如何使用 CakePHP 从估计中获取总价以显示在 index.ctp 中
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【中文标题】如何使用 CakePHP 从估计中获取总价以显示在 index.ctp 中【英文标题】：How to get total price from estimate to show up in index.ctp using CakePHP 【发布时间】：2011-07-21 18:09:53 【问题描述】：我有 Estimates hasMany EstimateDetails hasMany Items。我要做的是对我的估计索引视图进行总计。
$estimates 对 index.ctp 的调试：
Array
(
[0] => Array
(
[Estimate] => Array
(
[id] => 1
[name] => City Base Cinema 10
[employee_id] => 1
[created] => 2011-07-12 18:08:37
[modified] => 2011-07-12 18:08:37
)
[Employee] => Array
(
[id] => 1
[first_name] => Edward
[last_name] => Ramon
[phone] => 2106959672
[hourly_pay] => 0.00
[position_id] => 2
[created] => 2011-07-12 17:56:42
[modified] => 2011-07-12 17:56:42
[fullname] => Edward Ramon
[Position] => Array
(
[id] => 2
[name] => Estimator
)
[Estimate] => Array
(
[0] => Array
(
[id] => 1
[name] => City Base Cinema 10
[employee_id] => 1
[created] => 2011-07-12 18:08:37
[modified] => 2011-07-12 18:08:37
)
)
[Job] => Array
(
)
)
[EstimateDetail] => Array
(
[0] => Array
(
[id] => 1
[estimate_id] => 1
[qty] => 10
[item_id] => 1
[feet] => 10
[inches] => 2
[adjustment] => -0.20
[Estimate] => Array
(
[id] => 1
[name] => City Base Cinema 10
[employee_id] => 1
[created] => 2011-07-12 18:08:37
[modified] => 2011-07-12 18:08:37
)
[Item] => Array
(
[id] => 1
[type] => W
[eje] => W
[description] => 44x335
[price unit] => perpound
[weight] => 335
[price] => 0.80
[fulldesc] => W44x335
)
)
[1] => Array
(
[id] => 3
[estimate_id] => 1
[qty] => 3
[item_id] => 1
[feet] => 4
[inches] => 5
[adjustment] => 0.00
[Estimate] => Array
(
[id] => 1
[name] => City Base Cinema 10
[employee_id] => 1
[created] => 2011-07-12 18:08:37
[modified] => 2011-07-12 18:08:37
)
[Item] => Array
(
[id] => 1
[type] => W
[eje] => W
[description] => 44x335
[price unit] => perpound
[weight] => 335
[price] => 0.80
[fulldesc] => W44x335
)
)
[2] => Array
(
[id] => 4
[estimate_id] => 1
[qty] => 10
[item_id] => 1
[feet] => 10
[inches] => 10
[adjustment] => 0.00
[Estimate] => Array
(
[id] => 1
[name] => City Base Cinema 10
[employee_id] => 1
[created] => 2011-07-12 18:08:37
[modified] => 2011-07-12 18:08:37
)
[Item] => Array
(
[id] => 1
[type] => W
[eje] => W
[description] => 44x335
[price unit] => perpound
[weight] => 335
[price] => 0.80
[fulldesc] => W44x335
)
)
[3] => Array
(
[id] => 5
[estimate_id] => 1
[qty] => 10
[item_id] => 3
[feet] => 10
[inches] => 10
[adjustment] => 0.00
[Estimate] => Array
(
[id] => 1
[name] => City Base Cinema 10
[employee_id] => 1
[created] => 2011-07-12 18:08:37
[modified] => 2011-07-12 18:08:37
)
[Item] => Array
(
[id] => 3
[type] => W
[eje] => W
[description] => 44x290
[price unit] => perpound
[weight] => 290
[price] => 0.80
[fulldesc] => W44x290
)
)
[4] => Array
(
[id] => 6
[estimate_id] => 1
[qty] => 10
[item_id] => 6
[feet] => 10
[inches] => 2
[adjustment] => 0.00
[Estimate] => Array
(
[id] => 1
[name] => City Base Cinema 10
[employee_id] => 1
[created] => 2011-07-12 18:08:37
[modified] => 2011-07-12 18:08:37
)
[Item] => Array
(
[id] => 6
[type] => PL
[eje] => PL
[description] => 4X3
[price unit] => ea
[weight] => 1
[price] => 0.30
[fulldesc] => PL4X3
)
)
)
[Job] => Array
(
[0] => Array
(
[id] => 1
[job_number] => 2353
[name] => City Base Cinema 10
[company_id] => 1
[estimate_id] => 1
[contract_amount] => 253000
[employee_id] => 2
[location_id] => 1
[created] => 2011-07-12 18:17:59
[modified] => 2011-07-16 12:17:55
[Company] => Array
(
[id] => 1
[name] => Search Construction
[address] => 123 street
[city] => San Antonio
[state] => TX
[zip] => 78023
[company_type_id] => 1
[created] => 2011-07-12 18:16:37
[modified] => 2011-07-12 18:16:37
)
[Estimate] => Array
(
[id] => 1
[name] => City Base Cinema 10
[employee_id] => 1
[created] => 2011-07-12 18:08:37
[modified] => 2011-07-12 18:08:37
)
[Employee] => Array
(
[id] => 2
[first_name] => Adam
[last_name] => Morales
[phone] =>
[hourly_pay] => 20.00
[position_id] => 1
[created] => 2011-07-16 12:16:49
[modified] => 2011-07-16 12:16:49
[fullname] => Adam Morales
)
[Location] => Array
(
[id] => 1
[address] => 456 street
[city] => Helotes
[state] => TX
[zip] => 78023
[location_type_id] => 1
[full_local] => 456 street Helotes, TX 78023
)
)
)
)
)
我尝试在 Estimate Model 上设置 variableField：
var $virtualFields = array('total' => 'SUM(EstimateDetail.qty*EstimateDetail.Item.weight*EstimateDetail.Item.price)');
我的索引.ctp：
<tr>
<th><?php echo $this->Paginator->sort('id');?></th>
<th><?php echo $this->Paginator->sort('name');?></th>
<th><?php echo $this->Paginator->sort('employee');?></th>
<th><?php echo $this->Paginator->sort('created');?></th>
<th><?php echo $this->Paginator->sort('modified');?></th>
<th class="actions"><?php __('Actions');?></th>
</tr>
<?php
$i = 0;
foreach ($estimates as $estimate):
$class = null;
if ($i++ % 2 == 0)
$class = ' class="altrow"';
?>
<tr<?php echo $class;?>>
<td><?php echo $estimate['Estimate']['id']; ?> </td>
<td><?php echo $estimate['Estimate']['name']; ?> </td>
<td>
<?php echo $this->html->link($estimate['Employee']['fullname'], array('controller' => 'employees', 'action' => 'view', $estimate['Employee']['id'])); ?>
</td>
<td><?php echo $estimate['Estimate']['created']; ?> </td>
<td class="actions">
<?php echo $this->Html->link(__('View', true), array('action' => 'view', $estimate['Estimate']['id'])); ?>
<?php echo $this->Html->link(__('Edit', true), array('action' => 'edit', $estimate['Estimate']['id'])); ?>
<?php echo $this->Html->link(__('Delete', true), array('action' => 'delete', $estimate['Estimate']['id']), null, sprintf(__('Are you sure you want to delete # %s?', true), $estimate['Estimate']['id'])); ?>
</td>
</tr>
我得到一个错误。
我得到的错误是：
Warning (2): Invalid argument supplied for foreach() [APP/views/estimates/index.ctp, line 15]
和 Sql：
1054: Unknown column 'EstimateDetail.qty' in 'field list
请帮忙。
【问题讨论】：
您需要在此处发布错误，我们无法猜测。我在某处听说您不能将聚合与 virtualFields 一起使用，不确定是否是问题所在。 【参考方案1】：简短的回答是 - 不要试图用 SQL/virtualFields 做你正在做的事情（如果你愿意，我可以详细说明原因）。
只需通过foreach($estimates) 迭代您的结果并在 PHP 中自己计算总和。
更新：在您的示例中，您不能（轻松）在 find() 中使用聚合 (SUM)，因为：
-
为此，find 应该在一个查询中完成 - 即使用
JOINs - 并且 Cake 不会在 hasMany 关系上自愿使用 JOINs（它会使用许多简单的 SELECTs），这意味着你必须手动完成 (http://book.cakephp.org/view/1047/Joining-tables)。
使用SUM 的查询将只返回一行（分组），这意味着您必须执行简单的子查询才能同时获得SUM 和您的结果。
【讨论】：
是的，如果您可以详细说明并且结果已经在 foreach 中，但是我如何获得 item 数组和 EstimaeDetail 数组的计算？ 我加了 $total = 0; foreach($estimate['EstimateDetail'] as $estimateDetail) $total += ($estimateDetail['Item']['price']+$estimateDetail['adjustment'])*$estimateDetail['Item']['重量']*($estimateDetail['feet']+($estimateDetail['inches']/12))*$estimateDetail['qty'];并得到了我想要的结果。谢谢lxa以上是关于如何使用 CakePHP 从估计中获取总价以显示在 index.ctp 中的主要内容，如果未能解决你的问题，请参考以下文章
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