如何在智能模板引擎中执行嵌套的 foreach 循环

Question

我是 smarty 的新手，并试图实现一个嵌套的 foreach 循环。所以我有两个表子类别和成员，其中成员和子类别可以通过subcategory_id连接。例如，大约有 5 个类别和大约 50 名成员属于这 5 个类别中的任何一个。我想先循环子类别，然后显示每个类别下的成员。但是我不能在聪明中做第二个foreach。在普通的 php 中，我可以做到，但在聪明中却不能。请帮忙。

PHP代码

$result = mysqli_query($conn,"SELECT * FROM subCategory ");
$list_subchannels = array();
while ( $row = mysqli_fetch_assoc($result) )
{
        $subcategory = $row['subcat_id'];
        $result1 = mysqli_query($conn,"SELECT * FROM member JOIN subCategory ON member.subcategory_id = subCategory.subcat_id WHERE member.subcategory_id = '$subcategory' ");
        $list_subchannels = array();
        while ( $row1 = mysqli_fetch_assoc($result1) )
        {
            $list_subchannels[] = $row1;
            $smarty->assign($row1['subcat_name'],$list_subchannels);
        }

        $list_subcategories[] = $row;
        $smarty->assign("subcategory",$list_subcategories);
}

.tpl 代码是

{foreach from=$subcategory key=k item=b}
    Sub Category Names: {$b.subcat_name}
    <!-- Listing Item -->
    {foreach from=$b.subcat_name key=k item=a}
                    <h3>Member Name: {$a.channel_name}</h3>
                    <span>Member Id: {$a.member_id}</span>
    {/foreach}                
    <!-- Listing Item / End -->
{/foreach}

它正确显示所有子类别名称（即第一个 foreach），但显示它们下的成员。蒂亚

Answer 1

PHP 代码：

$result = mysqli_query($conn,"SELECT * FROM subCategory ");
$list_subchannels = array();
while ( $row = mysqli_fetch_assoc($result) )
{
    $subcategory = $row['subcat_id'];
    $result1 = mysqli_query($conn,"SELECT * FROM member JOIN subCategory ON member.subcategory_id = subCategory.subcat_id WHERE member.subcategory_id = '$subcategory' ");
    $list_subchannels = array();
    while ( $row1 = mysqli_fetch_assoc($result1) )
    {
        // $list_subchannels[] = $row1; // COMMENT
        // $smarty->assign($row1['subcat_name'],$list_subchannels); // COMMENT
        $list_subchannels[$subcategory] = $row1; // HERE
    }
    $list_subcategories[] = $row;
    $smarty->assign("subcategory",$list_subcategories);
    $smarty->assign("subchannels", $list_subchannels); // HERE
}

TPL代码：

{foreach from=$subcategory key=k item=b}
    Sub Category Names: {$b.subcat_name}
    <!-- Listing Item -->
    {foreach from=$subchannels[$b.subcat_id] key=k item=a} // HERE
                <h3>Member Name: {$a.channel_name}</h3>
                <span>Member Id: {$a.member_id}</span>
    {/foreach}                
    <!-- Listing Item / End -->
{/foreach}

Answer 2

尝试使用 {function} {/function}。

例如：

{function name=subcategory_listing level=0}
    {foreach $subcategory as $subc}
        {if $level == 0}
            Sub Category Names: {$subc.subcat_name}
        {else}
            <h3>Member Name: {$subc.channel_name}</h3>
            <span>Member Id: {$subc.member_id}</span>
        {/if}
        {subcategory_listing cats=$subc.subcat_name level=$level+1}
    {/foreach}
 {/function}
 {subcategory_listing cats=$subcategory}