我目前正在开发一个Web应用程序（用PHP编写，基于Yii），除其他外，它允许您连接产品的不同价格值。每个产品可以有多个价格，但系统的构建方式我可以轻松（并且正确）确定价格字段的类型 - 因此，虽然每个产品可以有多个价格字段，但它只能有一种类型的价格领域。
我卡住的部分是当我必须在列表中显示这些字段的存储值，并按顺序排列列表视图时 - 我可以正确显示它们并按一列排序，但是一旦我尝试要使列表可以被所有列排序（当然不是在同一时间），行开始显示错误的值。
以下是相关的代码：
在模型中，关系：
'productPriceConnects' => array(Product::HAS_MANY, 'ProductPriceConnect', 'product_id'),
'price1' => array(Product::HAS_ONE, 'ProductPriceConnect', 'product_id',
'joinType' => 'LEFT JOIN',
'on' => 'priceBeszerzesi.product_price_field_id=:product_price_field_id AND priceBeszerzesi.active = 1',
'params' => array(':product_price_field_id' =>ProductPriceField::model()->findByAttributes(array('active' => 1, 'type' => 1, 'category' => 6))->id),
'alias' => 'priceBeszerzesi',
),
'price2' => array(Product::HAS_ONE, 'ProductPriceConnect', 'product_id',
'joinType' => 'LEFT JOIN',
'on' => 'priceEladasi.product_price_field_id=:product_price_field_id AND priceEladasi.active = 1',
'params' => array(':product_price_field_id' => ProductPriceField::model()->findByAttributes(array('active' => 1, 'type' => 1, 'category' => 1))->id),
'alias' => 'priceEladasi'
),
'price3' => array(Product::HAS_ONE, 'ProductPriceConnect', 'product_id',
'joinType' => 'LEFT JOIN',
'on' => 'priceAkcios.product_price_field_id=:product_price_field_id AND priceAkcios.active = 1',
'params' => array(':product_price_field_id' => ProductPriceField::model()->findByAttributes(array('active' => 1, 'type' => 1, 'category' => 5))->id),
'alias' => 'priceAkcios'
),
在模型中，搜索：
...
$criteria->with('price1', 'price2', 'price3);
...
$criteria->compare('price1.price', $this->beszerzesi, true);
$criteria->compare('price2.price', $this->eladasi, true);
$criteria->compare('price3.price', $this->akcios, true);
...
$sort->attributes = array(
'price1' =>array(
'asc' => 'priceBeszerzesi.price ASC',
'desc' => 'priceBeszerzesi.price DESC',
),
'price2' =>array(
'asc' => 'priceEladasi.price ASC',
'desc' => 'priceEladasi.price DESC',
),
'priceAkcios' =>array(
'asc' => 'price3.price ASC',
'desc' => 'price3.price DESC',
),
'*'
);
...
return new CActiveDataProvider($this, array(
'criteria' => $criteria,
'sort' => $sort,
'pagination' => array(
'pageSize' => 10,
),
)
);
gridview中列的数据：
'eladasi' => array(
'name' => 'price2',
'header' => 'Eladási ár',
'type' => 'raw',
'headerHtmlOptions' => array('class' => 'auto-width text-center'),
'value' => '!empty($data->price2->price) ? $data->price2->price == "" ? "-" : $data->price2->price : "-"',
'htmlOptions' => array('class' => 'border-right auto-width text-center'),
),
'akcios' => array(
'name' => 'priceAkcios',
'header' => 'Akciós',
'value' => '!empty($data->price3->price) ? $data->price3->price == "" ? "-" : $data->price3->price : "-"',
'headerHtmlOptions' => array('class' => 'auto-width text-center'),
'htmlOptions' => array('class' => 'border-right auto-width text-center'),
),
'beszerzesi' => array(
'name' => 'price1',
'header' => 'Beszerzési ár',
'type' => 'raw',
'value' => '!empty($data->price1->price) ? $data->price1->price == "" ? "-" : $data->price1->price : "-"',
'headerHtmlOptions' => array('class' => 'auto-width text-center'),
'htmlOptions' => array('class' => 'border-right auto-width text-center'),
),
此代码可以通过所有三个与关系相关的列对列表进行排序，但每列显示相同的值 - with数组中最后一个关系的值。如果数组中的最后一个元素是price3，则列显示price3关系的值。
当我从with数组中删除所有关系名称时，我可以按该列排序，而不是其他列。
我的问题是： 有什么办法吗？ 1）确实向模型添加任意数量的关系，连接到同一个db字段，但根据条件， 2）并显示这些值，同时根据它们进行排序？
答案 0 :(得分：2)
查找以下解决方案：
我在我的系统中创建了这些表，并使用了您的关系和gridview代码。我对该代码进行了一些更改，现在在下面的代码中，搜索和排序工作正常。
我在模型类中定义了三个变量，即
public $beszerzesi;
public $eladasi;
public $akcios;
然后我改变了与左连接一起使用的关系数组中的参数名称。这是代码中的主要问题。您为参数使用相同的名称，即:product_price_field_id我为每个参数指定了不同的名称。当yii准备sql查询时，它将替换分配给查询的参数。在您的情况下，它替换了所有三个参数的相同值。
我还对CActiveDataProvider中传递的排序和比较属性进行了一些更改。您可以在下面的模型文件中找到所有更改。
<强> Product.php
<?php
/**
* This is the model class for table "product".
*
* The followings are the available columns in table 'product':
* @property integer $id
* @property string $name
*/
class Product extends CActiveRecord
{
public $beszerzesi;
public $eladasi;
public $akcios;
/**
* @return string the associated database table name
*/
public function tableName()
{
return 'product';
}
/**
* @return array validation rules for model attributes.
*/
public function rules()
{
// NOTE: you should only define rules for those attributes that
// will receive user inputs.
return array(
array('name', 'required'),
array('name', 'length', 'max' => 100),
// The following rule is used by search().
// @todo Please remove those attributes that should not be searched.
array('id, name, beszerzesi, eladasi,akcios', 'safe', 'on' => 'search'),
);
}
/**
* @return array relational rules.
*/
public function relations()
{
// NOTE: you may need to adjust the relation name and the related
// class name for the relations automatically generated below.
return array(
'productPriceConnects' => array(Product::HAS_MANY, 'ProductPriceConnect', 'product_id'),
'price1' => array(Product::HAS_ONE, 'ProductPriceConnect', 'product_id',
'joinType' => 'LEFT JOIN',
'on' => 'priceBeszerzesi.product_price_field_id=:product_price_field_id1 AND priceBeszerzesi.active = 1',
'params' => array(':product_price_field_id1' => ProductPriceField::model()->findByAttributes(array('active' => 1, 'type' => 1, 'category' => 6))->id),
'alias' => 'priceBeszerzesi',
),
'price2' => array(Product::HAS_ONE, 'ProductPriceConnect', 'product_id',
'joinType' => 'LEFT JOIN',
'on' => 'priceEladasi.product_price_field_id=:product_price_field_id2 AND priceEladasi.active = 1',
'params' => array(':product_price_field_id2' => ProductPriceField::model()->findByAttributes(array('active' => 1, 'type' => 1, 'category' => 1))->id),
'alias' => 'priceEladasi'
),
'price3' => array(Product::HAS_ONE, 'ProductPriceConnect', 'product_id',
'joinType' => 'LEFT JOIN',
'on' => 'priceAkcios.product_price_field_id=:product_price_field_id3 AND priceAkcios.active = 1',
'params' => array(':product_price_field_id3' => ProductPriceField::model()->findByAttributes(array('active' => 1, 'type' => 1, 'category' => 5))->id),
'alias' => 'priceAkcios'
),
);
}
/**
* @return array customized attribute labels (name=>label)
*/
public function attributeLabels()
{
return array(
'id' => 'ID',
'name' => 'Name',
);
}
/**
* Retrieves a list of models based on the current search/filter conditions.
*
* Typical usecase:
* - Initialize the model fields with values from filter form.
* - Execute this method to get CActiveDataProvider instance which will filter
* models according to data in model fields.
* - Pass data provider to CGridView, CListView or any similar widget.
*
* @return CActiveDataProvider the data provider that can return the models
* based on the search/filter conditions.
*/
public function search()
{
// @todo Please modify the following code to remove attributes that should not be searched.
$criteria = new CDbCriteria;
$criteria->with = array('price1', 'price2', 'price3');
$criteria->compare('id', $this->id);
$criteria->compare('name', $this->name, true);
$criteria->compare('priceBeszerzesi.price', $this->beszerzesi, true);
$criteria->compare('priceEladasi.price', $this->eladasi, true);
$criteria->compare('priceAkcios.price', $this->akcios, true);
// $criteria->attributes = ;
return new CActiveDataProvider($this, array(
'criteria' => $criteria,
'sort' => array(
'attributes' => array(
'beszerzesi' => array(
'asc' => 'priceBeszerzesi.price',
'desc' => 'priceBeszerzesi.price DESC',
),
'eladasi' => array(
'asc' => 'priceEladasi.price',
'desc' => 'priceEladasi.price DESC',
),
'akcios' => array(
'asc' => 'priceAkcios.price',
'desc' => 'priceAkcios.price DESC',
),
'*'
)
),
'pagination' => array(
'pageSize' => 10,
),
)
);
}
/**
* Returns the static model of the specified AR class.
* Please note that you should have this exact method in all your CActiveRecord descendants!
* @param string $className active record class name.
* @return Product the static model class
*/
public static function model($className = __CLASS__)
{
return parent::model($className);
}
}
gridview代码
<?php $this->widget('zii.widgets.grid.CGridView', array(
'id' => 'product-grid',
'dataProvider' => $model->search(),
'filter' => $model,
'columns' => array(
'id',
'name',
'eladasi' => array(
'name' => 'eladasi',
'header' => 'Eladási ár',
'type' => 'raw',
'headerHtmlOptions' => array('class' => 'auto-width text-center'),
'value' => '!empty($data->price2->price) ? $data->price2->price == "" ? "-" : $data->price2->price : "-"',
'htmlOptions' => array('class' => 'border-right auto-width text-center'),
),
'akcios' => array(
'name' => 'akcios',
'header' => 'Akciós',
'value' => '!empty($data->price3->price) ? $data->price3->price == "" ? "-" : $data->price3->price : "-"',
'headerHtmlOptions' => array('class' => 'auto-width text-center'),
'htmlOptions' => array('class' => 'border-right auto-width text-center'),
),
'beszerzesi' => array(
'name' => 'beszerzesi',
'header' => 'Beszerzési ár',
'type' => 'raw',
'value' => '!empty($data->price1->price) ? $data->price1->price == "" ? "-" : $data->price1->price : "-"',
'headerHtmlOptions' => array('class' => 'auto-width text-center'),
'htmlOptions' => array('class' => 'border-right auto-width text-center'),
),
array(
'class' => 'CButtonColumn',
),
),
)); ?>
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