added paginate() to mysqlidb

Author: avbdr

MysqliDb.php

@@ -180,6 +180,20 @@ class MysqliDb
     protected $traceStripPrefix;
     public $trace = array();
 
+    /**
+     * Per page limit for pagination
+     *
+     * @var int
+     */
+
+    public $pageLimit = 20;
+    /**
+     * Variable that holds total pages count of last paginate() query
+     *
+     * @var int
+     */
+    public $totalPages = 0;
+
     /**
      * @param string $host
      * @param string $username
@@ -1838,6 +1852,22 @@ public function map($idField)
         $this->_mapKey = $idField;
         return $this;
     }
+
+    /**
+     * Pagination wraper to get()
+     *
+     * @access public
+     * @param string  $table The name of the database table to work with
+     * @param int $page Page number
+     * @param array|string $fields Array or coma separated list of fields to fetch
+     * @return array
+     */
+    public function paginate ($table, $page, $fields = null) {
+        $offset = $this->pageLimit * ($page - 1);
+        $res = $this->withTotalCount()->get ($table, Array ($offset, $this->pageLimit), $fields);
+        $this->totalPages = round($this->totalCount / $this->pageLimit);
+        return $res;
+    }
 }
 
-// END class
+// END class

dbObject.php

@@ -427,12 +427,10 @@ protected function count () {
      * @return array
      */
     private function paginate ($page, $fields = null) {
-        $offset = self::$pageLimit * ($page - 1);
-        $this->db->withTotalCount();
-        $results = $this->get (Array ($offset, self::$pageLimit), $fields);
-        self::$totalPages = round ($this->db->totalCount / self::$pageLimit);
-
-        return $results;
+        $this->db->pageLimit = self::$pageLimit;
+        $res = $this->db->paginate ($this->dbTable, $page, $fields);
+        self::$totalPages = $this->db->totalPages;
+        return $res;
     }
 
     /**

readme.md

@@ -198,6 +198,17 @@ foreach ($logins as $login)
     echo $login;
 ```
 
+###Pagination
+Use paginate() instead of get() to fetch paginated result
+```php
+$page = 1;
+// set page limit to 2 results per page. 20 by default
+$db->pageLimit = 2;
+$products = $db->arraybuilder()->paginate("products", $page);
+echo "showing $page out of " . $db->totalPages;
+
+```
+
 ### Result transformation / map
 Instead of getting an pure array of results its possible to get result in an associative array with a needed key. If only 2 fields to fetch will be set in get(),
 method will return result in array($k => $v) and array ($k => array ($v, $v)) in rest of the cases.