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我希望在查看最近的歌曲时可以看到艺术家（歌曲艺术家）的形象。这是我猜你在回答时可能需要的 php 文件和数据库表：（如果有人能这么快地教我如何使用查询命令在交叉使用的表中选择这样的数据，我会很高兴只有一排表格。如果没有请更改代码以便查看艺术家图片）

这是助手的php代码

<?php

// no direct access
defined('_JEXEC') or die('Restricted access');

class modMusColRecentlyAddedSongsHelper
{


function getSongs(&$params)
{
    global $mainframe;
    $_db    = & JFactory::getDBO();
    $model      = modMusColRecentlyAddedSongsHelper::getModel();

        $limit = $params->get( 'n_songs', 5 );

        if($params->get( 'artist_id' )) $where_clause[] = " s.artist_id = " . $params->get( 'artist_id' ) . " " ;

        if ($params->get( 'genre_id' )) {
            $genre_id = $params->get( 'genre_id' );
            $model->getDescendantsId($genre_id); 
            $descendants = $model->descendantsId;
            $descendants[] = $genre_id ;
            $genre_clause = ' ( s.genre_id = ' . implode(' OR s.genre_id = ',$descendants) . ' ) ';
            $where_clause[] = $genre_clause;
        }


            //$where_clause[] = ' ra.type = "song" ';
            $where_clause = (count($where_clause) ? ' WHERE '.implode(' AND ', $where_clause) : '');

            $query =    ' SELECT s.*, ar.artist_name,al.name as album_name, AVG(ra.points) as points FROM #__muscol_songs as s '.
                        ' LEFT JOIN #__muscol_albums as al ON al.id = s.album_id '.
                        ' LEFT JOIN #__muscol_artists as ar ON ar.id = s.artist_id '.
                        ' LEFT JOIN #__muscol_ratings as ra ON ra.album_id = s.id AND ra.type = "song" '.
                        $where_clause .
                        ' GROUP BY s.id ' .
                        ' ORDER BY s.added DESC '.
                        ' LIMIT '. $limit;

                        //echo $query;die;


        $_db->setQuery( $query );
        $recent_songs = $_db->loadObjectList();

        //print_r($query);die;

        return $recent_songs;

}

function getModel()
{
    if (!class_exists( 'ArtistsModelSearch' ))
    {
        // Build the path to the model based upon a supplied base path
        $path = JPATH_SITE.DS.'components'.DS.'com_muscol'.DS.'models'.DS.'search.php';
        $false = false;

        // If the model file exists include it and try to instantiate the object
        if (file_exists( $path )) {
            require_once( $path );
            if (!class_exists( 'ArtistsModelSearch' )) {
                JError::raiseWarning( 0, 'Model class ArtistsModelSearch not found in file.' );
                return $false;
            }
        } else {
            JError::raiseWarning( 0, 'Model ArtistsModelSearch not supported. File not found.' );
            return $false;
        }
    }

    $model = new ArtistsModelSearch();

    return $model;
}

}

这是 default.php 代码 

<?php // no direct access
defined('_JEXEC') or die('Restricted access'); ?>
<?php
if($params->get( 'Itemid' )) $itemid = "&Itemid=".$params->get( 'Itemid' );
   else $itemid = "";
   $document =& JFactory::getDocument();
   $document->addStyleSheet(JURI::base(true).'/modules/mod_muscol_recently_added_songs/tmpl/recently_added_songs.css');
?>

 <div class='recently_added_songs'>
 <table border='0' cellpadding='0' cellspacing='0' width="100%">
 <thead>
 <tr>
  <th> <?php echo JText::_( 'آهنگ' ); ?> </th>
   <? if($params->get('show_album')){ ?><th> <?php echo JText::_( 'آلبوم' ); ?> </th><? } ?>
  <? if($params->get('show_artist')){ ?><th> <?php echo JText::_( 'خواننده' ); ?> </th><? } ?>
  <? if($params->get('show_rating')){ ?><th> <?php echo JText::_( 'امتياز' ); ?> </th><? } ?>
</tr>
</thead>
<?php
 $n = 0;
  for ($j=0, $m=count( $songs ); $j < $m; $j++) {
 $song = $songs[$j];
$link= JRoute::_( 'index.php?option=com_muscol&view=song&id='. $song->id . $itemid);
$link_album= JRoute::_( 'index.php?option=com_muscol&view=album&id='. $song->album_id . $itemid);
$link_artist= JRoute::_( 'index.php?option=com_muscol&view=artist&id='. $song->artist_id . $itemid);

//$image = MusColHelper::createThumbnail($album->image, $album->name, $params->get('default_width'), $image_attr);
?>
 <tr class="tr_recent_songs <?php echo "row$n"; ?>">
  <td><a href="<?php echo $link; ?>"><?php echo $song->name; ?></a></td>
  <? if($params->get('show_album')){ ?><td><a href="<?php echo $link_album; ?>"><?php echo $song->album_name; ?></a></td><? } ?>
  <? if($params->get('show_artist')){ ?><td><a href="<?php echo $link_artist; ?>"><?php echo $song->artist_name; ?></a></td><? } ?>
  <? if($params->get('show_rating')){ ?><td><?php echo MusColHelper::show_stars($song->points,false,false,false,true);?></td><? } ?>
</tr>
<?php
$n = 1 - $n ;
}
?>
 </table>
</div>

数据库中的歌曲表（表名是歌曲）

id  album_id  num  disc_num  length  name  lyrics  artist_id  composer_id  filename  extension  review  songwriters  chords  genre_id  hits  buy_link  video  position  downloaded  user_id

数据库中的艺术家表（艺术家图片应从图片列中读取）

id artist_name  image  review  letter  class_name  related  keywords  added  hits  country  picture  user_id  metakeywords  metadescription  city  years_active  url  genre_id
4

1 回答 1

1

您已经在帮助程序中查询了正确的表，因此 - 如果您显示的代码已经有效 - 您只需要返回额外的字段：

  $query =    ' SELECT s.*, ar.artist_name,al.name

变成

  $query =    ' SELECT s.*, ar.artist_name,ar.image as artistimage, al.name

然后在视图中：

<?php echo $song->artist_name; ?>

变成

<?php echo  $song->artist_name;
echo sprintf('<img src="%s" class="artistpic" />',$song->artistimage);
 ?>
于 2013-01-22T19:58:51.817 回答