[英]Nested while loop issue, second one loops only once and stops
I have coding issue that I am unable to resolve myself so need your help. 我的编码问题无法解决,因此需要您的帮助。
I have two queries fetching data from the same table: 我有两个查询从同一张表中获取数据:
$rs_main_model
gets all unique models using GROUP BY $rs_main_model
使用GROUP BY获取所有唯一模型
$rs_variant
gets all models with their respective options, ie all columns from the table. $rs_variant
获取所有具有各自选项的模型,即表中的所有列。
What I am doing is to run a while loop to list all unique models - $rs_main_model
and then inside the same div
run second loop to list all matching models from $rs_variant
: 我正在做的是运行一个while循环以列出所有唯一模型-
$rs_main_model
,然后在同一div
运行第二个循环以列出$rs_variant
中所有匹配的模型:
<?php while (!$rs_main_model->EOF) { ?>
<div>
<div>
<h2<?php echo $rs_main_model->fields['model']; ?></h2>
</div>
<div>
<?php while (!$rs_variant->EOF) { ?>
<?php echo $rs_variant->fields['variant']; ?>
<?php $rs_variant->MoveNext(); } ?>
</div>
</div>
<?php $rs_main_model->MoveNext(); } ?>
Below is an example of the actual and desired output: 以下是实际和所需输出的示例:
The output should look something like this: | However what I end up with is this:
Model A Model A - Variant1 | Model A Model A - Variant1
Model A - Variant2 | Model A - Variant2
Model A - Variant3 | Model A - Variant3
Model B Model B - Variant1 | Model B
Model C Model C - Variant1 | Model C
Model C - Variant2 |
What changes should I make to the while
loops to make this work? 为了使这项工作有效,我应该对
while
循环进行哪些更改? Thank you! 谢谢!
You should update the $rs_variant results on every iteration inside the outer loop by using as condition the $rs_main_model->fields['model']. 您应该使用$ rs_main_model-> fields ['model']作为条件,在外循环内的每次迭代中更新$ rs_variant结果。 Try the following
尝试以下
<?php while (!$rs_main_model->EOF) { ?>
<div>
<div>
<h2<?php echo $rs_main_model->fields['model']; ?></h2>
<?php $sql_variant = "SELECT * FROM tbl_catalog WHERE model_body = '".$rs_main_model->fields['model_body']."'"; $rs_variant = $db -> Execute($sql_variant); ?>
</div>
<div>
<?php while (!$rs_variant->EOF) { ?>
<?php echo $rs_variant->fields['variant']; ?>
<?php $rs_variant->MoveNext(); } ?>
</div>
</div>
<?php $rs_main_model->MoveNext(); } ?>
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