逻辑上选择类别和子类别(php,joomla,javascript,ajax)

Question

您好我已经为joomla安装了jbusinessdirectory组件,并且我在tmpl/default.php文件中有名为mod_jbusinessdirectory的模块(这是商业列表的搜索模块)我有选择代码:(见下文)

<?php if($params->get('showCategories')){ ?>
    <div class="select">
        <div class="categoryic"></div>
        <select name="categorySearch" class="select-styled" id="categories">
    <option value="0">category</option>
    <?php foreach($categories as $category){?>
    <option value="<?php echo $category->id?>" <?php echo $session->get('categorySearch')==$category->id && $preserve?" selected ":"" ?> ><?php echo $category->name?></option>
    <?php if(!empty($category->subcategories)){?>
    <?php foreach($category->subcategories as $subCat){?>
    <option value="<?php echo $subCat->id?>" <?php  echo $session->get('categorySearch')==$subCat->id && $preserve?" selected ":"" ?> >-- <?php echo $subCat->name?></option>
    <?php }?>
      <?php }?>
      <?php }?>
    </select>
    </div>
 <?php }?>

从这段代码我得到类别和子类别,如下所示:

• 主要类别1

• 子类别1子类别2子类别3

• 主要类别2

• 子类别1子类别2子类别3

截图在这里:类别和子类别截图

在helper.php中,我有从数据库中获取类别和子类别的函数

static function getMainCategories(){
    $db = JFactory::getDBO();
    $query = ' SELECT * FROM #__jbusinessdirectory_categories where parent_id=1 and published=1  order by name';
    $db->setQuery($query);
    return $db->loadObjectList();
}

static function getSubCategories(){
    $db = JFactory::getDBO();
    $query = ' SELECT c.* FROM #__jbusinessdirectory_categories c
               inner join  #__jbusinessdirectory_categories  cc  on c.parent_id = cc.id  where c.parent_id!=1  and cc.parent_id = 1 and c.published=1
               order by c.name';
    $db->setQuery($query,0,1000);
    $result = $db->loadObjectList();

    return $result;
}

最后在modjbusinesdirectory.php文件中我有这样的PHP:

if($params->get('showCategories')){
    $categories =  modJBusinessDirectoryHelper::getMainCategories();
    if($params->get('showSubCategories')){
        $subCategories = modJBusinessDirectoryHelper::getSubCategories();
        foreach($categories as $category){
            foreach($subCategories as $subCat){
                if($category->id == $subCat->parent_id){
                    if(!isset($category->subcategories)){
                        $category->subcategories = array();
                    }
                    $category->subcategories[] = $subCat;
                }
            }
        }
    }
}

类别和子类别表结构截图 在这里

我的问题是:如何制作两个选择查询而不是一个.在第一个查询中我得到主要类别,在第二个查询中我得到子类别(例如:如果我从第一个查询中选择主要类别书籍,在第二个查询中我选择子类别,它必须仅显示具有子类别的书籍儿童书籍).

Answer 1

看起来代码已经完成了您想要的操作。您想要 2 个查询，但有 2 个。但是，我认为这 2 个查询的结果合并为 1 个结果，而您希望将其分成 2 个结果。

您必须添加接受类别 ID 参数的新类别函数。

<?php

static function getCategoryById($id){
  $id = intval( $id ); 
  $db = JFactory::getDBO();
  $query = '
       SELECT * 
       FROM #__jbusinessdirectory_categories
       WHERE 
             published=1
         AND id= '.$id;
  $db->setQuery($query);
  return $db->loadObject();
}

static function getChildCategoryList($id){
  $id = intval($id);
  $db = JFactory::getDBO();
  $query = '
       SELECT c.*
       FROM #__jbusinessdirectory_categories c
       INNER JOIN  #__jbusinessdirectory_categories  cc
         ON c.parent_id = cc.id
       WHERE c.parent_id!=1
       AND cc.id = '.$id.'
       AND c.published=1
       ORDER BY c.name';
     $db->setQuery($query,0,1000);
     $result = $db->loadObjectList();

     return $result;
}

我不熟悉检索参数的 Joomla 代码，但如果在有人选择主类别时发布它，您可以找到 ID。

<?php
if($params->get('showCategories')){
    $categoryId = (int) $params->get('mainCategory');
    $category   =  modJBusinessDirectoryHelper::getCategoriesById($categoryId);

    $subCategories = modJBusinessDirectoryHelper::getChildCategoryList($categoryId);
    }
}