][$code] : false;
}
private static function loadItems($type)
{
self::$_items[$type]=array();
$models=self::model()->findAll(array(
'condition'=>'type=:type',
'params'=>array(':type'=>$type),
'order'=>'position',
));
foreach($models as $model)
self::$_items[$type][$model->code]=$model->name;
}
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4.2) Modify {webroot}/protected/model/Post.php
Add constants.
const STATUS_DRAFT=1;
const STATUS_PUBLISHED=2;
const STATUS_ARCHIVED=3;
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B) Creating and Updating Post
1) Customizing Access Control
1.1) Modify {webroot}/protected/controllers/PostController.php
Edit accessRules().
public function accessRules()
{
return array(
array('allow', // allow all users to perform 'list' and 'show' actions
'actions'=>array('index', 'view'),
'users'=>array('*'),
),
array('allow', // allow authenticated users to perform any action
'users'=>array('@'),
),
array('deny', // deny all users
'users'=>array('*'),
),
);
}
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2) Customizing create and update Operations
2.1) Modify {webroot}/protected/views/post/_form.php
Replace status Text Field with dropDownList.
<?php echo $form->dropDownList($model,'status',Lookup::items('PostStatus')); ?>
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2.2) Modify {webroot}/protected/models/Post.php
Add beforeSave()
Add afterSave()
Add $_oldTag
Add afterFind()
Add $_oldTag
Add afterFind()
protected function beforeSave()
{
if(parent::beforeSave())
{
if($this->isNewRecord)
{
$this->create_time=$this->update_time=time();
$this->author_id=Yii::app()->user->id;
}
else
$this->update_time=time();
return true;
}
else
return false;
}
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protected function afterSave()
{
parent::afterSave();
Tag::model()->updateFrequency($this->_oldTags, $this->tags);
}
private $_oldTags;
protected function afterFind()
{
parent::afterFind();
$this->_oldTags=$this->tags;
}
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C) Displaying Posts
1) Customizing View Operations
1.1) Modify {webroot}/protected/controllers/PostController.php
public function actionView()
{
$post=$this->loadModel();
$this->render('view',array(
'model'=>$post,
));
}
private $_model;
public function loadModel()
{
if($this->_model===null)
{
if(isset($_GET['id']))
{
if(Yii::app()->user->isGuest)
$condition='status='.Post::STATUS_PUBLISHED
.' OR status='.Post::STATUS_ARCHIVED;
else
$condition='';
$this->_model=Post::model()->findByPk($_GET['id'], $condition);
}
if($this->_model===null)
throw new CHttpException(404,'The requested page does not exist.');
}
return $this->_model;
}
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2) Customizing index Operation
2.1) Modify {webroot}/protected/controllers/PostController.php
Edit actionIndex().
public function actionIndex()
{
$criteria=new CDbCriteria(array(
'condition'=>'status='.Post::STATUS_PUBLISHED,
'order'=>'update_time DESC',
'with'=>'commentCount',
));
if(isset($_GET['tag']))
$criteria->addSearchCondition('tags',$_GET['tag']);
$dataProvider=new CActiveDataProvider('Post', array(
'pagination'=>array(
'pageSize'=>5,
),
'criteria'=>$criteria,
));
$this->render('index',array(
'dataProvider'=>$dataProvider,
));
}
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2.2) Modify {webroot}/protected/views/post/index.php
Replace all.
<?php if(!empty($_GET['tag'])): ?>
<h1>Posts Tagged with <i><?php echo CHtml::encode($_GET['tag']); ?></i></h1>
<?php endif; ?>
<?php $this->widget('zii.widgets.CListView', array(
'dataProvider'=>$dataProvider,
'itemView'=>'_view',
'template'=>"{items}\n{pager}",
)); ?>
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D) Managing Posts
1) Listing Posts in Tabular View
1.1) Modify {webroot}/protected/controllers/PostController.php
Edit actionAdmin()
public function actionAdmin()
{
$model=new Post('search');
if(isset($_GET['Post']))
$model->attributes=$_GET['Post'];
$this->render('admin',array(
'model'=>$model,
));
}
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1.2) Modify {webroot}/protected/views/post/admin.php
Replace All.
<?php
$this->breadcrumbs=array(
'Manage Posts',
);
?>
<h1>Manage Posts</h1>
<?php $this->widget('zii.widgets.grid.CGridView', array(
'dataProvider'=>$model->search(),
'filter'=>$model,
'columns'=>array(
array(
'name'=>'title',
'type'=>'raw',
'value'=>'CHtml::link(CHtml::encode($data->title), $data->url)'
),
array(
'name'=>'status',
'value'=>'Lookup::item("PostStatus",$data->status)',
'filter'=>Lookup::items('PostStatus'),
),
array(
'name'=>'create_time',
'type'=>'datetime',
'filter'=>false,
),
array(
'class'=>'CButtonColumn',
),
),
)); ?>
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2) Deleting Posts
2.1) Modify {webroot}/protected/controllers/PostController.php
Edit actionDelete.
public function actionDelete()
{
if(Yii::app()->request->isPostRequest)
{
// we only allow deletion via POST request
$this->loadModel()->delete();
if(!isset($_GET['ajax']))
$this->redirect(array('index'));
}
else
throw new CHttpException(400,'Invalid request. Please do not repeat this request again.');
}
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2.2) Modify {webroot}/protected/models/Post.php
Edit afterDelete()
protected function afterDelete()
{
parent::afterDelete();
Comment::model()->deleteAll('post_id='.$this->id);
Tag::model()->updateFrequency($this->tags, '');
}
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ReplyDeleteI like your suggestions they are really helpful. Thank you so much for sharing this post.
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