Question

我有2张桌子。

category (id, name, description, keywords, visibility) 
orders (id, category_id, price_id, name, telephone, date, processed)

模型类别

public static function tableName()
{
    return 'category';
}
public function getOrders()
{
    return $this->hasMany(Orders::className(), ['category_id' => 'id']);
}

function getPrices()
{
    return $this->hasMany(Price::className(), ['category_id' => 'id']);
}

和模型订单

public static function tableName()
{
    return 'orders';
}
public function getCategory()
{
    return $this->hasOne(Category::className(), ['id' => 'category_id']);
}


public function getPrice()
{
    return $this->hasOne(Price::className(), ['id' => 'price_id']);
}

我想在显示统计数据类别时显示每个类别的订单数量。怎么做？

树构建代码

<?php  foreach ($cat as $item) :?>
                                        <ul class="treeview">
                                            <?php if ($item['id'] !=  17): ?>
                                                <li><a href="#"><?=$item['name']?> - 3</a>
                                                    <ul>
                                                        <?php  foreach ($price as $itemok) :?>
                                                            <?php if ($item['id'] ==  $itemok['category_id']): ?>
                                                                <li><a href="#"><?=$itemok['name']?></a></li>
                                                            <?php endif; ?>
                                                        <?php endforeach; ?>
                                                    </ul>
                                                </li>
                                            <?php endif; ?>
                                        </ul>
                                    <?php endforeach; ?>

Answer 1

您可以通过多种方式查看以下示例

$categories = Category::find()->all();

foreach($categories as $category){
    echo count($category->orders);
    echo $category->getOrders()->count();
}

或在模型类别

中创建单独的方法

public function getOrderCount(){
    return $this->getOrders()->count();
}

然后像

一样使用它

$category->orderCount;

如何获得每个类别的订单数量？

1 个答案: