* dao: modify the condition for setting pageID in page function after adding pager offset.

lib/dao/dao.class.php

@@ -291,6 +291,34 @@ class dao extends baseDAO
 
         return $this;
     }
+
+    /**
+     * 将记录进行分页，自动设置limit语句。
+     * Page the records, set the limit part auto.
+     *
+     * @param  object $pager
+     * @param  string $distinctField
+     * @access public
+     * @return static|sql the dao object self.
+     */
+    public function page($pager, $distinctField = '')
+    {
+        if(!is_object($pager)) return $this;
+
+        /*
+         * 重新计算分页数据，并判断是否需要返回上一页。
+         * Calculate pagination to determine whether to return to the previous page.
+         */
+        $originalPageID = $pager->pageID;
+        $recTotal       = $this->count($distinctField);
+
+        $pager->setRecTotal($recTotal);
+        $pager->setPageTotal();
+        if($originalPageID > ceil(($pager->recTotal - $pager->offset) / $pager->recPerPage)) $pager->setPageID($pager->pageTotal);
+
+        $this->sqlobj->limit($pager->limit());
+        return $this;
+    }
 }
 
 /**