php - 带有 4 个参数的 Joomla 逻辑 PHP 查询

Question

逻辑查询

你好，

我们有两个逻辑

a) 联系客户的最大次数:标记联系客户的次数限制。我们将供应商联系客户的最大次数设置为 2 次。有了这个php代码

$max = 2;
$listing = JRequest::getInt('listing');

if($listing) {
$db = JFactory::getDBO();
$db->setQuery("SELECT COUNT(`SubmissionId`) FROM #__rsform_submission_values WHERE `FormId`='".(int) $formId."' AND `FieldName`='listing' AND `FieldValue`='".$listing."' ");
$nrSub = $db->loadResult();

if ($nrSub >= $max) {
  $formLayout = '<p><em>Sorry, This customer has already been contacted maximum number of times</em></p>';
}
}

b) 供应商可以在表格中联系客户的最大次数

$max = 10;
$user = JFactory::getUser();
$db   = JFactory::getDbo();
$query   = $db->getQuery(true);
 
$query->select('COUNT('.$db->qn('Username').')')
    ->from($db->qn('#__rsform_submissions'))
    ->where($db->qn('FormId').'='.$db->q($formId))
    ->where($db->qn('Username').'='.$db->q($user->get('username')));
 
$db->setQuery($query);
$counter = $db->loadResult();
 
if ($counter >= $max){
  $formLayout = '<p style="color:blue;">You have already contacted 10 customers </p>';
}

两者都运作良好 - 现在我们必须设置一个条件:- 如果经销商尝试再次联系他之前联系过的同一位客户，也应该显示一条错误消息

猜猜它会基于4个参数

Count submission and compare it with Max Parameter as 1

Formid

Listing

Username

尝试此代码 - 但似乎不尊重

$max = 1;
$user = JFactory::getUser();
$listing = JRequest::getInt('listing');

if($listing) {
$db = JFactory::getDBO();
$db->setQuery("SELECT COUNT('.$db->qn('Username').') FROM #__rsform_submission_values WHERE `FormId`='".(int) $formId."' AND `FieldName`='listing' AND `FieldValue`='".$listing."' ");
$nrSub = $db->loadResult();

if ($nrSub >= $max) {
  $formLayout = '<p><strong>Sorry, You have already contacted this customer</strong></p>';
}
}

以便它匹配 - 如果用户名已经联系过表单的列表 ID - 那么应该显示一条错误消息

可能是代码中需要加入用户名参数- 1

有人可以协助、帮助和建议以实现所需的 - 如何设置逻辑查询

Answer 1

如果您使用 COUNT，我认为您也应该应用 GROUP BY，例如:

SELECT COUNT('.$db->qn('Username').') FROM #__rsform_submission_values WHERE `FormId`='".(int) $formId."' AND `FieldName`='listing' AND `FieldValue`='".$listing."' GROUP BY '.$db->qn('Username').'"