使用Joomla功能获取特定内容类别的文章数量

Question

我努力从我的自定义模块中获取特定类别的文章数量？任何人都不会介意以正确的方向指向我应该使用的功能吗？

我一直在使用下列内容：

$model = JModelLegacy::getInstance('Articles', 'ContentModel'); 
$model->setState('filter_fields.catid', 16); 
$articles = $model->getItems(); 

但我只得到下面的返回：

object(ContentModelArticles)[134] 
    protected 'cache' => 
    array 
     empty 
    protected 'context' => string 'com_content.articles' (length=20) 
    protected 'filter_fields' => 
    array 
     0 => string 'id' (length=2) 
     1 => string 'a.id' (length=4) 
     2 => string 'title' (length=5) 
     3 => string 'a.title' (length=7) 
     4 => string 'alias' (length=5) 
     5 => string 'a.alias' (length=7) 
     6 => string 'checked_out' (length=11) 
     7 => string 'a.checked_out' (length=13) 
     8 => string 'checked_out_time' (length=16) 
     9 => string 'a.checked_out_time' (length=18) 
     10 => string 'catid' (length=5) 
     11 => string 'a.catid' (length=7) 
     12 => string 'category_title' (length=14) 
     13 => string 'state' (length=5) 
     14 => string 'a.state' (length=7) 
     15 => string 'access' (length=6) 
     16 => string 'a.access' (length=8) 
     17 => string 'access_level' (length=12) 
     18 => string 'created' (length=7) 
     19 => string 'a.created' (length=9) 
     20 => string 'created_by' (length=10) 
     21 => string 'a.created_by' (length=12) 
     22 => string 'ordering' (length=8) 
     23 => string 'a.ordering' (length=10) 
     24 => string 'featured' (length=8) 
     25 => string 'a.featured' (length=10) 
     26 => string 'language' (length=8) 
     27 => string 'a.language' (length=10) 
     28 => string 'hits' (length=4) 
     29 => string 'a.hits' (length=6) 
     30 => string 'publish_up' (length=10) 
     31 => string 'a.publish_up' (length=12) 
     32 => string 'publish_down' (length=12) 
     33 => string 'a.publish_down' (length=14) 
     34 => string 'images' (length=6) 
     35 => string 'a.images' (length=8) 
     36 => string 'urls' (length=4) 
     37 => string 'a.urls' (length=6) 
    protected 'query' => 
    array 
     empty 
    protected '__state_set' => null 
    protected '_db' => 
    object(JDatabaseMySQLi)[15] 
     public 'name' => string 'mysqli' (length=6) 
     protected 'nameQuote' => string '`' (length=1) 
     protected 'nullDate' => string '0000-00-00 00:00:00' (length=19) 
     protected 'dbMinimum' => string '5.0.4' (length=5) 
     private '_database' (JDatabase) => string 'xxxx' (length=25) 
     protected 'connection' => 
     object(mysqli)[16] 
      public 'affected_rows' => null 
      public 'client_info' => null 
      public 'client_version' => null 
      public 'connect_errno' => null 
      public 'connect_error' => null 
      public 'errno' => null 
      public 'error' => null 
      public 'field_count' => null 
      public 'host_info' => null 
      public 'info' => null 
      public 'insert_id' => null 
      public 'server_info' => null 
      public 'server_version' => null 
      public 'sqlstate' => null 
      public 'protocol_version' => null 
      public 'thread_id' => null 
      public 'warning_count' => null 
     protected 'count' => int 0 
     protected 'cursor' => 
     object(mysqli_result)[202] 
      public 'current_field' => null 
      public 'field_count' => null 
      public 'lengths' => null 
      public 'num_rows' => null 
      public 'type' => null 
     protected 'debug' => boolean false 
     protected 'limit' => int 0 
     protected 'log' => 
     array 
      empty 
     protected 'offset' => int 0 
     protected 'sql' => 
     object(JDatabaseQueryMySQLi)[258] 
      protected 'db' => 
      &object(JDatabaseMySQLi)[15] 
      protected 'type' => string 'select' (length=6) 
      protected 'element' => null 
      protected 'select' => 
      object(JDatabaseQueryElement)[257] 
       protected 'name' => string 'SELECT' (length=6) 
       protected 'elements' => 
       array 
        0 => string 'm.id, m.title, m.module, m.position, m.content, m.showtitle, m.params, mm.menuid' (length=80) 
       protected 'glue' => string ',' (length=1) 
      protected 'delete' => null 
      protected 'update' => null 
      protected 'insert' => null 
      protected 'from' => 
      object(JDatabaseQueryElement)[259] 
       protected 'name' => string 'FROM' (length=4) 
       protected 'elements' => 
       array 
        0 => string '#__modules AS m' (length=15) 
       protected 'glue' => string ',' (length=1) 
      protected 'join' => 
      array 
       0 => 
       object(JDatabaseQueryElement)[260] 
        protected 'name' => string 'LEFT JOIN' (length=9) 
        protected 'elements' => 
        array 
         0 => string '#__modules_menu AS mm ON mm.moduleid = m.id' (length=43) 
        protected 'glue' => string ',' (length=1) 
       1 => 
       object(JDatabaseQueryElement)[262] 
        protected 'name' => string 'LEFT JOIN' (length=9) 
        protected 'elements' => 
        array 
         0 => string '#__extensions AS e ON e.element = m.module AND e.client_id = m.client_id' (length=72) 
        protected 'glue' => string ',' (length=1) 
      protected 'set' => null 
      protected 'where' => 
      object(JDatabaseQueryElement)[261] 
       protected 'name' => string 'WHERE' (length=5) 
       protected 'elements' => 
       array 
        0 => string 'm.published = 1' (length=15) 
        1 => string 'e.enabled = 1' (length=13) 
        2 => string '(m.publish_up = '0000-00-00 00:00:00' OR m.publish_up <= '2013-10-07 14:10:50')' (length=79) 
        3 => string '(m.publish_down = '0000-00-00 00:00:00' OR m.publish_down >= '2013-10-07 14:10:50')' (length=83) 
        4 => string 'm.access IN (1,1)' (length=17) 
        5 => string 'm.client_id = 0' (length=15) 
        6 => string '(mm.menuid = 113 OR mm.menuid <= 0)' (length=35) 
       protected 'glue' => string ' AND ' (length=5) 
      protected 'group' => null 
      protected 'having' => null 
      protected 'columns' => null 
      protected 'values' => null 
      protected 'order' => 
      object(JDatabaseQueryElement)[264] 
       protected 'name' => string 'ORDER BY' (length=8) 
       protected 'elements' => 
       array 
        0 => string 'm.position, m.ordering' (length=22) 
       protected 'glue' => string ',' (length=1) 
      protected 'union' => null 
      protected 'autoIncrementField' => null 
     protected 'tablePrefix' => string 'joomla_' (length=7) 
     protected 'utf' => boolean true 
     protected 'errorNum' => int 0 
     protected 'errorMsg' => string '' (length=0) 
     protected 'hasQuoted' => boolean false 
     protected 'quoted' => 
     array 
      empty 
    protected 'name' => string 'articles' (length=8) 
    protected 'option' => string 'com_content' (length=11) 
    protected 'state' => 
    object(JObject)[279] 
     protected '_errors' => 
     array 
      empty 
     public 'filter_fields.catid' => int 16 
    protected 'event_clean_cache' => string 'onContentCleanCache' (length=19) 
    protected '_errors' => 
    array 
     empty 

Answer 1

我改变了我的代码如下：

$model = JModelLegacy::getInstance('Articles', 'ContentModel'); 
$model->setState('filter.category_id', 16); 
$articles = $model->getItems(); 

$num_articles = count($articles);