24 行
		
	
	
	
		
			562 B
		
	
	
	
		
			PHP
		
	
	
	
	
	
			
		
		
	
	
			24 行
		
	
	
	
		
			562 B
		
	
	
	
		
			PHP
		
	
	
	
	
	
<?php
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defined('BASEPATH') or exit('No direct script access allowed');
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class Migration_add_station_power extends CI_Migration
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{
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	public function up()
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	{
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		$fields = array(
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			'station_power SMALLINT NULL DEFAULT NULL AFTER `station_callsign`',
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		);
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		if (!$this->db->field_exists('station_power', 'station_profile')) {
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			$this->dbforge->add_column('station_profile', $fields);
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		}
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	}
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	public function down()
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	{
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		if ($this->db->field_exists('station_power', 'station_profile')) {
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			$this->dbforge->drop_column('station_profile', 'station_power');
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		}	
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	}
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}
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