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Editorial Team
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Asked: 2026-06-17T09:34:34+00:00

I have a page where I render items from my database in reversed chronological

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I have a page where I render items from my database in reversed chronological order. Last added item is the first item on top of the page.

I use infinite scrolling, so everytime the user hits the bottom, I send pagenumber and resultcount to my server. There I use propel paginate to get the next page.

The problem is, when an user adds a new item on the page it will be added to my database and is the first item on page 1 in my results. So all other results are shifted by 1 position.
Is there a way to tell propel that it should start at offset+1 to ignore the new added element?

A little example:

I have 5 items per page. In this example every item has only a number, so on the page you can see 1,2,3,4,5. Now, a user adds the item 0. My database results w/o pagination is now:
0,1,2,3,4,5 because the new item is added. Now the user hits the bottom of the page and the pagination has the attributes page = 2, items per page = 5 and I will get 5,6,7,8,9. Now my page renders the 5 again. If I could say propel that the initial offset should start after the first item, the result would be ok.

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1 Answer

  1. Editorial Team

    Just an idea, haven’t tried the code myself, but you could add a timestamp to the search criteria and pass it in with the paging so that all search results are restricted to records created before the current search began:

    <?php
$page = (isset($_GET['page']))?$_GET['page']:1;
$timeFilter = (isset($_GET['time']))?$_GET['time']:date("Y-m-d H:i:s", time());

$posts = PostQuery::create()
  ->filterByCreatedAt($timeFilter, Criteria::LESS_THAN)
  // add other filters as necessary
  ->paginate($page, $limit);
// Obviously there is a lot of other things to include, just an example...
?>
<html>
<head>
  <title>Paging Example</title>
</head>
<body>
  <ul id='results'>
    <?php foreach ($posts as $post) {

      echo "<li>".$post->getTitle()."</li>";

    } ?>
  </ul>

  <div id='paging'>
    <?php
    if (!$pager->isFirstPage()) {
      echo "<a href='thisFile.php?page=".$pager->getPreviousPage()."&time=".$timeFilter."'>Previous Page</a>";
    }

    // may want to add a page list here...

    if (!$pager->isLastPage()) {
      echo "<a href='thisFile.php?page=".$pager->getNextPage()."&time=".$timeFilter."'>Next Page</a>";
    }

    ?>
  </div>
  </body>
</html>
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