使用復選框從表中刪除行
[英]Delete rows from table using checkboxes
問題描述
我試圖基於復選框從表中刪除多行，但是我不太確定如何最好地解決它。 目前，我有一部電影列表，並且我希望能夠根據是否已選擇來刪除其中一部或多部電影。
// Update Watchlist
if ($submit == 'Update Watchlist') {
require_once("db_connect.php");
$watchlist_name = clean_string($_POST['watchlist-name']);
$watchlist_description = clean_string($_POST['watchlist-description']);
$watchlist_category = $_POST['watchlist-category'];
$updateWatchlist_bad_message = '';
if (!empty($watchlist_name)) {
if ($watchlist_name = clean_string($watchlist_name)) {
$update_watchlist_name_query = "UPDATE watchlists SET name = '$watchlist_name' WHERE watchlist_id = " . $watchlist_id;
mysql_query($update_watchlist_name_query) or die("Insert failed. " . mysql_error() . "<br />" . $$update_watchlist_name_query);
}
}
if (!empty($watchlist_description)) {
if ($watchlist_description = clean_string($watchlist_description)) {
$update_watchlist_description_query = "UPDATE watchlists SET description = '$watchlist_description' WHERE watchlist_id = " . $watchlist_id;
mysql_query($update_watchlist_description_query) or die("Insert failed. " . mysql_error() . "<br />" . $$update_watchlist_description_query);
}
}
if ($watchlist_category != "") {
$update_watchlist_category_query = "UPDATE watchlists SET category = '$watchlist_category' WHERE watchlist_id = " . $watchlist_id;
mysql_query($update_watchlist_category_query) or die("Insert failed. " . mysql_error() . "<br />" . $$update_watchlist_category_query);
}
if(isset($_POST['film-name'])) {
$checkbox = $_POST['film-name'];
$count = count($checkbox);
for($i = 0; $i < $count; $i++) {
$id = (int) $checkbox[$i]; // Parse your value to integer
if ($id > 0) { // and check if it's bigger then 0
mysql_query("DELETE FROM watchlist_films WHERE film_id = $rt_id");
}
}
} else {
$updateWatchlist_bad_message = '<div class="alert alert-error">Sorry, but we can\'t do that at the minute. Please try again later.</div>';
}
require_once("db_close.php");?>
<script type="text/javascript">
window.location = "watchlist.php?id=<?php echo $watchlist_id; ?>"
</script><?php
}
適當的字符串是電影名稱，並且我嘗試使用此解決方案-PHP刪除帶有多個復選框的SQL行 -但是，由於電影沒有從其包含的監視列表中刪除，因此它不起作用。
基本上，查詢的邏輯如下：
- 檢查是否選中了一個復選框
- 如果勾選了一個復選框，請檢查是否也勾選了其他復選框
- 從監視列表中刪除所有已勾選的電影
我不確定以上是否是最簡單的方法，例如，檢查是否勾選了多個復選框可能更簡單，更干凈，而不是先檢查是否勾選了任何復選框，然后再進行檢查如果其他人也是如此。
UPDATE
只是想我將提供更多信息來闡明-下面顯示了我在監視列表中顯示的所有電影的實際foreach（為格式道歉）：
foreach ($films as $key => $film_item) {
include ("watchlist-film-controller.php");?>
<label class="checkbox input-block-level">
<p class="pull-right"><?php echo $title; ?></p>
<input type="checkbox" class="input-block-level" name="film-name[]"
value="<?php echo $title; ?>">
</label><?php
}
更新2
為了回答這篇文章中的兩個（非常感謝！）評論，這里有更多有關當前情況的信息。 我已經嘗試過兩種解決方案，但是都沒有用。 就目前而言，我已經實現了didierc提供的解決方案，目前我的代碼如下所示：
<?php
/*
ini_set('display_errors', 1);
error_reporting(E_ALL);
*/
$rt_id = $film_item['film_id'];
$watchlist_id = $_GET['id'];
include_once('/api/RottenTomatoes.php');
$rottenTomatoes = new RottenTomatoes('2b2cqfxyazbbmj55bq4uhebs', 10, 'us');
/* echo "<pre>"; */
try {
$result = $rottenTomatoes->getMovieInfo($rt_id);
//print_r($result);
} catch (Exception $e) {
//print_r($e);
}
/* echo "</pre>"; */
$title = $result['title'];
$year = $result['year'];
$critics_consensus = $result['critics_consensus'];
$poster_thumb = $result['posters']['thumbnail'];
// Update Watchlist
if ($submit == 'Update Watchlist') {
require_once("db_connect.php");
$watchlist_name = clean_string($_POST['watchlist-name']);
$watchlist_description = clean_string($_POST['watchlist-description']);
$watchlist_category = $_POST['watchlist-category'];
$updateWatchlist_bad_message = '';
if (!empty($watchlist_name)) {
if ($watchlist_name = clean_string($watchlist_name)) {
$update_watchlist_name_query = "UPDATE watchlists SET name = '$watchlist_name' WHERE watchlist_id = " . $watchlist_id;
mysql_query($update_watchlist_name_query) or die("Insert failed. " . mysql_error() . "<br />" . $$update_watchlist_name_query);
}
}
if (!empty($watchlist_description)) {
if ($watchlist_description = clean_string($watchlist_description)) {
$update_watchlist_description_query = "UPDATE watchlists SET description = '$watchlist_description' WHERE watchlist_id = " . $watchlist_id;
mysql_query($update_watchlist_description_query) or die("Insert failed. " . mysql_error() . "<br />" . $$update_watchlist_description_query);
}
}
if ($watchlist_category != "") {
$update_watchlist_category_query = "UPDATE watchlists SET category = '$watchlist_category' WHERE watchlist_id = " . $watchlist_id;
mysql_query($update_watchlist_category_query) or die("Insert failed. " . mysql_error() . "<br />" . $$update_watchlist_category_query);
}
if(isset($_POST['film-name'])) {
$films = array_map('intval', $_POST['film-name']); // make sure that every film id is an integer
mysql_query("DELETE FROM watchlist_films WHERE film_id IN (" . implode(',', $films) . ") AND watchlist_id = " . $watchlist_id);
} else {
$updateWatchlist_bad_message = '<div class="alert alert-error">Sorry, but we can\'t do that at the minute. Please try again later.</div>';
}
require_once("db_close.php");?>
<script type="text/javascript">
window.location = "watchlist.php?id=<?php echo $watchlist_id; ?>"
</script><?php
}
$rt_id是每部電影的唯一ID，並會傳遞給表單，因此查詢知道在這種情況下應刪除哪部電影。 影片的名稱僅用於使實際的刪除形式更易於閱讀，而不是打印ID號列表，因為用戶將無法知道哪個ID與哪部影片匹配。 在嘗試了給出的兩種解決方案后，它們似乎都沒有起作用，但是沒有錯誤返回-表單已提交，但是所選影片不會從監視列表中刪除。
更新3
為了回應Didierc的評論，以下是發生了什么的完整分解：
- 監視列表分為兩個表-
watchlists和watchlist_films。watchlists包含簡單的信息，例如監視列表ID，名稱和描述，以及創建監視列表的用戶的用戶ID。watchlist_films僅包含監視列表ID和監視列表包含的電影ID（$rt_id）。 甲監視列表占用在單個行watchlists在表中和多個行watchlist_films表（作為一個監視列表可以有多個膜）。 - 電影信息是從Rotten Tomatoes和TMDb API中獲取的，這就是電影ID（
$rt_id）的來源-每部電影都有一個完全唯一的$rt_id。
監視列表的完整“處理代碼”在Update 2中 ，但是HTML呈現如下：
<?php
include("checklog.php");
require_once("watchlist-controller.php");
?>
<!DOCTYPE html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link rel="shortcut icon" href="img/fav.ico">
<link rel="apple-touch-icon" href="img/apple-touch-icon.png">
<title>Screening - Your ticket to your movies - <?php echo $watchlist_name; ?></title>
<meta name="description" content="Screening is a brand new take on the traditional movie database, fusing social networking and multimedia to provide a clear, concise experience allowing you to share your favourite movies, and discover new classics.">
<meta name="keywords" content="Movies, Films, Screening, Discover, Watch, Share, experience, database, movie database, film database, share film, share films, discover film, discover films, share movie, share movies, discover movie, discover movies">
<!-- Bootstrap -->
<link href="css/bootstrap.css" rel="stylesheet" media="screen">
<link href="css/bootstrap-responsive.css" rel="stylesheet">
<link href="css/custom-bootstrap.css" rel="stylesheet">
<link rel="stylesheet" href="fonts.css" type="text/css" />
<link rel="stylesheet/less" type="text/css" href="css/stylesheet.less" />
<script src="js/less-1.3.3.min.js" type="text/javascript"></script>
<script type="text/javascript" src="//ajax.googleapis.com/ajax/libs/jquery/1.8/jquery.min.js"></script>
<script src="js/bootstrap.min.js"></script>
<!-- Start Google Analytics -->
<script type="text/javascript">
var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-36943512-1']);
_gaq.push(['_trackPageview']);
(function() {
var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();
</script>
<!-- End Google Analytics -->
<!-- Start Google Analytics -->
<script type="text/javascript">
var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-36943512-1']);
_gaq.push(['_trackPageview']);
(function() {
var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();
</script>
<!-- End Google Analytics -->
</head>
<body>
<div class="container"><?php
require_once ("header.php");?>
<div class="well main-content">
<p class="page-title"><?php echo $watchlist_name; ?></p>
<div class="row-fluid">
<section class="span3 sidebar pull-left">
<p class="sidebar-text"><span class="bold">NAME: </span><?php echo $watchlist_name; ?></p>
<p class="sidebar-text"><span class="bold">CATEGORY: </span><?php echo $watchlist_category; ?></p>
<div class="alert alert-info"><?php echo $watchlist_description; ?></div>
<a href="#watchlistUpdate" class="btn btn-primary btn-block" data-toggle="modal" title="Update Watchlist">Update Watchlist</a>
<a href="#watchlistDelete" class="btn btn-danger btn-block" data-toggle="modal" title="Delete Watchlist">Delete Watchlist</a>
<a href="profile.php" class="btn btn-block" title="Logout">Your Profile</a>
</section>
<section class="span9 watchlist-holder">
<!-- Loading bar -->
<!--
<div class="progress progress-striped active">
<div class="bar" style="width: 100%;"></div>
</div>
-->
<ul class="unstyled"><?php
foreach($films as $key => $film_item) {
include ("watchlist-film-controller.php");?>
<li class="well list-item clearfix">
<div class="row-fluid">
<a href="movie.php?id=<?php echo $rt_id; ?>" class="span1 pull-left" title="<?php echo $title; ?>"><img src="<?php echo $poster_thumb; ?>" alt="<?php echo $title; ?> poster" title="<?php echo $title; ?> poster" /></a>
<div class="span11 movie-info">
<p class="search-title"><a href="movie.php?id=<?php echo $film_item['film_id']; ?>" title="<?php echo $title; ?> (<?php echo $year; ?>)"><?php echo $title; ?></a> <small>(<?php echo $year; ?>)</small></p><?php
if ($critics_consensus == "") {?>
<p class="watchlist-synopsis">No overview available</p><?php
} else {?>
<p class="watchlist-synopsis"><?php echo $critics_consensus; ?></p><?php
}?>
</div>
</div>
</li><?php
}?>
</ul>
</section>
<div id="watchlistUpdate" class="modal hide fade" tabindex="-1" role="dialog" aria-labelledby="watchlistUpdateLabel" aria-hidden="true">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
<h3 id="watchlistUpdateLabel" class="modal-title">Update Watchlist</h3>
</div>
<form name="watchlist-updater" class="watchlist-updater" action="watchlist.php?id=<?php echo $watchlist_id; ?>" method='POST'>
<div class="modal-body">
<?php echo $updateWatchlist_bad_message; ?>
<div class="alert alert-info">Use the boxes below to change the Watchlist name and description</div>
<input type="text" class="input-block-level" name="watchlist-name" alt="watchlist-name" placeholder="<?php echo $watchlist_name; ?>">
<textarea rows="3" class="input-block-level" name="watchlist-description" title="Watchlist Description" placeholder="<?php echo $watchlist_description; ?>"></textarea>
<label for="Watchlist Category" class="pull-left inline-label" title="Watchlist Category">Watchlist Category</label>
<select class="input-block-level" name="watchlist-category" title="Watchlist Category">
<option value="" title=""></option>
<option value="General" title="General">General</option>
<option value="To watch" title="To watch">To watch</option>
<option value="To share" title="To share">To share</option>
<option value="Favourites" title="Favourites">Favourites</option>
</select>
<div class="alert alert-info">Use the checkbox to the left of each film to remove it from the Watchlist</div><?php
foreach ($films as $key => $film_item) {
include ("watchlist-film-controller.php");?>
<label class="checkbox input-block-level">
<p class="pull-right"><?php echo $title; ?></p>
<input type="checkbox" class="input-block-level" name="film-name" value="<?php echo $title; ?>">
</label><?php
}?>
</div>
<div class="modal-footer">
<button type="button" class="btn" data-dismiss="modal" aria-hidden="true">Close</button>
<button type="submit" class="btn btn-success" name="submit" value="Update Watchlist">Update Watchlist</button>
</div>
</form>
</div>
<div id="watchlistDelete" class="modal hide fade" tabindex="-1" role="dialog" aria-labelledby="watchlistDeleteLabel" aria-hidden="true">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
<h3 id="watchlistDeleteLabel" class="modal-title">Delete Watchlist</h3>
</div>
<div class="modal-body">
<?php echo $deleteWatchlist_bad_message; ?>
<div class="alert alert-error alert-block">
<p>Deleting this Watchlist will delete all its containing films from your profile. This information will not be recoverable.</p>
<p>Please only delete this Watchlist if you are absolutely sure you want to purge all the information it contains.</p>
</div>
<p>Are you sure you want to delete this Watchlist?</p>
</div>
<div class="modal-footer">
<form name="watchlist-delete" class="watchlist-delete" action="watchlist.php?id=<?php echo $watchlist_id; ?>" method="POST"><?php
include ("watchlist-film-controller.php");?>
<button type="button" class="btn" data-dismiss="modal" aria-hidden="true">Do not delete this Watchlist</button>
<button type="submit" class="btn btn-danger" name="submit" value="Delete Watchlist">Delete Watchlist</button>
</form>
</div>
</div>
</div>
</div>
<?php include 'footer.html'; ?>
</div>
</body>
</html>
監視列表的實際更新在#updateWatchlist模式中。 需要更多信息，我很樂意提供！
2 個解決方案
解決方案1
1 2013-03-30 12:05:36
我認為問題之一是您正在通過$rt_id刪除。 但是，在前面的行中，它僅稱為id 。 除此之外，我現在看不到任何明顯的問題。 如果那不起作用，請嘗試將要發送到數據庫的SQL查詢打印出來，方法是將mysql_query替換為echo並提供給我們輸出。
另外，還有一個快速提示：現在，您正在逐部刪除電影。 根據所選擇的電影數量，這可能會引起明顯的性能影響。 如何在一個查詢中將它們全部刪除？
if(isset($_POST['film-name'])) {
$films = array_map('intval', $_POST['film-name']); // make sure that every film id is an integer
mysql_query("DELETE FROM watchlist_films WHERE film_id IN (" . implode(',', $films) . ")");
}
解決方案2
1 2013-03-30 12:18:23
一些奇怪的事情：
在您的刪除循環中，您從
$checkbox檢查了$id，但是您使用了$rt_id：我認為這是它不起作用的原因。對於監視列表描述，您可以在其上調用
clean_string兩次，一次是從$_POST獲取一次，另一次是檢查其是否為空。復選框值實際上是電影標題，而不是電影ID，您可能應該解決該問題，或在表單流程腳本中檢索相應的ID。
您將刪除具有給定影片ID的所有條目，但可能應該僅是與特定觀看列表相關的條目。
關於刪除過程，您可以使其成為一個查詢：
$range = implode(',', array_filter(
array_map('intval', $checkbox),
function($v){ return $v > 0; }));
$update_query = 'DELETE FROM watchlist_films WHERE film_id IN ('.$range.") AND watchlist_id = '" . $watchlist_id."'";
在您發表評論后，讓我詳細說明：
- 從表單復選框中檢索到的值在表單生成中稱為
$title，我想您在watchlist-film-controller.php計算該值，因為它在其他任何地方都沒有出現。 但是您需要刪除表中的行的值為$ rt_id。 如何從該$title計算$rt_id？
基本上，您的復選框value 應為 $rt_id ，以便在表單處理中，您不必再次查找該值。 我非常確定，對於給定的電影標題，您可能會獲得多個電影ID，因此您不能僅僅依靠標題來刪除監視列表中的條目。 假設某人的監視列表中有所有名為“ True Grit”的電影，如果她選擇刪除其中一部，您將如何處理？
請考慮將來將代碼移至PDO或mysqli API，以實現更安全的數據清理。
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