[DXpedition] Create a dxpedition table

Creates a dxpedition table this will be used to store upcoming dxpedition  data from external sources.

application/config/migration.php

@@ -22,7 +22,7 @@ $config['migration_enabled'] = TRUE;
 |
 */
 
-$config['migration_version'] = 153;
+$config['migration_version'] = 154;
 
 /*
 |--------------------------------------------------------------------------

application/migrations/154_create_dxpedition_table.php

@@ -0,0 +1,59 @@
+<?php
+
+defined('BASEPATH') or exit('No direct script access allowed');
+
+/*
+*   Create a dxpedition table
+*/
+
+class Migration_create_dxpedition_table extends CI_Migration
+{
+
+    public function up()
+    {
+        /* check if the dxpedition table exists if not create dxpedition table */
+        if (!$this->db->table_exists('dxpedition')) {
+
+            $this->dbforge->add_field(array(
+                'id' => array(
+                    'type' => 'INT',
+                    'constraint' => 6,
+                    'unsigned' => TRUE,
+                    'auto_increment' => TRUE
+                ),
+                'start_date' => array(
+                    'type' => 'DATE',
+                    'null' => TRUE,
+                ),
+                'end_date' => array(
+                    'type' => 'DATE',
+                    'null' => TRUE,
+                ),
+                'callsign' => array(
+                    'type' => 'VARCHAR',
+                    'constraint' => '255',
+                    'null' => TRUE,
+                ),
+                'country' => array(
+                    'type' => 'VARCHAR',
+                    'constraint' => '255',
+                    'null' => TRUE,
+                ),
+                'notes' => array(
+                    'type' => 'VARCHAR',
+                    'constraint' => '255',
+                    'null' => TRUE,
+                ),
+            ));
+            $this->dbforge->add_key('id', TRUE);
+            $this->dbforge->add_key('callsign', TRUE);
+
+            $this->dbforge->create_table('dxpedition');
+        }
+    }
+
+    public function down()
+    {
+        $this->dbforge->drop_table('dxpedition');
+    }
+}