first commit

application/models/user.php

@@ -0,0 +1,38 @@
+<?php defined('SYSPATH') OR die('No direct access allowed.');
+
+class User_Model extends ORM
+{
+  protected $table_name = 'user';
+  protected $primary_val = 'username';
+
+  public function unique_key($id)
+  {
+    if (!empty($id) && is_string($id) && !ctype_digit($id))
+    {
+      return 'username';
+    }
+    return parent::unique_key($id);
+  }
+
+  public function unique_key_exists($value)
+  {
+    return (bool) $this->db
+      ->where($this->unique_key($value), $value)
+      ->count_records($this->table_name);
+  }
+
+  public function username_not_exists()
+  {
+    return (bool) ! $this->db
+      ->where(array('username' => $this->username, 'id !=' => $this->id))
+      ->count_records($this->table_name);
+  }
+
+  public function email_not_exists()
+  {
+    return (bool) ! $this->db
+      ->where(array('email' => $this->email, 'id !=' => $this->id))
+      ->count_records($this->table_name);
+  }
+
+}